CVE-2026-72314

Estado: RecibidaAlta (7.8)—

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

regulator: core: regulator_lock_two() should test for EDEADLK not EDEADLOCK

Compare against -EDEADLK, which is what ww_mutex_lock() actually returns and what every other deadlock check in this file already uses.

Function regulator_lock_two() acquires two regulators via regulator_lock_nested() -> ww_mutex_lock(). On contention, ww_mutex_lock() returns -EDEADLK, which is the caller's signal to drop the lock it holds and retry the acquisition in the canonical order.

However, regulator_lock_two() tests the return value against -EDEADLOCK rather than -EDEADLK.

Leer descripción completaMostrar menos

On most architectures, EDEADLK and EDEADLOCK are the same value, so the comparison happens to be correct and the bug is invisible. But on MIPS, SPARC, and PowerPC, those two errors have different values. The test is wrong: a genuine -EDEADLK backoff no longer matches -EDEADLOCK, so instead of unlocking and retrying, the code falls into WARN_ON(ret) and returns with only one of the two regulators locked.

In practice, this is a bug only on MIPS, because the regulator core is not built or used on the other two platforms.

In general, EDEADLK is preferred over EDEADLOCK for new code.

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: 0.18%
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 escalation75 %
Impacto principalT1499.004 Application or System Exploitationimpact65 %

Vulnerabilidad local en kernel Linux que causa bloqueo incorrecto de mutex, permitiendo DoS por deadlock no manejado correctamente en arquitecturas MIPS.

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-2026-72314",
  "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": "06140d6dfe720d80566f792b4e28a9cd60a67970",
              "lessThan": "dc804f390fddd9c389edf0976356942e16878d8f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1e3056b8067c2e9b7741c4e588f0acacbe4bdafc",
              "lessThan": "8e39aa63798ea0a797fd9341419f12ef91df3238",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "849ab4cf182b38e562ffcc1b494d510e948822dd",
              "lessThan": "0c305eac40470a224671858a215963b070f9b2a9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cba6cfdc7c3f1516f0d08ddfb24e689af0932573",
              "lessThan": "29a7953e9adea6c7f9e64947745b79158e7cea7f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cba6cfdc7c3f1516f0d08ddfb24e689af0932573",
              "lessThan": "e2063307ea3b6da74585129ba7b588e8243e2ef0",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cba6cfdc7c3f1516f0d08ddfb24e689af0932573",
              "lessThan": "346e2d666a29ae7233c56b356a0487eb1d42589b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cba6cfdc7c3f1516f0d08ddfb24e689af0932573",
              "lessThan": "153d1b8b5bc30847eb70ad535f62f289aa9217e6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cba6cfdc7c3f1516f0d08ddfb24e689af0932573",
              "lessThan": "d38f8bd771c4999b797d7074b348cf201414bd34",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5224ea575196db11c0a909a78ea426ccdb92f064",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "435c65af581a61ca249bd8f717c3a147dc119f11",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "cdc042430ea9e07f77ce05a9d29e227dbdecc733",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.10.180",
              "lessThan": "5.10.261",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.15.111",
              "lessThan": "5.15.212",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.1.28",
              "lessThan": "6.1.178",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.4.243",
              "lessThan": "5.5",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.2.15",
              "lessThan": "6.3",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.3.2",
              "lessThan": "6.4",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "drivers/regulator/core.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.4",
              "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": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "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": [
            "drivers/regulator/core.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:04.223",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0c305eac40470a224671858a215963b070f9b2a9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/153d1b8b5bc30847eb70ad535f62f289aa9217e6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/29a7953e9adea6c7f9e64947745b79158e7cea7f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/346e2d666a29ae7233c56b356a0487eb1d42589b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8e39aa63798ea0a797fd9341419f12ef91df3238",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d38f8bd771c4999b797d7074b348cf201414bd34",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dc804f390fddd9c389edf0976356942e16878d8f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e2063307ea3b6da74585129ba7b588e8243e2ef0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nregulator: core: regulator_lock_two() should test for EDEADLK not EDEADLOCK\n\nCompare against -EDEADLK, which is what ww_mutex_lock() actually\nreturns and what every other deadlock check in this file already uses.\n\nFunction regulator_lock_two() acquires two regulators via\nregulator_lock_nested() -> ww_mutex_lock().  On contention,\nww_mutex_lock() returns -EDEADLK, which is the caller's signal to drop\nthe lock it holds and retry the acquisition in the canonical order.\n\nHowever, regulator_lock_two() tests the return value against -EDEADLOCK\nrather than -EDEADLK.  On most architectures, EDEADLK and EDEADLOCK are\nthe same value, so the comparison happens to be correct and the bug is\ninvisible.  But on MIPS, SPARC, and PowerPC, those two errors have\ndifferent values.  The test is wrong: a genuine -EDEADLK backoff no\nlonger matches -EDEADLOCK, so instead of unlocking and retrying, the\ncode falls into WARN_ON(ret) and returns with only one of the two\nregulators locked.\n\nIn practice, this is a bug only on MIPS, because the regulator core is\nnot built or used on the other two platforms.\n\nIn general, EDEADLK is preferred over EDEADLOCK for new code."
    }
  ],
  "lastModified": "2026-08-17T06:18:34.510",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}