CVE-2026-64468

Estado: RecibidaAlta (7.8)—

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

binder: fix UAF in binder_free_transaction()

In binder_free_transaction(), the t->to_proc is read under the t->lock. However, once the t->lock is dropped, the to_proc can die in parallel. This leads to a use-after-free error when we attempt to acquire its inner lock right afterwards:

To prevent this, pin the target thread (t->to_thread) to guarantee the target process remains alive. Undelivered transactions without a target thread are already safe, as the target process can only be the current context in those paths.

Detalles técnicos trazas, registros y código del informe original

  ==================================================================
  BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x1a0
  Write of size 4 at addr ffff00001125da70 by task B/672

  CPU: 20 UID: 0 PID: 672 Comm: B Not tainted 7.1.0-rc6-00284-g8e65320d91cd #4 PREEMPT
  Hardware name: linux,dummy-virt (DT)
  Call trace:
   _raw_spin_lock+0xe4/0x1a0
   binder_free_transaction+0x8c/0x320
   binder_send_failed_reply+0x21c/0x2f8
   binder_thread_release+0x488/0x7e0
   binder_ioctl+0x12c0/0x29a0
  [...]

  Allocated by task 675:
   __kmalloc_cache_noprof+0x174/0x444
   binder_open+0x118/0xb70
   do_dentry_open+0x374/0x1040
   vfs_open+0x58/0x3bc
  [...]

  Freed by task 212:
   __kasan_slab_free+0x58/0x80
   kfree+0x1a0/0x4a4
   binder_proc_dec_tmpref+0x32c/0x5e0
   binder_deferred_func+0xc48/0x104c
   process_one_work+0x53c/0xbc0
  [...]
  ==================================================================

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.17%
Percentil entre todas las CVEs puntuadas: 6
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1499.004 Application or System Exploitationimpact75 %

UAF en kernel con acceso local (AV:L/PR:L) permite DoS; potencial escalada si se explota para ejecución, pero el texto describe principalmente crasheo del sistema.

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 Program Filter Network Traffic Execution Prevention Application Isolation and Sandboxing Exploit Protection Update 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 Kernel^AI

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-64468",
  "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": "a370003cc301d4361bae20c9ef615f89bf8d1e8a",
              "lessThan": "5602a43f251c3d75312df91a422675fc00ca3dce",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a",
              "lessThan": "0be901ab1dcc4af59b88f2e324493bb283850167",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a",
              "lessThan": "48aeda9f8039e4a6971d1804578efde7f2c01eda",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a",
              "lessThan": "45df558c543bb5543bacc8065fd7c567740781e5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a",
              "lessThan": "d45ef513eed1abebfec90c3cfb6ae50c2a4182db",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a",
              "lessThan": "328ccf32acb87e8bbb1fe2b065068c574e4db2bf",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a",
              "lessThan": "0f15f0f6ca5df566275ce517f257af2559528b41",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a",
              "lessThan": "f223d27a546c1e1f48d38fd67760e78f068fe8c4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a4a3c070b8760f71c8311399fa9bfe67c8629bca",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "22068d49d09d2b3890e19d7b2048a33340f992da",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0e3b977a8f1be01dcfa0baae68851b1f55f2a0a9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4.14.136",
              "lessThan": "4.15",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "4.19.64",
              "lessThan": "4.20",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.1.15",
              "lessThan": "5.2",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "drivers/android/binder.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.2",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/android/binder.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-07-25T10:17:32.103",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0be901ab1dcc4af59b88f2e324493bb283850167",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/0f15f0f6ca5df566275ce517f257af2559528b41",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/328ccf32acb87e8bbb1fe2b065068c574e4db2bf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/45df558c543bb5543bacc8065fd7c567740781e5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/48aeda9f8039e4a6971d1804578efde7f2c01eda",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5602a43f251c3d75312df91a422675fc00ca3dce",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d45ef513eed1abebfec90c3cfb6ae50c2a4182db",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f223d27a546c1e1f48d38fd67760e78f068fe8c4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix UAF in binder_free_transaction()\n\nIn binder_free_transaction(), the t->to_proc is read under the t->lock.\nHowever, once the t->lock is dropped, the to_proc can die in parallel.\nThis leads to a use-after-free error when we attempt to acquire its\ninner lock right afterwards:\n\n  ==================================================================\n  BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x1a0\n  Write of size 4 at addr ffff00001125da70 by task B/672\n\n  CPU: 20 UID: 0 PID: 672 Comm: B Not tainted 7.1.0-rc6-00284-g8e65320d91cd #4 PREEMPT\n  Hardware name: linux,dummy-virt (DT)\n  Call trace:\n   _raw_spin_lock+0xe4/0x1a0\n   binder_free_transaction+0x8c/0x320\n   binder_send_failed_reply+0x21c/0x2f8\n   binder_thread_release+0x488/0x7e0\n   binder_ioctl+0x12c0/0x29a0\n  [...]\n\n  Allocated by task 675:\n   __kmalloc_cache_noprof+0x174/0x444\n   binder_open+0x118/0xb70\n   do_dentry_open+0x374/0x1040\n   vfs_open+0x58/0x3bc\n  [...]\n\n  Freed by task 212:\n   __kasan_slab_free+0x58/0x80\n   kfree+0x1a0/0x4a4\n   binder_proc_dec_tmpref+0x32c/0x5e0\n   binder_deferred_func+0xc48/0x104c\n   process_one_work+0x53c/0xbc0\n  [...]\n  ==================================================================\n\nTo prevent this, pin the target thread (t->to_thread) to guarantee the\ntarget process remains alive. Undelivered transactions without a target\nthread are already safe, as the target process can only be the current\ncontext in those paths."
    }
  ],
  "lastModified": "2026-08-17T05:17:52.263",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}