{"api_version":"1","generated_at":"2026-08-17T16:00:57+00:00","cve":"CVE-2022-50432","urls":{"html":"https://cve.report/CVE-2022-50432","api":"https://cve.report/api/cve/CVE-2022-50432.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-50432","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-50432"},"summary":{"title":"kernfs: fix use-after-free in __kernfs_remove","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nkernfs: fix use-after-free in __kernfs_remove\n\nSyzkaller managed to trigger concurrent calls to\nkernfs_remove_by_name_ns() for the same file resulting in\na KASAN detected use-after-free. The race occurs when the root\nnode is freed during kernfs_drain().\n\nTo prevent this acquire an additional reference for the root\nof the tree that is removed before calling __kernfs_remove().\n\nFound by syzkaller with the following reproducer (slab_nomerge is\nrequired):\n\nsyz_mount_image$ext4(0x0, &(0x7f0000000100)='./file0\\x00', 0x100000, 0x0, 0x0, 0x0, 0x0)\nr0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='/proc/self/exe\\x00', 0x0, 0x0)\nclose(r0)\npipe2(&(0x7f0000000140)={0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x800)\nmount$9p_fd(0x0, &(0x7f0000000040)='./file0\\x00', &(0x7f00000000c0), 0x408, &(0x7f0000000280)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}, 0x2c, {[{@cache_loose}, {@mmap}, {@loose}, {@loose}, {@mmap}], [{@mask={'mask', 0x3d, '^MAY_EXEC'}}, {@fsmagic={'fsmagic', 0x3d, 0x10001}}, {@dont_hash}]}})\n\nSample report:\n\n==================================================================\nBUG: KASAN: use-after-free in kernfs_type include/linux/kernfs.h:335 [inline]\nBUG: KASAN: use-after-free in kernfs_leftmost_descendant fs/kernfs/dir.c:1261 [inline]\nBUG: KASAN: use-after-free in __kernfs_remove.part.0+0x843/0x960 fs/kernfs/dir.c:1369\nRead of size 2 at addr ffff8880088807f0 by task syz-executor.2/857\n\nCPU: 0 PID: 857 Comm: syz-executor.2 Not tainted 6.0.0-rc3-00363-g7726d4c3e60b #5\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x6e/0x91 lib/dump_stack.c:106\n print_address_description mm/kasan/report.c:317 [inline]\n print_report.cold+0x5e/0x5e5 mm/kasan/report.c:433\n kasan_report+0xa3/0x130 mm/kasan/report.c:495\n kernfs_type include/linux/kernfs.h:335 [inline]\n kernfs_leftmost_descendant fs/kernfs/dir.c:1261 [inline]\n __kernfs_remove.part.0+0x843/0x960 fs/kernfs/dir.c:1369\n __kernfs_remove fs/kernfs/dir.c:1356 [inline]\n kernfs_remove_by_name_ns+0x108/0x190 fs/kernfs/dir.c:1589\n sysfs_slab_add+0x133/0x1e0 mm/slub.c:5943\n __kmem_cache_create+0x3e0/0x550 mm/slub.c:4899\n create_cache mm/slab_common.c:229 [inline]\n kmem_cache_create_usercopy+0x167/0x2a0 mm/slab_common.c:335\n p9_client_create+0xd4d/0x1190 net/9p/client.c:993\n v9fs_session_init+0x1e6/0x13c0 fs/9p/v9fs.c:408\n v9fs_mount+0xb9/0xbd0 fs/9p/vfs_super.c:126\n legacy_get_tree+0xf1/0x200 fs/fs_context.c:610\n vfs_get_tree+0x85/0x2e0 fs/super.c:1530\n do_new_mount fs/namespace.c:3040 [inline]\n path_mount+0x675/0x1d00 fs/namespace.c:3370\n do_mount fs/namespace.c:3383 [inline]\n __do_sys_mount fs/namespace.c:3591 [inline]\n __se_sys_mount fs/namespace.c:3568 [inline]\n __x64_sys_mount+0x282/0x300 fs/namespace.c:3568\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x38/0x90 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7f725f983aed\nCode: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f725f0f7028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5\nRAX: ffffffffffffffda RBX: 00007f725faa3f80 RCX: 00007f725f983aed\nRDX: 00000000200000c0 RSI: 0000000020000040 RDI: 0000000000000000\nRBP: 00007f725f9f419c R08: 0000000020000280 R09: 0000000000000000\nR10: 0000000000000408 R11: 0000000000000246 R12: 0000000000000000\nR13: 0000000000000006 R14: 00007f725faa3f80 R15: 00007f725f0d7000\n </TASK>\n\nAllocated by task 855:\n kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38\n kasan_set_track mm/kasan/common.c:45 [inline]\n set_alloc_info mm/kasan/common.c:437 [inline]\n __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:470\n kasan_slab_alloc include/linux/kasan.h:224 [inline]\n slab_post_alloc_hook mm/slab.h:7\n---truncated---","state":"PUBLISHED","assigner":"Linux","published_at":"2025-10-01 12:15:34","updated_at":"2026-08-04 10:18:16"},"problem_types":["CWE-416"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/028cf780743eea79abffa7206b9dcfc080ad3546","name":"https://git.kernel.org/stable/c/028cf780743eea79abffa7206b9dcfc080ad3546","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/af1b57cc39beca203559576b3046094fc9e5eb32","name":"https://git.kernel.org/stable/c/af1b57cc39beca203559576b3046094fc9e5eb32","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c78b0dc6fb7fb389d674e491fd376388cdfb1d53","name":"https://git.kernel.org/stable/c/c78b0dc6fb7fb389d674e491fd376388cdfb1d53","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/94d2643df1e70a4c310ebb5e2c493eec33df1a06","name":"https://git.kernel.org/stable/c/94d2643df1e70a4c310ebb5e2c493eec33df1a06","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4abc99652812a2ddf932f137515d5c5a04723538","name":"https://git.kernel.org/stable/c/4abc99652812a2ddf932f137515d5c5a04723538","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6f72a3977ba9d0e5491a5c01315204272e7f9c44","name":"https://git.kernel.org/stable/c/6f72a3977ba9d0e5491a5c01315204272e7f9c44","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/02eb35131050735332658029082f61515b7dfe38","name":"https://git.kernel.org/stable/c/02eb35131050735332658029082f61515b7dfe38","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4dfd6a477a1525773469feaf3c514b2c0fef76b5","name":"https://git.kernel.org/stable/c/4dfd6a477a1525773469feaf3c514b2c0fef76b5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-50432","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50432","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45a140e587f3d32d8d424ed940dffb61e1739047 4dfd6a477a1525773469feaf3c514b2c0fef76b5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45a140e587f3d32d8d424ed940dffb61e1739047 02eb35131050735332658029082f61515b7dfe38 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45a140e587f3d32d8d424ed940dffb61e1739047 028cf780743eea79abffa7206b9dcfc080ad3546 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45a140e587f3d32d8d424ed940dffb61e1739047 c78b0dc6fb7fb389d674e491fd376388cdfb1d53 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45a140e587f3d32d8d424ed940dffb61e1739047 6f72a3977ba9d0e5491a5c01315204272e7f9c44 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45a140e587f3d32d8d424ed940dffb61e1739047 94d2643df1e70a4c310ebb5e2c493eec33df1a06 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45a140e587f3d32d8d424ed940dffb61e1739047 af1b57cc39beca203559576b3046094fc9e5eb32 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 45a140e587f3d32d8d424ed940dffb61e1739047 4abc99652812a2ddf932f137515d5c5a04723538 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.9.332 4.9.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.14.298 4.14.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.19.264 4.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4.223 5.4.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.153 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.77 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.0.7 6.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2022","cve_id":"50432","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/kernfs/dir.