{"api_version":"1","generated_at":"2026-10-24T08:41:13+00:00","cve":"CVE-2025-40134","urls":{"html":"https://cve.report/CVE-2025-40134","api":"https://cve.report/api/cve/CVE-2025-40134.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-40134","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40134"},"summary":{"title":"dm: fix NULL pointer dereference in __dm_suspend()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix NULL pointer dereference in __dm_suspend()\n\nThere is a race condition between dm device suspend and table load that\ncan lead to null pointer dereference. The issue occurs when suspend is\ninvoked before table load completes:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000054\nOops: 0000 [#1] PREEMPT SMP PTI\nCPU: 6 PID: 6798 Comm: dmsetup Not tainted 6.6.0-g7e52f5f0ca9b #62\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014\nRIP: 0010:blk_mq_wait_quiesce_done+0x0/0x50\nCall Trace:\n  <TASK>\n  blk_mq_quiesce_queue+0x2c/0x50\n  dm_stop_queue+0xd/0x20\n  __dm_suspend+0x130/0x330\n  dm_suspend+0x11a/0x180\n  dev_suspend+0x27e/0x560\n  ctl_ioctl+0x4cf/0x850\n  dm_ctl_ioctl+0xd/0x20\n  vfs_ioctl+0x1d/0x50\n  __se_sys_ioctl+0x9b/0xc0\n  __x64_sys_ioctl+0x19/0x30\n  x64_sys_call+0x2c4a/0x4620\n  do_syscall_64+0x9e/0x1b0\n\nThe issue can be triggered as below:\n\nT1 \t\t\t\t\t\tT2\ndm_suspend\t\t\t\t\ttable_load\n__dm_suspend\t\t\t\t\tdm_setup_md_queue\n\t\t\t\t\t\tdm_mq_init_request_queue\n\t\t\t\t\t\tblk_mq_init_allocated_queue\n\t\t\t\t\t\t=> q->mq_ops = set->ops; (1)\ndm_stop_queue / dm_wait_for_completion\n=> q->tag_set NULL pointer!\t(2)\n\t\t\t\t\t\t=> q->tag_set = set; (3)\n\nFix this by checking if a valid table (map) exists before performing\nrequest-based suspend and waiting for target I/O. When map is NULL,\nskip these table-dependent suspend steps.\n\nEven when map is NULL, no I/O can reach any target because there is\nno table loaded; I/O submitted in this state will fail early in the\nDM layer. Skipping the table-dependent suspend logic in this case\nis safe and avoids NULL pointer dereferences.","state":"PUBLISHED","assigner":"Linux","published_at":"2025-11-12 11:15:43","updated_at":"2026-10-19 21:10:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9dc43ea6a20ff83fe9a5fe4be47ae0fbf2409b98","name":"https://git.kernel.org/stable/c/9dc43ea6a20ff83fe9a5fe4be47ae0fbf2409b98","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/846cafc4725ca727d94f9c4b5f789c1a7c8fb6fe","name":"https://git.kernel.org/stable/c/846cafc4725ca727d94f9c4b5f789c1a7c8fb6fe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8d33a030c566e1f105cd5bf27f37940b6367f3be","name":"https://git.kernel.org/stable/c/8d33a030c566e1f105cd5bf27f37940b6367f3be","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/19ca4528666990be376ac3eb6fe667b03db5324d","name":"https://git.kernel.org/stable/c/19ca4528666990be376ac3eb6fe667b03db5324d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a802901b75e13cc306f1b7ab0f062135c8034e9e","name":"https://git.kernel.org/stable/c/a802901b75e13cc306f1b7ab0f062135c8034e9e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/30f95b7eda5966b81cb221bd569c0f095a068cf6","name":"https://git.kernel.org/stable/c/30f95b7eda5966b81cb221bd569c0f095a068cf6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a0e54bd8d7ea79127fe9920df3ae36f85e79ac7c","name":"https://git.kernel.org/stable/c/a0e54bd8d7ea79127fe9920df3ae36f85e79ac7c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/331c2dd8ca8bad1a3ac10cce847ffb76158eece4","name":"https://git.kernel.org/stable/c/331c2dd8ca8bad1a3ac10cce847ffb76158eece4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-40134","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40134","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c4576aed8d85d808cd6443bda58393d525207d01 9dc43ea6a20ff83fe9a5fe4be47ae0fbf2409b98 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c4576aed8d85d808cd6443bda58393d525207d01 30f95b7eda5966b81cb221bd569c0f095a068cf6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c4576aed8d85d808cd6443bda58393d525207d01 a0e54bd8d7ea79127fe9920df3ae36f85e79ac7c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c4576aed8d85d808cd6443bda58393d525207d01 a802901b75e13cc306f1b7ab0f062135c8034e9e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c4576aed8d85d808cd6443bda58393d525207d01 846cafc4725ca727d94f9c4b5f789c1a7c8fb6fe git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c4576aed8d85d808cd6443bda58393d525207d01 19ca4528666990be376ac3eb6fe667b03db5324d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c4576aed8d85d808cd6443bda58393d525207d01 331c2dd8ca8bad1a3ac10cce847ffb76158eece4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c4576aed8d85d808cd6443bda58393d525207d01 8d33a030c566e1f105cd5bf27f37940b6367f3be git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.4.301 5.4.