{"api_version":"1","generated_at":"2026-08-08T08:04:01+00:00","cve":"CVE-2023-52751","urls":{"html":"https://cve.report/CVE-2023-52751","api":"https://cve.report/api/cve/CVE-2023-52751.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-52751","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-52751"},"summary":{"title":"smb: client: fix use-after-free in smb2_query_info_compound()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-after-free in smb2_query_info_compound()\n\nThe following UAF was triggered when running fstests generic/072 with\nKASAN enabled against Windows Server 2022 and mount options\n'multichannel,max_channels=2,vers=3.1.1,mfsymlinks,noperm'\n\n  BUG: KASAN: slab-use-after-free in smb2_query_info_compound+0x423/0x6d0 [cifs]\n  Read of size 8 at addr ffff888014941048 by task xfs_io/27534\n\n  CPU: 0 PID: 27534 Comm: xfs_io Not tainted 6.6.0-rc7 #1\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\n  rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\n  Call Trace:\n   dump_stack_lvl+0x4a/0x80\n   print_report+0xcf/0x650\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __phys_addr+0x46/0x90\n   kasan_report+0xda/0x110\n   ? smb2_query_info_compound+0x423/0x6d0 [cifs]\n   ? smb2_query_info_compound+0x423/0x6d0 [cifs]\n   smb2_query_info_compound+0x423/0x6d0 [cifs]\n   ? __pfx_smb2_query_info_compound+0x10/0x10 [cifs]\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __stack_depot_save+0x39/0x480\n   ? kasan_save_stack+0x33/0x60\n   ? kasan_set_track+0x25/0x30\n   ? ____kasan_slab_free+0x126/0x170\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n   ? __pfx_smb2_queryfs+0x10/0x10 [cifs]\n   ? __pfx___lock_acquire+0x10/0x10\n   smb311_queryfs+0x210/0x220 [cifs]\n   ? __pfx_smb311_queryfs+0x10/0x10 [cifs]\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __lock_acquire+0x480/0x26c0\n   ? lock_release+0x1ed/0x640\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? do_raw_spin_unlock+0x9b/0x100\n   cifs_statfs+0x18c/0x4b0 [cifs]\n   statfs_by_dentry+0x9b/0xf0\n   fd_statfs+0x4e/0xb0\n   __do_sys_fstatfs+0x7f/0xe0\n   ? __pfx___do_sys_fstatfs+0x10/0x10\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? lockdep_hardirqs_on_prepare+0x136/0x200\n   ? srso_alias_return_thunk+0x5/0x7f\n   do_syscall_64+0x3f/0x90\n   entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\n  Allocated by task 27534:\n   kasan_save_stack+0x33/0x60\n   kasan_set_track+0x25/0x30\n   __kasan_kmalloc+0x8f/0xa0\n   open_cached_dir+0x71b/0x1240 [cifs]\n   smb2_query_info_compound+0x5c3/0x6d0 [cifs]\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n   smb311_queryfs+0x210/0x220 [cifs]\n   cifs_statfs+0x18c/0x4b0 [cifs]\n   statfs_by_dentry+0x9b/0xf0\n   fd_statfs+0x4e/0xb0\n   __do_sys_fstatfs+0x7f/0xe0\n   do_syscall_64+0x3f/0x90\n   entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\n  Freed by task 27534:\n   kasan_save_stack+0x33/0x60\n   kasan_set_track+0x25/0x30\n   kasan_save_free_info+0x2b/0x50\n   ____kasan_slab_free+0x126/0x170\n   slab_free_freelist_hook+0xd0/0x1e0\n   __kmem_cache_free+0x9d/0x1b0\n   open_cached_dir+0xff5/0x1240 [cifs]\n   smb2_query_info_compound+0x5c3/0x6d0 [cifs]\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n\nThis is a race between open_cached_dir() and cached_dir_lease_break()\nwhere the cache entry for the open directory handle receives a lease\nbreak while creating it.  And before returning from open_cached_dir(),\nwe put the last reference of the new @cfid because of\n!@cfid->has_lease.\n\nBesides the UAF, while running xfstests a lot of missed lease breaks\nhave been noticed in tests that run several concurrent statfs(2) calls\non those cached fids\n\n  CIFS: VFS: \\\\w22-root1.gandalf.test No task to wake, unknown frame...\n  CIFS: VFS: \\\\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1...\n  CIFS: VFS: \\\\w22-root1.gandalf.test smb buf 00000000715bfe83 len 108\n  CIFS: VFS: Dump pending requests:\n  CIFS: VFS: \\\\w22-root1.gandalf.test No task to wake, unknown frame...\n  CIFS: VFS: \\\\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1...