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4dfd6a477a1525773469feaf3c514b2c0fef76b5","status":"affected","version":"45a140e587f3d32d8d424ed940dffb61e1739047","versionType":"git"},{"lessThan":"02eb35131050735332658029082f61515b7dfe38","status":"affected","version":"45a140e587f3d32d8d424ed940dffb61e1739047","versionType":"git"},{"lessThan":"028cf780743eea79abffa7206b9dcfc080ad3546","status":"affected","version":"45a140e587f3d32d8d424ed940dffb61e1739047","versionType":"git"},{"lessThan":"c78b0dc6fb7fb389d674e491fd376388cdfb1d53","status":"affected","version":"45a140e587f3d32d8d424ed940dffb61e1739047","versionType":"git"},{"lessThan":"6f72a3977ba9d0e5491a5c01315204272e7f9c44","status":"affected","version":"45a140e587f3d32d8d424ed940dffb61e1739047","versionType":"git"},{"lessThan":"94d2643df1e70a4c310ebb5e2c493eec33df1a06","status":"affected","version":"45a140e587f3d32d8d424ed940dffb61e1739047","versionType":"git"},{"lessThan":"af1b57cc39beca203559576b3046094fc9e5eb32","status":"affected","version":"45a140e587f3d32d8d424ed940dffb61e1739047","versionType":"git"},{"lessThan":"4abc99652812a2ddf932f137515d5c5a04723538","status":"affected","version":"45a140e587f3d32d8d424ed940dffb61e1739047","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/kernfs/dir.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.14"},{"lessThan":"3.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"4.9.*","status":"unaffected","version":"4.9.332","versionType":"semver"},{"lessThanOrEqual":"4.14.*","status":"unaffected","version":"4.14.298","versionType":"semver"},{"lessThanOrEqual":"4.19.*","status":"unaffected","version":"4.19.264","versionType":"semver"},{"lessThanOrEqual":"5.4.*","status":"unaffected","version":"5.4.223","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.153","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.77","versionType":"semver"},{"lessThanOrEqual":"6.0.*","status":"unaffected","version":"6.0.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.9.332","versionStartIncluding":"3.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.14.298","versionStartIncluding":"3.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"4.19.264","versionStartIncluding":"3.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.4.223","versionStartIncluding":"3.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.153","versionStartIncluding":"3.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.77","versionStartIncluding":"3.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.0.7","versionStartIncluding":"3.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1","versionStartIncluding":"3.14","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nkernfs: fix use-after-free in __kernfs_remove\n\nSyzkaller managed to trigger concurrent calls to\nkernfs_remove_by_name_ns() for the same file resulting in\na KASAN detected use-after-free. The race occurs when the root\nnode is freed during kernfs_drain().\n\nTo prevent this acquire an additional reference for the root\nof the tree that is removed before calling __kernfs_remove().\n\nFound by syzkaller with the following reproducer (slab_nomerge is\nrequired):\n\nsyz_mount_image$ext4(0x0, &(0x7f0000000100)='./file0\\x00', 0x100000, 0x0, 0x0, 0x0, 0x0)\nr0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='/proc/self/exe\\x00', 0x0, 0x0)\nclose(r0)\npipe2(&(0x7f0000000140)={0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x800)\nmount$9p_fd(0x0, &(0x7f0000000040)='./file0\\x00', &(0x7f00000000c0), 0x408, &(0x7f0000000280)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}, 0x2c, {[{@cache_loose}, {@mmap}, {@loose}, {@loose}, {@mmap}], [{@mask={'mask', 0x3d, '^MAY_EXEC'}}, {@fsmagic={'fsmagic', 0x3d, 0x10001}}, {@dont_hash}]}})\n\nSample report:\n\n==================================================================\nBUG: KASAN: use-after-free in kernfs_type include/linux/kernfs.h:335 [inline]\nBUG: KASAN: use-after-free in kernfs_leftmost_descendant fs/kernfs/dir.c:1261 [inline]\nBUG: KASAN: use-after-free in __kernfs_remove.part.0+0x843/0x960 fs/kernfs/dir.c:1369\nRead of size 2 at addr ffff8880088807f0 by task syz-executor.2/857\n\nCPU: 0 PID: 857 Comm: syz-executor.2 Not tainted 6.0.0-rc3-00363-g7726d4c3e60b #5\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x6e/0x91 lib/dump_stack.c:106\n print_address_description mm/kasan/report.c:317 [inline]\n print_report.cold+0x5e/0x5e5 mm/kasan/report.c:433\n kasan_report+0xa3/0x130 