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
Vendor Product Version
Linux Linux Affected: b168ed458ddecc176f3b9a1f4bcd83d7a4541c14 , < c13816e8fa23deec6a8d7465d9e637fd02683b5c (git)
Affected: b168ed458ddecc176f3b9a1f4bcd83d7a4541c14 , < 43151f812886be1855d2cba059f9c93e4729460b (git)
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    Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "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": [
            {
              "lessThan": "c13816e8fa23deec6a8d7465d9e637fd02683b5c",
              "status": "affected",
              "version": "b168ed458ddecc176f3b9a1f4bcd83d7a4541c14",
              "versionType": "git"
            },
            {
              "lessThan": "43151f812886be1855d2cba059f9c93e4729460b",
              "status": "affected",
              "version": "b168ed458ddecc176f3b9a1f4bcd83d7a4541c14",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "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\":\"2026-02-18T17:52:22.253\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\ncgroup/dmem: correcci\u00f3n de desreferencia de puntero NULL al establecer el m\u00e1ximo\\n\\nUn problema se desencaden\u00f3:\\n\\n BUG: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000000\\n #PF: acceso de lectura de supervisor en modo kernel\\n #PF: c\u00f3digo_de_error(0x0000) - p\u00e1gina no presente\\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 Nombre del hardware: 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 Rastro de Llamada:\\n  \\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\\nSe desencaden\u00f3 al establecer el m\u00e1ximo sin limitaci\u00f3n, el comando es como:\\n\\\"echo test/region0 \u0026gt; dmem.max\\\". Para solucionar este problema, a\u00f1adir una comprobaci\u00f3n de si las opciones son v\u00e1lidas despu\u00e9s de analizar el 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

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  • 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.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.