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.246 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.195 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.156 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.112 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.53 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17.3 6.17.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2025","cve_id":"40134","cve":"CVE-2025-40134","epss":"0.002270000","percentile":"0.125830000","score_date":"2026-10-19","updated_at":"2026-10-20 00:13:48"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/md/dm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"9dc43ea6a20ff83fe9a5fe4be47ae0fbf2409b98","status":"affected","version":"c4576aed8d85d808cd6443bda58393d525207d01","versionType":"git"},{"lessThan":"30f95b7eda5966b81cb221bd569c0f095a068cf6","status":"affected","version":"c4576aed8d85d808cd6443bda58393d525207d01","versionType":"git"},{"lessThan":"a0e54bd8d7ea79127fe9920df3ae36f85e79ac7c","status":"affected","version":"c4576aed8d85d808cd6443bda58393d525207d01","versionType":"git"},{"lessThan":"a802901b75e13cc306f1b7ab0f062135c8034e9e","status":"affected","version":"c4576aed8d85d808cd6443bda58393d525207d01","versionType":"git"},{"lessThan":"846cafc4725ca727d94f9c4b5f789c1a7c8fb6fe","status":"affected","version":"c4576aed8d85d808cd6443bda58393d525207d01","versionType":"git"},{"lessThan":"19ca4528666990be376ac3eb6fe667b03db5324d","status":"affected","version":"c4576aed8d85d808cd6443bda58393d525207d01","versionType":"git"},{"lessThan":"331c2dd8ca8bad1a3ac10cce847ffb76158eece4","status":"affected","version":"c4576aed8d85d808cd6443bda58393d525207d01","versionType":"git"},{"lessThan":"8d33a030c566e1f105cd5bf27f37940b6367f3be","status":"affected","version":"c4576aed8d85d808cd6443bda58393d525207d01","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/md/dm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.0"},{"lessThan":"5.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.4.*","status":"unaffected","version":"5.4.301","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.246","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.195","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.156","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.112","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.53","versionType":"semver"},{"lessThanOrEqual":"6.17.*","status":"unaffected","version":"6.17.3","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.18","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.4.301","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.246","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.195","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.156","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.112","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.53","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.17.3","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18","versionStartIncluding":"5.