mm/kasan/report.c:495\n kernfs_type include/linux/kernfs.h:335 [inline]\n kernfs_leftmost_descendant fs/kernfs/dir.c:1261 [inline]\n __kernfs_remove.part.0+0x843/0x960 fs/kernfs/dir.c:1369\n __kernfs_remove fs/kernfs/dir.c:1356 [inline]\n kernfs_remove_by_name_ns+0x108/0x190 fs/kernfs/dir.c:1589\n sysfs_slab_add+0x133/0x1e0 mm/slub.c:5943\n __kmem_cache_create+0x3e0/0x550 mm/slub.c:4899\n create_cache mm/slab_common.c:229 [inline]\n kmem_cache_create_usercopy+0x167/0x2a0 mm/slab_common.c:335\n p9_client_create+0xd4d/0x1190 net/9p/client.c:993\n v9fs_session_init+0x1e6/0x13c0 fs/9p/v9fs.c:408\n v9fs_mount+0xb9/0xbd0 fs/9p/vfs_super.c:126\n legacy_get_tree+0xf1/0x200 fs/fs_context.c:610\n vfs_get_tree+0x85/0x2e0 fs/super.c:1530\n do_new_mount fs/namespace.c:3040 [inline]\n path_mount+0x675/0x1d00 fs/namespace.c:3370\n do_mount fs/namespace.c:3383 [inline]\n __do_sys_mount fs/namespace.c:3591 [inline]\n __se_sys_mount fs/namespace.c:3568 [inline]\n __x64_sys_mount+0x282/0x300 fs/namespace.c:3568\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x38/0x90 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7f725f983aed\nCode: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f725f0f7028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5\nRAX: ffffffffffffffda RBX: 00007f725faa3f80 RCX: 00007f725f983aed\nRDX: 00000000200000c0 RSI: 0000000020000040 RDI: 0000000000000000\nRBP: 00007f725f9f419c R08: 0000000020000280 R09: 0000000000000000\nR10: 0000000000000408 R11: 0000000000000246 R12: 0000000000000000\nR13: 0000000000000006 R14: 00007f725faa3f80 R15: 00007f725f0d7000\n </TASK>\n\nAllocated by task 855:\n kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38\n kasan_set_track mm/kasan/common.c:45 [inline]\n set_alloc_info mm/kasan/common.c:437 [inline]\n __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:470\n kasan_slab_alloc include/linux/kasan.h:224 [inline]\n slab_post_alloc_hook mm/slab.h:7\n---truncated---"}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-08-04T09:09:04.254Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4dfd6a477a1525773469feaf3c514b2c0fef76b5"},{"url":"https://git.kernel.org/stable/c/02eb35131050735332658029082f61515b7dfe38"},{"url":"https://git.kernel.org/stable/c/028cf780743eea79abffa7206b9dcfc080ad3546"},{"url":"https://git.kernel.org/stable/c/c78b0dc6fb7fb389d674e491fd376388cdfb1d53"},{"url":"https://git.kernel.org/stable/c/6f72a3977ba9d0e5491a5c01315204272e7f9c44"},{"url":"https://git.kernel.org/stable/c/94d2643df1e70a4c310ebb5e2c493eec33df1a06"},{"url":"https://git.kernel.org/stable/c/af1b57cc39beca203559576b3046094fc9e5eb32"},{"url":"https://git.kernel.org/stable/c/4abc99652812a2ddf932f137515d5c5a04723538"}],"title":"kernfs: fix use-after-free in __kernfs_remove","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2022-50432","datePublished":"2025-10-01T11:42:10.573Z","dateReserved":"2025-09-17T14:53:07.009Z","dateUpdated":"2026-08-04T09:09:04.254Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-10-01 12:15:34","lastModifiedDate":"2026-08-04 10:18:16","problem_types":["CWE-416"],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"4.9.332","matchCriteriaId":"37026F01-AFEE-47AC-B31E-05AD5F5200BD"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"4.14.298","matchCriteriaId":"7140B9A2-EB63-497C-96B1-68A96CD99051"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"4.19.264","matchCriteriaId":"8AE23A9F-BF98-4055-AA49-02118B96226D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.223","matchCriteriaId":"7FE3F72A-5992-4ABB-A961-F834281060A9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.153","matchCriteriaId":"62052E35-0E91-4164-BB92-83270CEA0113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.77","matchCriteriaId":"756161DE-EFE3-4008-964A-DFE360B188B7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.0.7","matchCriteriaId":"65D387F0-209C-4EAD-98BA-C4B430A840C9"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2022","CveId":"50432","Ordinal":"1","Title":"kernfs: fix use-after-free in __kernfs_remove","CVE":"CVE-2022-50432","Year":"2022"},"notes":[{"CveYear":"2022","CveId":"50432","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nkernfs: fix use-after-free in __kernfs_remove\n\nSyzkaller managed to trigger concurrent calls to\nkernfs_remove_by_name_ns() for the same file resulting in\na KASAN detected use-after-free. The race occurs when the root\nnode is freed during kernfs_drain().