« Volver al listado

CVE-2026-72375

Estado: RecibidaAlta (7.8)—

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

afs: Fix reinitialisation of the inode, in particular ->lock_work

It seems that initalising afs_vnode::lock_work a single time in the slab's init function isn't sufficient for work_structs. This results in the DEBUG_OBJECTS debugging stuff producing a warning occasionally when running the generic/131 xfstest:

Fix this by reinitialising ->lock_work after allocating an inode.

Also, flush ->lock_work when the inode is being evicted to make sure it's not still running.

Detalles técnicos trazas, registros y código del informe original
 ODEBUG: activate not available (active state 0) object: 0000000016d8760f object type: work_struct hint: afs_lock_work+0x0/0x220
 WARNING: lib/debugobjects.c:629 at debug_print_object+0x4b/0x90, CPU#3: locktest/7695
 ...
 CPU: 3 UID: 0 PID: 7695 Comm: locktest Tainted: G S                  7.1.0-build3+ #2771 PREEMPT
 ...
 RIP: 0010:debug_print_object+0x65/0x90
 ...
 Call Trace:
  <TASK>
  ? __pfx_afs_lock_work+0x10/0x10
  debug_object_activate+0x122/0x170
  insert_work+0x25/0x60
  __queue_work+0x2e0/0x340
  queue_delayed_work_on+0x48/0x70
  afs_fl_release_private+0x57/0x70
  locks_release_private+0x5c/0xa0
  locks_free_lock+0xe/0x20
  posix_lock_inode+0x55f/0x5b0
  locks_lock_inode_wait+0x81/0x140
  ? file_write_and_wait_range+0x50/0x70
  afs_lock+0xcd/0x110
  fcntl_setlk+0x10d/0x260
  do_fcntl+0x24e/0x5b0
  __do_sys_fcntl+0x6a/0x90
  do_syscall_64+0x11e/0x310
  entry_SYSCALL_64_after_hwframe+0x71/0x79

CVSS

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad local de kernel en reinicialización de work_struct que causa DoS por activación incorrecta de objetos. AV:L, PR:L permite escalada o denegación de servicio desde usuario local.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

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-2026-72375",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "e8d6c554126b830217c5e9f549e0e21f865a0a8a",
              "lessThan": "63d3f283858fae097fb09ddd4ce46bb0bc1f9d01",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e8d6c554126b830217c5e9f549e0e21f865a0a8a",
              "lessThan": "ebfd13c0367adb43d7c0a72f5cd7e004e60c6b28",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e8d6c554126b830217c5e9f549e0e21f865a0a8a",
              "lessThan": "5597fbd1e7c161914f20315a726e54025b0fdadb",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/afs/inode.c",
            "fs/afs/super.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.23"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.23",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/afs/inode.c",
            "fs/afs/super.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:10.987",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/5597fbd1e7c161914f20315a726e54025b0fdadb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/63d3f283858fae097fb09ddd4ce46bb0bc1f9d01",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ebfd13c0367adb43d7c0a72f5cd7e004e60c6b28",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix reinitialisation of the inode, in particular ->lock_work\n\nIt seems that initalising afs_vnode::lock_work a single time in the slab's\ninit function isn't sufficient for work_structs.  This results in the\nDEBUG_OBJECTS debugging stuff producing a warning occasionally when running\nthe generic/131 xfstest:\n\n ODEBUG: activate not available (active state 0) object: 0000000016d8760f object type: work_struct hint: afs_lock_work+0x0/0x220\n WARNING: lib/debugobjects.c:629 at debug_print_object+0x4b/0x90, CPU#3: locktest/7695\n ...\n CPU: 3 UID: 0 PID: 7695 Comm: locktest Tainted: G S                  7.1.0-build3+ #2771 PREEMPT\n ...\n RIP: 0010:debug_print_object+0x65/0x90\n ...\n Call Trace:\n  <TASK>\n  ? __pfx_afs_lock_work+0x10/0x10\n  debug_object_activate+0x122/0x170\n  insert_work+0x25/0x60\n  __queue_work+0x2e0/0x340\n  queue_delayed_work_on+0x48/0x70\n  afs_fl_release_private+0x57/0x70\n  locks_release_private+0x5c/0xa0\n  locks_free_lock+0xe/0x20\n  posix_lock_inode+0x55f/0x5b0\n  locks_lock_inode_wait+0x81/0x140\n  ? file_write_and_wait_range+0x50/0x70\n  afs_lock+0xcd/0x110\n  fcntl_setlk+0x10d/0x260\n  do_fcntl+0x24e/0x5b0\n  __do_sys_fcntl+0x6a/0x90\n  do_syscall_64+0x11e/0x310\n  entry_SYSCALL_64_after_hwframe+0x71/0x79\n\nFix this by reinitialising ->lock_work after allocating an inode.\n\nAlso, flush ->lock_work when the inode is being evicted to make sure it's\nnot still running."
    }
  ],
  "lastModified": "2026-08-17T06:18:41.850",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}