\n  CIFS: VFS: \\\\w22-root1.gandalf.test smb buf 000000005aa7316e len 108\n  ...\n\nTo fix both, in open_cached_dir() ensure that @cfid->has_lease is set\nright before sending out compounded request so that any potential\nlease break will be get processed by demultiplex thread while we're\nstill caching @cfid.  And, if open failed for some reason, re-check\n@cfid->has_lease to decide whether or not put lease reference.","state":"PUBLISHED","assigner":"Linux","published_at":"2024-05-21 16:15:14","updated_at":"2026-08-04 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Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52751","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ebe98f1447bbccf8228335c62d86af02a0ed23f7 6db94d08359c43f2c8fe372811cdee04564a41b9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ebe98f1447bbccf8228335c62d86af02a0ed23f7 93877b9afc2994c89362007aac480a7b150f386f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ebe98f1447bbccf8228335c62d86af02a0ed23f7 5c86919455c1edec99ebd3338ad213b59271a71b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1 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Container"},{"metrics":[{"other":{"content":{"id":"CVE-2023-52751","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2024-09-10T15:37:15.794672Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2024-09-11T17:33:32.822Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/client/cached_dir.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6db94d08359c43f2c8fe372811cdee04564a41b9","status":"affected","version":"ebe98f1447bbccf8228335c62d86af02a0ed23f7","versionType":"git"},{"lessThan":"93877b9afc2994c89362007aac480a7b150f386f","status":"affected","version":"ebe98f1447bbccf8228335c62d86af02a0ed23f7","versionType":"git"},{"lessThan":"5c86919455c1edec99ebd3338ad213b59271a71b","status":"affected","version":"ebe98f1447bbccf8228335c62d86af02a0ed23f7","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/client/cached_dir.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.1"},{"lessThan":"6.1","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.5.*","status":"unaffected","version":"6.5.13","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.3","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.7","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.5.13","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.3","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.7","versionStartIncluding":"6.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-after-free in smb2_query_info_compound()\n\nThe following UAF was triggered when running fstests generic/072 with\nKASAN enabled against Windows Server 2022 and mount options\n'multichannel,max_channels=2,vers=3.1.1,mfsymlinks,noperm'\n\n  BUG: KASAN: slab-use-after-free in smb2_query_info_compound+0x423/0x6d0 [cifs]\n  Read of size 8 at addr ffff888014941048 by task xfs_io/27534\n\n  CPU: 0 PID: 27534 Comm: xfs_io Not tainted 6.6.0-rc7 #1\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\n  rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\n  Call Trace:\n   dump_stack_lvl+0x4a/0x80\n   print_report+0xcf/0x650\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __phys_addr+0x46/0x90\n   kasan_report+0xda/0x110\n   ? smb2_query_info_compound+0x423/0x6d0 [cifs]\n   ? smb2_query_info_compound+0x423/0x6d0 [cifs]\n   smb2_query_info_compound+0x423/0x6d0 [cifs]\n   ? __pfx_smb2_query_info_compound+0x10/0x10 [cifs]\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __stack_depot_save+0x39/0x480\n   ? kasan_save_stack+0x33/0x60\n   ? kasan_set_track+0x25/0x30\n   ? ____kasan_slab_free+0x126/0x170\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n   ? __pfx_smb2_queryfs+0x10/0x10 [cifs]\n   ? __pfx___lock_acquire+0x10/0x10\n   smb311_queryfs+0x210/0x220 [cifs]\n   ? __pfx_smb311_queryfs+0x10/0x10 [cifs]\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __lock_acquire+0x480/0x26c0\n   ? lock_release+0x1ed/0x640\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? do_raw_spin_unlock+0x9b/0x100\n   