CVE-2025-40134 (GCVE-0-2025-40134)
Vulnerability from cvelistv5
Published
2025-11-12 10:23
Modified
2025-11-12 10:23
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
dm: fix NULL pointer dereference in __dm_suspend()
There is a race condition between dm device suspend and table load that
can lead to null pointer dereference. The issue occurs when suspend is
invoked before table load completes:
BUG: kernel NULL pointer dereference, address: 0000000000000054
Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 6 PID: 6798 Comm: dmsetup Not tainted 6.6.0-g7e52f5f0ca9b #62
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014
RIP: 0010:blk_mq_wait_quiesce_done+0x0/0x50
Call Trace:
<TASK>
blk_mq_quiesce_queue+0x2c/0x50
dm_stop_queue+0xd/0x20
__dm_suspend+0x130/0x330
dm_suspend+0x11a/0x180
dev_suspend+0x27e/0x560
ctl_ioctl+0x4cf/0x850
dm_ctl_ioctl+0xd/0x20
vfs_ioctl+0x1d/0x50
__se_sys_ioctl+0x9b/0xc0
__x64_sys_ioctl+0x19/0x30
x64_sys_call+0x2c4a/0x4620
do_syscall_64+0x9e/0x1b0
The issue can be triggered as below:
T1 T2
dm_suspend table_load
__dm_suspend dm_setup_md_queue
dm_mq_init_request_queue
blk_mq_init_allocated_queue
=> q->mq_ops = set->ops; (1)
dm_stop_queue / dm_wait_for_completion
=> q->tag_set NULL pointer! (2)
=> q->tag_set = set; (3)
Fix this by checking if a valid table (map) exists before performing
request-based suspend and waiting for target I/O. When map is NULL,
skip these table-dependent suspend steps.
Even when map is NULL, no I/O can reach any target because there is
no table loaded; I/O submitted in this state will fail early in the
DM layer. Skipping the table-dependent suspend logic in this case
is safe and avoids NULL pointer dereferences.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: c4576aed8d85d808cd6443bda58393d525207d01 Version: c4576aed8d85d808cd6443bda58393d525207d01 Version: c4576aed8d85d808cd6443bda58393d525207d01 Version: c4576aed8d85d808cd6443bda58393d525207d01 Version: c4576aed8d85d808cd6443bda58393d525207d01 Version: c4576aed8d85d808cd6443bda58393d525207d01 Version: c4576aed8d85d808cd6443bda58393d525207d01 Version: c4576aed8d85d808cd6443bda58393d525207d01 |
||
{
"containers": {
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{
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"product": "Linux",
"programFiles": [
"drivers/md/dm.c"
],
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"programFiles": [
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],
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"vendor": "Linux",
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},
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"version": "0",
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},
{
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"status": "unaffected",
"version": "5.4.301",
"versionType": "semver"
},
{
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"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"
},
{
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"version": "6.6.112",
"versionType": "semver"
},
{
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"version": "6.12.53",
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},
{
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"status": "unaffected",
"version": "6.17.3",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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},
{
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}
],
"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 \u003cTASK\u003e\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=\u003e q-\u003emq_ops = set-\u003eops; (1)\ndm_stop_queue / dm_wait_for_completion\n=\u003e q-\u003etag_set NULL pointer!\t(2)\n\t\t\t\t\t\t=\u003e q-\u003etag_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": "2025-11-12T10:23:22.771Z",
"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": "2025-11-12T10:23:22.771Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-40134\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-11-12T11:15:43.100\",\"lastModified\":\"2025-11-12T16:19:12.850\",\"vulnStatus\":\"Awaiting Analysis\",\"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 \u003cTASK\u003e\\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=\u003e q-\u003emq_ops = set-\u003eops; (1)\\ndm_stop_queue / dm_wait_for_completion\\n=\u003e q-\u003etag_set NULL pointer!\\t(2)\\n\\t\\t\\t\\t\\t\\t=\u003e q-\u003etag_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.\"}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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