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CVE-2025-40284

Estado: AplazadaAlta (7.8)—

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

Bluetooth: MGMT: cancel mesh send timer when hdev removed

mesh_send_done timer is not canceled when hdev is removed, which causes crash if the timer triggers after hdev is gone.

Cancel the timer when MGMT removes the hdev, like other MGMT timers.

Should fix the BUG: sporadically seen by BlueZ test bot (in "Mesh - Send cancel - 1" test).

Detalles técnicos trazas, registros y código del informe original
Log:
------
BUG: KASAN: slab-use-after-free in run_timer_softirq+0x76b/0x7d0
...
Freed by task 36:
 kasan_save_stack+0x24/0x50
 kasan_save_track+0x14/0x30
 __kasan_save_free_info+0x3a/0x60
 __kasan_slab_free+0x43/0x70
 kfree+0x103/0x500
 device_release+0x9a/0x210
 kobject_put+0x100/0x1e0
 vhci_release+0x18b/0x240
------

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 (AV:L/PR:L) que permite crash por use-after-free en el kernel mediante timer no cancelado; resulta en DoS al deshabilitar el dispositivo Bluetooth.

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-2025-40284",
  "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": "b338d91703fae6f6afd67f3f75caa3b8f36ddef3",
              "lessThan": "990e6143b0ca0c66f099d67d00c112bf59b30d76",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b338d91703fae6f6afd67f3f75caa3b8f36ddef3",
              "lessThan": "2927ff643607eddf4f03d10ef80fe10d977154aa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b338d91703fae6f6afd67f3f75caa3b8f36ddef3",
              "lessThan": "7b6b6c077cad0601d62c3c34ab7ce3fb25deda7b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b338d91703fae6f6afd67f3f75caa3b8f36ddef3",
              "lessThan": "fd62ca5ad136dcf6f5aa308423b299a6be6f54ea",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b338d91703fae6f6afd67f3f75caa3b8f36ddef3",
              "lessThan": "55fb52ffdd62850d667ebed842815e072d3c9961",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/bluetooth/mgmt.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.1",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.59",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.17.9",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/bluetooth/mgmt.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-12-06T22:15:56.530",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2927ff643607eddf4f03d10ef80fe10d977154aa",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/55fb52ffdd62850d667ebed842815e072d3c9961",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7b6b6c077cad0601d62c3c34ab7ce3fb25deda7b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/990e6143b0ca0c66f099d67d00c112bf59b30d76",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fd62ca5ad136dcf6f5aa308423b299a6be6f54ea",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: cancel mesh send timer when hdev removed\n\nmesh_send_done timer is not canceled when hdev is removed, which causes\ncrash if the timer triggers after hdev is gone.\n\nCancel the timer when MGMT removes the hdev, like other MGMT timers.\n\nShould fix the BUG: sporadically seen by BlueZ test bot\n(in \"Mesh - Send cancel - 1\" test).\n\nLog:\n------\nBUG: KASAN: slab-use-after-free in run_timer_softirq+0x76b/0x7d0\n...\nFreed by task 36:\n kasan_save_stack+0x24/0x50\n kasan_save_track+0x14/0x30\n __kasan_save_free_info+0x3a/0x60\n __kasan_slab_free+0x43/0x70\n kfree+0x103/0x500\n device_release+0x9a/0x210\n kobject_put+0x100/0x1e0\n vhci_release+0x18b/0x240\n------"
    }
  ],
  "lastModified": "2026-07-30T06:24:26.610",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}