CVE-2025-39859

{"id": "CVE-2025-39859", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-39859", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-01-14T19:22:59.022358Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "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}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "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": "773bda96492153e11d21eb63ac814669b51fc701", "lessThan": "a59822a762039b6e0252f21b091245d6ad7f324b", "versionType": "git"}, {"status": "affected", "version": "773bda96492153e11d21eb63ac814669b51fc701", "lessThan": "e2a6eabe5304a789b7d40ce2576cd80154255e51", "versionType": "git"}, {"status": "affected", "version": "773bda96492153e11d21eb63ac814669b51fc701", "lessThan": "aad70bdfc8244616e48c434310cab241a3f17781", "versionType": "git"}, {"status": "affected", "version": "773bda96492153e11d21eb63ac814669b51fc701", "lessThan": "f10d3c7267ac7387a5129d5506c3c5f2460cfd9b", "versionType": "git"}, {"status": "affected", "version": "773bda96492153e11d21eb63ac814669b51fc701", "lessThan": "8bf935cf789872350b04c1a6468b0a509f67afb2", "versionType": "git"}], "programFiles": ["drivers/ptp/ptp_ocp.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"status": "unaffected", "version": "0", "lessThan": "5.15", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.191", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.160", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.114", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.16.6", "versionType": "semver", "lessThanOrEqual": "6.16.*"}, {"status": "unaffected", "version": "6.17", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/ptp/ptp_ocp.c"], "defaultStatus": "affected"}]}], "published": "2025-09-19T16:15:44.867", "references": [{"url": "https://git.kernel.org/stable/c/8bf935cf789872350b04c1a6468b0a509f67afb2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a59822a762039b6e0252f21b091245d6ad7f324b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/aad70bdfc8244616e48c434310cab241a3f17781", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e2a6eabe5304a789b7d40ce2576cd80154255e51", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f10d3c7267ac7387a5129d5506c3c5f2460cfd9b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nptp: ocp: fix use-after-free bugs causing by ptp_ocp_watchdog\n\nThe ptp_ocp_detach() only shuts down the watchdog timer if it is\npending. However, if the timer handler is already running, the\ntimer_delete_sync() is not called. This leads to race conditions\nwhere the devlink that contains the ptp_ocp is deallocated while\nthe timer handler is still accessing it, resulting in use-after-free\nbugs. The following details one of the race scenarios.\n\n(thread 1) | (thread 2)\nptp_ocp_remove() |\n ptp_ocp_detach() | ptp_ocp_watchdog()\n if (timer_pending(&bp->watchdog))| bp = timer_container_of()\n timer_delete_sync() |\n |\n devlink_free(devlink) //free |\n | bp-> //use\n\nResolve this by unconditionally calling timer_delete_sync() to ensure\nthe timer is reliably deactivated, preventing any access after free."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nptp: ocp: corregir errores de uso despu\u00e9s de liberaci\u00f3n causados por ptp_ocp_watchdog\n\nLa funci\u00f3n ptp_ocp_detach() solo detiene el temporizador watchdog si est\u00e1 pendiente. Sin embargo, si el gestor del temporizador ya est\u00e1 en ejecuci\u00f3n, la funci\u00f3n timer_delete_sync() no es llamada. Esto lleva a condiciones de carrera donde el devlink que contiene el ptp_ocp es desasignado mientras el gestor del temporizador todav\u00eda lo est\u00e1 accediendo, lo que resulta en errores de uso despu\u00e9s de liberaci\u00f3n. A continuaci\u00f3n se detalla uno de los escenarios de carrera.\n\n(hilo 1) | (hilo 2)\nptp_ocp_remove() |\n ptp_ocp_detach() | ptp_ocp_watchdog()\n if (timer_pending(&bp->watchdog))| bp = timer_container_of()\n timer_delete_sync() |\n |\n devlink_free(devlink) //liberar |\n | bp-> //uso\n\nEsto se resuelve llamando incondicionalmente a timer_delete_sync() para asegurar que el temporizador sea desactivado de forma fiable, evitando cualquier acceso despu\u00e9s de la liberaci\u00f3n."}], "lastModified": "2026-10-30T13:18:10.767", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CD55C621-D0D0-413E-BDF3-3E801B2A2D54", "versionEndExcluding": "6.16.6", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "327D22EF-390B-454C-BD31-2ED23C998A1C"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C730CD9A-D969-4A8E-9522-162AAF7C0EE9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "39982C4B-716E-4B2F-8196-FA301F47807D"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "340BEEA9-D70D-4290-B502-FBB1032353B1"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}