cifs_statfs+0x18c/0x4b0 [cifs]\n   statfs_by_dentry+0x9b/0xf0\n   fd_statfs+0x4e/0xb0\n   __do_sys_fstatfs+0x7f/0xe0\n   ? __pfx___do_sys_fstatfs+0x10/0x10\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? lockdep_hardirqs_on_prepare+0x136/0x200\n   ? srso_alias_return_thunk+0x5/0x7f\n   do_syscall_64+0x3f/0x90\n   entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\n  Allocated by task 27534:\n   kasan_save_stack+0x33/0x60\n   kasan_set_track+0x25/0x30\n   __kasan_kmalloc+0x8f/0xa0\n   open_cached_dir+0x71b/0x1240 [cifs]\n   smb2_query_info_compound+0x5c3/0x6d0 [cifs]\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n   smb311_queryfs+0x210/0x220 [cifs]\n   cifs_statfs+0x18c/0x4b0 [cifs]\n   statfs_by_dentry+0x9b/0xf0\n   fd_statfs+0x4e/0xb0\n   __do_sys_fstatfs+0x7f/0xe0\n   do_syscall_64+0x3f/0x90\n   entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\n  Freed by task 27534:\n   kasan_save_stack+0x33/0x60\n   kasan_set_track+0x25/0x30\n   kasan_save_free_info+0x2b/0x50\n   ____kasan_slab_free+0x126/0x170\n   slab_free_freelist_hook+0xd0/0x1e0\n   __kmem_cache_free+0x9d/0x1b0\n   open_cached_dir+0xff5/0x1240 [cifs]\n   smb2_query_info_compound+0x5c3/0x6d0 [cifs]\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n\nThis is a race between open_cached_dir() and cached_dir_lease_break()\nwhere the cache entry for the open directory handle receives a lease\nbreak while creating it.  And before returning from open_cached_dir(),\nwe put the last reference of the new @cfid because of\n!@cfid->has_lease.\n\nBesides the UAF, while running xfstests a lot of missed lease breaks\nhave been noticed in tests that run several concurrent statfs(2) calls\non those cached fids\n\n  CIFS: VFS: \\\\w22-root1.gandalf.test No task to wake, unknown frame...\n  CIFS: VFS: \\\\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1...\n  CIFS: VFS: \\\\w22-root1.gandalf.test smb buf 00000000715bfe83 len 108\n  CIFS: VFS: Dump pending requests:\n  CIFS: VFS: \\\\w22-root1.gandalf.test No task to wake, unknown frame...\n  CIFS: VFS: \\\\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1...\n  CIFS: VFS: \\\\w22-root1.gandalf.test smb buf 000000005aa7316e len 108\n  ...\n\nTo fix both, in open_cached_dir() ensure that @cfid->has_lease is set\nright before sending out compounded request so that any potential\nlease break will be get processed by demultiplex thread while we're\nstill caching @cfid.  And, if open failed for some reason, re-check\n@cfid->has_lease to decide whether or not put lease reference."}],"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":"2026-08-04T09:11:42.826Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6db94d08359c43f2c8fe372811cdee04564a41b9"},{"url":"https://git.kernel.org/stable/c/93877b9afc2994c89362007aac480a7b150f386f"},{"url":"https://git.kernel.org/stable/c/5c86919455c1edec99ebd3338ad213b59271a71b"}],"title":"smb: client: fix use-after-free in smb2_query_info_compound()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2023-52751","datePublished":"2024-05-21T15:30:40.226Z","dateReserved":"2024-05-21T15:19:24.234Z","dateUpdated":"2026-08-04T09:11:42.826Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2024-05-21 16:15:14","lastModifiedDate":"2026-08-04 10:18:39","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}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2024-09-10T15:37:15.794672Z","id":"CVE-2023-52751","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.5.13","matchCriteriaId":"8037DB00-CF94-499F-A19D-763AB1141887"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.3","matchCriteriaId":"B58252FA-A49C-411F-9B28-DC5FE44BC5A0"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2023","CveId":"52751","Ordinal":"1","Title":"smb: client: fix use-after-free in smb2_query_info_compound()","CVE":"CVE-2023-52751","Year":"2023"},"notes":[{"CveYear":"2023","CveId":"52751","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-after-free in smb2_query_info_compound()\n\nThe following UAF was triggered when running fstests generic/072 