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CVE-2026-23183

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

cgroup/dmem: fix NULL pointer dereference when setting max

An issue was triggered:

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.

Detalles técnicos trazas, registros y código del informe original
 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

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-23183",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "b168ed458ddecc176f3b9a1f4bcd83d7a4541c14",
              "lessThan": "c13816e8fa23deec6a8d7465d9e637fd02683b5c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b168ed458ddecc176f3b9a1f4bcd83d7a4541c14",
              "lessThan": "43151f812886be1855d2cba059f9c93e4729460b",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "kernel/cgroup/dmem.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.14",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.10",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/cgroup/dmem.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-02-14T17:15:56.067",
  "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"
    }
  ],
  "vulnStatus": "Deferred",
  "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  <TASK>\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 > 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: corrección de desreferencia de puntero NULL al establecer el máximo\n\nUn problema se desencadenó:\n\n BUG: desreferencia de puntero NULL del kernel, dirección: 0000000000000000\n #PF: acceso de lectura de supervisor en modo kernel\n #PF: código_de_error(0x0000) - página 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 desencadenó al establecer el máximo sin limitación, el comando es como:\n\"echo test/region0 &gt; dmem.max\". Para solucionar este problema, añadir una comprobación de si las opciones son válidas después de analizar el region_name."
    }
  ],
  "lastModified": "2026-06-17T10:21:03.230",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}