CVE-2026-23183 (GCVE-0-2026-23183)
Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-02-14 16:27
VLAI?
Title
cgroup/dmem: fix NULL pointer dereference when setting max
Summary
In the Linux kernel, the following vulnerability has been resolved:
cgroup/dmem: fix NULL pointer dereference when setting max
An issue was triggered:
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: Oops: 0000 [#1] SMP NOPTI
CPU: 15 UID: 0 PID: 658 Comm: bash Tainted: 6.19.0-rc6-next-2026012
Tainted: [O]=OOT_MODULE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
RIP: 0010:strcmp+0x10/0x30
RSP: 0018:ffffc900017f7dc0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888107cd4358
RDX: 0000000019f73907 RSI: ffffffff82cc381a RDI: 0000000000000000
RBP: ffff8881016bef0d R08: 000000006c0e7145 R09: 0000000056c0e714
R10: 0000000000000001 R11: ffff888107cd4358 R12: 0007ffffffffffff
R13: ffff888101399200 R14: ffff888100fcb360 R15: 0007ffffffffffff
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000105c79000 CR4: 00000000000006f0
Call Trace:
<TASK>
dmemcg_limit_write.constprop.0+0x16d/0x390
? __pfx_set_resource_max+0x10/0x10
kernfs_fop_write_iter+0x14e/0x200
vfs_write+0x367/0x510
ksys_write+0x66/0xe0
do_syscall_64+0x6b/0x390
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f42697e1887
It was trriggered setting max without limitation, the command is like:
"echo test/region0 > dmem.max". To fix this issue, add check whether
options is valid after parsing the region_name.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"kernel/cgroup/dmem.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"lessThan": "c13816e8fa23deec6a8d7465d9e637fd02683b5c",
"status": "affected",
"version": "b168ed458ddecc176f3b9a1f4bcd83d7a4541c14",
"versionType": "git"
},
{
"lessThan": "43151f812886be1855d2cba059f9c93e4729460b",
"status": "affected",
"version": "b168ed458ddecc176f3b9a1f4bcd83d7a4541c14",
"versionType": "git"
}
]
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{
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"product": "Linux",
"programFiles": [
"kernel/cgroup/dmem.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"lessThan": "6.14",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.10",
"versionStartIncluding": "6.14",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19",
"versionStartIncluding": "6.14",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncgroup/dmem: fix NULL pointer dereference when setting max\n\nAn issue was triggered:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] SMP NOPTI\n CPU: 15 UID: 0 PID: 658 Comm: bash Tainted: 6.19.0-rc6-next-2026012\n Tainted: [O]=OOT_MODULE\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),\n RIP: 0010:strcmp+0x10/0x30\n RSP: 0018:ffffc900017f7dc0 EFLAGS: 00000246\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888107cd4358\n RDX: 0000000019f73907 RSI: ffffffff82cc381a RDI: 0000000000000000\n RBP: ffff8881016bef0d R08: 000000006c0e7145 R09: 0000000056c0e714\n R10: 0000000000000001 R11: ffff888107cd4358 R12: 0007ffffffffffff\n R13: ffff888101399200 R14: ffff888100fcb360 R15: 0007ffffffffffff\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000000 CR3: 0000000105c79000 CR4: 00000000000006f0\n Call Trace:\n \u003cTASK\u003e\n dmemcg_limit_write.constprop.0+0x16d/0x390\n ? __pfx_set_resource_max+0x10/0x10\n kernfs_fop_write_iter+0x14e/0x200\n vfs_write+0x367/0x510\n ksys_write+0x66/0xe0\n do_syscall_64+0x6b/0x390\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n RIP: 0033:0x7f42697e1887\n\nIt was trriggered setting max without limitation, the command is like:\n\"echo test/region0 \u003e dmem.max\". To fix this issue, add check whether\noptions is valid after parsing the region_name."
}
],
"providerMetadata": {
"dateUpdated": "2026-02-14T16:27:13.482Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/c13816e8fa23deec6a8d7465d9e637fd02683b5c"
},
{
"url": "https://git.kernel.org/stable/c/43151f812886be1855d2cba059f9c93e4729460b"
}
],
"title": "cgroup/dmem: fix NULL pointer dereference when setting max",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-23183",
"datePublished": "2026-02-14T16:27:13.482Z",
"dateReserved": "2026-01-13T15:37:45.984Z",
"dateUpdated": "2026-02-14T16:27:13.482Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-23183\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-14T17:15:56.067\",\"lastModified\":\"2026-02-14T17:15:56.067\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncgroup/dmem: fix NULL pointer dereference when setting max\\n\\nAn issue was triggered:\\n\\n BUG: kernel NULL pointer dereference, address: 0000000000000000\\n #PF: supervisor read access in kernel mode\\n #PF: error_code(0x0000) - not-present page\\n PGD 0 P4D 0\\n Oops: Oops: 0000 [#1] SMP NOPTI\\n CPU: 15 UID: 0 PID: 658 Comm: bash Tainted: 6.19.0-rc6-next-2026012\\n Tainted: [O]=OOT_MODULE\\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),\\n RIP: 0010:strcmp+0x10/0x30\\n RSP: 0018:ffffc900017f7dc0 EFLAGS: 00000246\\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888107cd4358\\n RDX: 0000000019f73907 RSI: ffffffff82cc381a RDI: 0000000000000000\\n RBP: ffff8881016bef0d R08: 000000006c0e7145 R09: 0000000056c0e714\\n R10: 0000000000000001 R11: ffff888107cd4358 R12: 0007ffffffffffff\\n R13: ffff888101399200 R14: ffff888100fcb360 R15: 0007ffffffffffff\\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 0000000000000000 CR3: 0000000105c79000 CR4: 00000000000006f0\\n Call Trace:\\n \u003cTASK\u003e\\n dmemcg_limit_write.constprop.0+0x16d/0x390\\n ? __pfx_set_resource_max+0x10/0x10\\n kernfs_fop_write_iter+0x14e/0x200\\n vfs_write+0x367/0x510\\n ksys_write+0x66/0xe0\\n do_syscall_64+0x6b/0x390\\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n RIP: 0033:0x7f42697e1887\\n\\nIt was trriggered setting max without limitation, the command is like:\\n\\\"echo test/region0 \u003e dmem.max\\\". To fix this issue, add check whether\\noptions is valid after parsing the region_name.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/43151f812886be1855d2cba059f9c93e4729460b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c13816e8fa23deec6a8d7465d9e637fd02683b5c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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