with\nKASAN enabled against Windows Server 2022 and mount options\n'multichannel,max_channels=2,vers=3.1.1,mfsymlinks,noperm'\n\n  BUG: KASAN: slab-use-after-free in smb2_query_info_compound+0x423/0x6d0 [cifs]\n  Read of size 8 at addr ffff888014941048 by task xfs_io/27534\n\n  CPU: 0 PID: 27534 Comm: xfs_io Not tainted 6.6.0-rc7 #1\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\n  rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\n  Call Trace:\n   dump_stack_lvl+0x4a/0x80\n   print_report+0xcf/0x650\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __phys_addr+0x46/0x90\n   kasan_report+0xda/0x110\n   ? smb2_query_info_compound+0x423/0x6d0 [cifs]\n   ? smb2_query_info_compound+0x423/0x6d0 [cifs]\n   smb2_query_info_compound+0x423/0x6d0 [cifs]\n   ? __pfx_smb2_query_info_compound+0x10/0x10 [cifs]\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __stack_depot_save+0x39/0x480\n   ? kasan_save_stack+0x33/0x60\n   ? kasan_set_track+0x25/0x30\n   ? ____kasan_slab_free+0x126/0x170\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n   ? __pfx_smb2_queryfs+0x10/0x10 [cifs]\n   ? __pfx___lock_acquire+0x10/0x10\n   smb311_queryfs+0x210/0x220 [cifs]\n   ? __pfx_smb311_queryfs+0x10/0x10 [cifs]\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __lock_acquire+0x480/0x26c0\n   ? lock_release+0x1ed/0x640\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? do_raw_spin_unlock+0x9b/0x100\n   cifs_statfs+0x18c/0x4b0 [cifs]\n   statfs_by_dentry+0x9b/0xf0\n   fd_statfs+0x4e/0xb0\n   __do_sys_fstatfs+0x7f/0xe0\n   ? __pfx___do_sys_fstatfs+0x10/0x10\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? lockdep_hardirqs_on_prepare+0x136/0x200\n   ? srso_alias_return_thunk+0x5/0x7f\n   do_syscall_64+0x3f/0x90\n   entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\n  Allocated by task 27534:\n   kasan_save_stack+0x33/0x60\n   kasan_set_track+0x25/0x30\n   __kasan_kmalloc+0x8f/0xa0\n   open_cached_dir+0x71b/0x1240 [cifs]\n   smb2_query_info_compound+0x5c3/0x6d0 [cifs]\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n   smb311_queryfs+0x210/0x220 [cifs]\n   cifs_statfs+0x18c/0x4b0 [cifs]\n   statfs_by_dentry+0x9b/0xf0\n   fd_statfs+0x4e/0xb0\n   __do_sys_fstatfs+0x7f/0xe0\n   do_syscall_64+0x3f/0x90\n   entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\n  Freed by task 27534:\n   kasan_save_stack+0x33/0x60\n   kasan_set_track+0x25/0x30\n   kasan_save_free_info+0x2b/0x50\n   ____kasan_slab_free+0x126/0x170\n   slab_free_freelist_hook+0xd0/0x1e0\n   __kmem_cache_free+0x9d/0x1b0\n   open_cached_dir+0xff5/0x1240 [cifs]\n   smb2_query_info_compound+0x5c3/0x6d0 [cifs]\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n\nThis is a race between open_cached_dir() and cached_dir_lease_break()\nwhere the cache entry for the open directory handle receives a lease\nbreak while creating it.  And before returning from open_cached_dir(),\nwe put the last reference of the new @cfid because of\n!@cfid->has_lease.\n\nBesides the UAF, while running xfstests a lot of missed lease breaks\nhave been noticed in tests that run several concurrent statfs(2) calls\non those cached fids\n\n  CIFS: VFS: \\\\w22-root1.gandalf.test No task to wake, unknown frame...\n  CIFS: VFS: \\\\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1...\n  CIFS: VFS: \\\\w22-root1.gandalf.test smb buf 00000000715bfe83 len 108\n  CIFS: VFS: Dump pending requests:\n  CIFS: VFS: \\\\w22-root1.gandalf.test No task to wake, unknown frame...\n  CIFS: VFS: \\\\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1...\n  CIFS: VFS: \\\\w22-root1.gandalf.test smb buf 000000005aa7316e len 108\n  ...\n\nTo fix both, in open_cached_dir() ensure that @cfid->has_lease is set\nright before sending out compounded request so that any potential\nlease break will be get processed by demultiplex thread while we're\nstill caching @cfid.  And, if open failed for some reason, re-check\n@cfid->has_lease to decide whether or not put lease reference.","Type":"Description","Title":"smb: client: fix use-after-free in smb2_query_info_compound()"}]}}}