CVE-2025-40134

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40134", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.170Z", "datePublished": "2025-11-12T10:23:22.771Z", "dateUpdated": "2026-11-05T21:23:07.669Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:43:24.586Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm.c"], "versions": [{"version": "c4576aed8d85d808cd6443bda58393d525207d01", "lessThan": "9dc43ea6a20ff83fe9a5fe4be47ae0fbf2409b98", "status": "affected", "versionType": "git"}, {"version": "c4576aed8d85d808cd6443bda58393d525207d01", "lessThan": "30f95b7eda5966b81cb221bd569c0f095a068cf6", "status": "affected", "versionType": "git"}, {"version": "c4576aed8d85d808cd6443bda58393d525207d01", "lessThan": "a0e54bd8d7ea79127fe9920df3ae36f85e79ac7c", "status": "affected", "versionType": "git"}, {"version": "c4576aed8d85d808cd6443bda58393d525207d01", "lessThan": "a802901b75e13cc306f1b7ab0f062135c8034e9e", "status": "affected", "versionType": "git"}, {"version": "c4576aed8d85d808cd6443bda58393d525207d01", "lessThan": "846cafc4725ca727d94f9c4b5f789c1a7c8fb6fe", "status": "affected", "versionType": "git"}, {"version": "c4576aed8d85d808cd6443bda58393d525207d01", "lessThan": "19ca4528666990be376ac3eb6fe667b03db5324d", "status": "affected", "versionType": "git"}, {"version": "c4576aed8d85d808cd6443bda58393d525207d01", "lessThan": "331c2dd8ca8bad1a3ac10cce847ffb76158eece4", "status": "affected", "versionType": "git"}, {"version": "c4576aed8d85d808cd6443bda58393d525207d01", "lessThan": "8d33a030c566e1f105cd5bf27f37940b6367f3be", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/dm.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.301", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.246", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.195", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.156", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.112", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.53", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.3", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.4.301"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.10.246"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.15.195"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.1.156"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.6.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.12.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.17.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.18"}]}]}], "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"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-40134", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T21:13:39.562413Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-05T21:23:07.669Z"}}]}}

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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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.301", "versionStartIncluding": "5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.246", "versionStartIncluding": "5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.195", "versionStartIncluding": "5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.156", "versionStartIncluding": "5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.112", "versionStartIncluding": "5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.53", "versionStartIncluding": "5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.17.3", "versionStartIncluding": "5.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18", "versionStartIncluding": "5.0"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:43:24.586Z"}}}, "cveMetadata": {"cveId": "CVE-2025-40134", "state": "PUBLISHED", "dateUpdated": "2026-11-05T21:23:07.669Z", "dateReserved": "2025-04-16T07:20:57.170Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-11-12T10:23:22.771Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndm: corrige la desreferencia de puntero NULL en __dm_suspend()\n\nExiste una condici\u00f3n de carrera entre la suspensi\u00f3n del dispositivo dm y la carga de la tabla que puede llevar a una desreferencia de puntero nulo. El problema ocurre cuando la suspensi\u00f3n es invocada antes de que la carga de la tabla se complete:\n\nBUG: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000054\nOops: 0000 [#1] PREEMPT SMP PTI\nCPU: 6 PID: 6798 Comm: dmsetup No contaminado 6.6.0-g7e52f5f0ca9b #62\nNombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014\nRIP: 0010:blk_mq_wait_quiesce_done+0x0/0x50\nTraza de llamada:\n <TAREA>\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\nEl problema puede ser activado como se muestra a continuaci\u00f3n:\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=> \u00a1puntero NULL q->tag_set!\t(2)\n\t\t\t\t\t\t=> q->tag_set = set; (3)\n\nSoluciona esto comprobando si existe una tabla (mapa) v\u00e1lida antes de realizar la suspensi\u00f3n basada en solicitudes y esperar la E/S del objetivo. Cuando el mapa es NULL, omite estos pasos de suspensi\u00f3n dependientes de la tabla.\n\nIncluso cuando el mapa es NULL, ninguna E/S puede alcanzar ning\u00fan objetivo porque no hay ninguna tabla cargada; la E/S enviada en este estado fallar\u00e1 tempranamente en la capa DM. Omitir la l\u00f3gica de suspensi\u00f3n dependiente de la tabla en este caso es seguro y evita las desreferencias de puntero NULL."}], "id": "CVE-2025-40134", "lastModified": "2026-11-05T22:17:36.240", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-40134", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:13:39.562413Z", "version": "2.0.3"}}]}, "published": "2025-11-12T11:15:43.100", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/19ca4528666990be376ac3eb6fe667b03db5324d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/30f95b7eda5966b81cb221bd569c0f095a068cf6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/331c2dd8ca8bad1a3ac10cce847ffb76158eece4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/846cafc4725ca727d94f9c4b5f789c1a7c8fb6fe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8d33a030c566e1f105cd5bf27f37940b6367f3be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9dc43ea6a20ff83fe9a5fe4be47ae0fbf2409b98"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a0e54bd8d7ea79127fe9920df3ae36f85e79ac7c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a802901b75e13cc306f1b7ab0f062135c8034e9e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: dm: fix NULL pointer dereference in __dm_suspend()", "id": "2414468", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2414468"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndm: fix NULL pointer dereference in __dm_suspend()\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:\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>\nblk_mq_quiesce_queue+0x2c/0x50\ndm_stop_queue+0xd/0x20\n__dm_suspend+0x130/0x330\ndm_suspend+0x11a/0x180\ndev_suspend+0x27e/0x560\nctl_ioctl+0x4cf/0x850\ndm_ctl_ioctl+0xd/0x20\nvfs_ioctl+0x1d/0x50\n__se_sys_ioctl+0x9b/0xc0\n__x64_sys_ioctl+0x19/0x30\nx64_sys_call+0x2c4a/0x4620\ndo_syscall_64+0x9e/0x1b0\nThe issue can be triggered as below:\nT1 T2\ndm_suspendtable_load\n__dm_suspenddm_setup_md_queue\ndm_mq_init_request_queue\nblk_mq_init_allocated_queue\n=> q->mq_ops = set->ops; (1)\ndm_stop_queue / dm_wait_for_completion\n=> q->tag_set NULL pointer!(2)\n=> q->tag_set = set; (3)\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.\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."], "name": "CVE-2025-40134", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-11-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40134\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40134\nhttps://lore.kernel.org/linux-cve-announce/2025111254-CVE-2025-40134-4d24@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-11-12T22:12:53.929432+00:00", "updated": "2025-11-12T22:12:53.929456+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}