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix NULL pointer dereference in __dm_suspend()\n\nThere is a race condition between dm device suspend and table load that\ncan lead to null pointer dereference. The issue occurs when suspend is\ninvoked before table load completes:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000054\nOops: 0000 [#1] PREEMPT SMP PTI\nCPU: 6 PID: 6798 Comm: dmsetup Not tainted 6.6.0-g7e52f5f0ca9b #62\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014\nRIP: 0010:blk_mq_wait_quiesce_done+0x0/0x50\nCall Trace:\n  <TASK>\n  blk_mq_quiesce_queue+0x2c/0x50\n  dm_stop_queue+0xd/0x20\n  __dm_suspend+0x130/0x330\n  dm_suspend+0x11a/0x180\n  dev_suspend+0x27e/0x560\n  ctl_ioctl+0x4cf/0x850\n  dm_ctl_ioctl+0xd/0x20\n  vfs_ioctl+0x1d/0x50\n  __se_sys_ioctl+0x9b/0xc0\n  __x64_sys_ioctl+0x19/0x30\n  x64_sys_call+0x2c4a/0x4620\n  do_syscall_64+0x9e/0x1b0\n\nThe issue can be triggered as below:\n\nT1 \t\t\t\t\t\tT2\ndm_suspend\t\t\t\t\ttable_load\n__dm_suspend\t\t\t\t\tdm_setup_md_queue\n\t\t\t\t\t\tdm_mq_init_request_queue\n\t\t\t\t\t\tblk_mq_init_allocated_queue\n\t\t\t\t\t\t=> q->mq_ops = set->ops; (1)\ndm_stop_queue / dm_wait_for_completion\n=> q->tag_set NULL pointer!\t(2)\n\t\t\t\t\t\t=> q->tag_set = set; (3)\n\nFix this by checking if a valid table (map) exists before performing\nrequest-based suspend and waiting for target I/O. When map is NULL,\nskip these table-dependent suspend steps.\n\nEven when map is NULL, no I/O can reach any target because there is\nno table loaded; I/O submitted in this state will fail early in the\nDM layer. Skipping the table-dependent suspend logic in this case\nis safe and avoids NULL pointer dereferences."}],"providerMetadata":{"dateUpdated":"2026-05-11T21:43:24.586Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/9dc43ea6a20ff83fe9a5fe4be47ae0fbf2409b98"},{"url":"https://git.kernel.org/stable/c/30f95b7eda5966b81cb221bd569c0f095a068cf6"},{"url":"https://git.kernel.org/stable/c/a0e54bd8d7ea79127fe9920df3ae36f85e79ac7c"},{"url":"https://git.kernel.org/stable/c/a802901b75e13cc306f1b7ab0f062135c8034e9e"},{"url":"https://git.kernel.org/stable/c/846cafc4725ca727d94f9c4b5f789c1a7c8fb6fe"},{"url":"https://git.kernel.org/stable/c/19ca4528666990be376ac3eb6fe667b03db5324d"},{"url":"https://git.kernel.org/stable/c/331c2dd8ca8bad1a3ac10cce847ffb76158eece4"},{"url":"https://git.kernel.org/stable/c/8d33a030c566e1f105cd5bf27f37940b6367f3be"}],"title":"dm: fix NULL pointer dereference in __dm_suspend()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2025-40134","datePublished":"2025-11-12T10:23:22.771Z","dateReserved":"2025-04-16T07:20:57.170Z","dateUpdated":"2026-05-11T21:43:24.586Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-11-12 11:15:43","lastModifiedDate":"2026-10-19 21:10:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"40134","Ordinal":"1","Title":"dm: fix NULL pointer dereference in __dm_suspend()","CVE":"CVE-2025-40134","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"40134","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix NULL pointer dereference in __dm_suspend()\n\nThere is a race condition between dm device suspend and table load that\ncan lead to null pointer dereference. The issue occurs when suspend is\ninvoked before table load completes:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000054\nOops: 0000 [#1] PREEMPT SMP PTI\nCPU: 6 PID: 6798 Comm: dmsetup Not tainted 6.6.0-g7e52f5f0ca9b #62\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014\nRIP: 0010:blk_mq_wait_quiesce_done+0x0/0x50\nCall Trace:\n  <TASK>\n  blk_mq_quiesce_queue+0x2c/0x50\n  dm_stop_queue+0xd/0x20\n  __dm_suspend+0x130/0x330\n  dm_suspend+0x11a/0x180\n  dev_suspend+0x27e/0x560\n  ctl_ioctl+0x4cf/0x850\n  dm_ctl_ioctl+0xd/0x20\n  vfs_ioctl+0x1d/0x50\n  __se_sys_ioctl+0x9b/0xc0\n  __x64_sys_ioctl+0x19/0x30\n  x64_sys_call+0x2c4a/0x4620\n  do_syscall_64+0x9e/0x1b0\n\nThe issue can be triggered as below:\n\nT1 \t\t\t\t\t\tT2\ndm_suspend\t\t\t\t\ttable_load\n__dm_suspend\t\t\t\t\tdm_setup_md_queue\n\t\t\t\t\t\tdm_mq_init_request_queue\n\t\t\t\t\t\tblk_mq_init_allocated_queue\n\t\t\t\t\t\t=> q->mq_ops = set->ops; (1)\ndm_stop_queue / dm_wait_for_completion\n=> q->tag_set NULL pointer!\t(2)\n\t\t\t\t\t\t=> q->tag_set = set; (3)\n\nFix this by checking if a valid table (map) exists before performing\nrequest-based suspend and waiting for target I/O. When map is NULL,\nskip these table-dependent suspend steps.\n\nEven when map is NULL, no I/O can reach any target because there is\nno table loaded; I/O submitted in this state will fail early in the\nDM layer. Skipping the table-dependent suspend logic in this case\nis safe and avoids NULL pointer dereferences.","Type":"Description","Title":"dm: fix NULL pointer dereference in __dm_suspend()"}]}}}