\n\nTo prevent this acquire an additional reference for the root\nof the tree that is removed before calling __kernfs_remove().\n\nFound by syzkaller with the following reproducer (slab_nomerge is\nrequired):\n\nsyz_mount_image$ext4(0x0, &(0x7f0000000100)='./file0\\x00', 0x100000, 0x0, 0x0, 0x0, 0x0)\nr0 = openat(0xffffffffffffff9c, &(0x7f0000000080)='/proc/self/exe\\x00', 0x0, 0x0)\nclose(r0)\npipe2(&(0x7f0000000140)={0xffffffffffffffff, <r1=>0xffffffffffffffff}, 0x800)\nmount$9p_fd(0x0, &(0x7f0000000040)='./file0\\x00', &(0x7f00000000c0), 0x408, &(0x7f0000000280)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}, 0x2c, {[{@cache_loose}, {@mmap}, {@loose}, {@loose}, {@mmap}], [{@mask={'mask', 0x3d, '^MAY_EXEC'}}, {@fsmagic={'fsmagic', 0x3d, 0x10001}}, {@dont_hash}]}})\n\nSample report:\n\n==================================================================\nBUG: KASAN: use-after-free in kernfs_type include/linux/kernfs.h:335 [inline]\nBUG: KASAN: use-after-free in kernfs_leftmost_descendant fs/kernfs/dir.c:1261 [inline]\nBUG: KASAN: use-after-free in __kernfs_remove.part.0+0x843/0x960 fs/kernfs/dir.c:1369\nRead of size 2 at addr ffff8880088807f0 by task syz-executor.2/857\n\nCPU: 0 PID: 857 Comm: syz-executor.2 Not tainted 6.0.0-rc3-00363-g7726d4c3e60b #5\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x6e/0x91 lib/dump_stack.c:106\n print_address_description mm/kasan/report.c:317 [inline]\n print_report.cold+0x5e/0x5e5 mm/kasan/report.c:433\n kasan_report+0xa3/0x130 mm/kasan/report.c:495\n kernfs_type include/linux/kernfs.h:335 [inline]\n kernfs_leftmost_descendant fs/kernfs/dir.c:1261 [inline]\n __kernfs_remove.part.0+0x843/0x960 fs/kernfs/dir.c:1369\n __kernfs_remove fs/kernfs/dir.c:1356 [inline]\n kernfs_remove_by_name_ns+0x108/0x190 fs/kernfs/dir.c:1589\n sysfs_slab_add+0x133/0x1e0 mm/slub.c:5943\n __kmem_cache_create+0x3e0/0x550 mm/slub.c:4899\n create_cache mm/slab_common.c:229 [inline]\n kmem_cache_create_usercopy+0x167/0x2a0 mm/slab_common.c:335\n p9_client_create+0xd4d/0x1190 net/9p/client.c:993\n v9fs_session_init+0x1e6/0x13c0 fs/9p/v9fs.c:408\n v9fs_mount+0xb9/0xbd0 fs/9p/vfs_super.c:126\n legacy_get_tree+0xf1/0x200 fs/fs_context.c:610\n vfs_get_tree+0x85/0x2e0 fs/super.c:1530\n do_new_mount fs/namespace.c:3040 [inline]\n path_mount+0x675/0x1d00 fs/namespace.c:3370\n do_mount fs/namespace.c:3383 [inline]\n __do_sys_mount fs/namespace.c:3591 [inline]\n __se_sys_mount fs/namespace.c:3568 [inline]\n __x64_sys_mount+0x282/0x300 fs/namespace.c:3568\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x38/0x90 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7f725f983aed\nCode: 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f725f0f7028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5\nRAX: ffffffffffffffda RBX: 00007f725faa3f80 RCX: 00007f725f983aed\nRDX: 00000000200000c0 RSI: 0000000020000040 RDI: 0000000000000000\nRBP: 00007f725f9f419c R08: 0000000020000280 R09: 0000000000000000\nR10: 0000000000000408 R11: 0000000000000246 R12: 0000000000000000\nR13: 0000000000000006 R14: 00007f725faa3f80 R15: 00007f725f0d7000\n </TASK>\n\nAllocated by task 855:\n kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38\n kasan_set_track mm/kasan/common.c:45 [inline]\n set_alloc_info mm/kasan/common.c:437 [inline]\n __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:470\n kasan_slab_alloc include/linux/kasan.h:224 [inline]\n slab_post_alloc_hook mm/slab.h:7\n---truncated---","Type":"Description","Title":"kernfs: fix use-after-free in __kernfs_remove"}]}}}