{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-38632", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.029Z", "datePublished": "2025-08-22T16:00:40.423Z", "dateUpdated": "2025-09-29T05:55:10.837Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-29T05:55:10.837Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinmux: fix race causing mux_owner NULL with active mux_usecount\n\ncommit 5a3e85c3c397 (\"pinmux: Use sequential access to access\ndesc->pinmux data\") tried to address the issue when two client of the\nsame gpio calls pinctrl_select_state() for the same functionality, was\nresulting in NULL pointer issue while accessing desc->mux_owner.\nHowever, issue was not completely fixed due to the way it was handled\nand it can still result in the same NULL pointer.\n\nThe issue occurs due to the following interleaving:\n\n cpu0 (process A) cpu1 (process B)\n\n pin_request() { pin_free() {\n\n mutex_lock()\n desc->mux_usecount--; //becomes 0\n ..\n mutex_unlock()\n\n mutex_lock(desc->mux)\n desc->mux_usecount++; // becomes 1\n desc->mux_owner = owner;\n mutex_unlock(desc->mux)\n\n mutex_lock(desc->mux)\n desc->mux_owner = NULL;\n mutex_unlock(desc->mux)\n\nThis sequence leads to a state where the pin appears to be in use\n(`mux_usecount == 1`) but has no owner (`mux_owner == NULL`), which can\ncause NULL pointer on next pin_request on the same pin.\n\nEnsure that updates to mux_usecount and mux_owner are performed\natomically under the same lock. Only clear mux_owner when mux_usecount\nreaches zero and no new owner has been assigned."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pinctrl/pinmux.c"], "versions": [{"version": "2da32aed4a97ca1d70fb8b77926f72f30ce5fb4b", "lessThan": "9b2a3e7189028aa7c4d53a84364f2ea9fb209787", "status": "affected", "versionType": "git"}, {"version": "c11e2ec9a780f54982a187ee10ffd1b810715c85", "lessThan": "9ea3f6b9a67be3476e331ce51cac316c2614a564", "status": "affected", "versionType": "git"}, {"version": "5a3e85c3c397c781393ea5fb2f45b1f60f8a4e6e", "lessThan": "b7bd6e3971eb7f0e34d2fdce1b18b08094e0c804", "status": "affected", "versionType": "git"}, {"version": "5a3e85c3c397c781393ea5fb2f45b1f60f8a4e6e", "lessThan": "22b585cbd67d14df3b91529d1b990661c300faa9", "status": "affected", "versionType": "git"}, {"version": "5a3e85c3c397c781393ea5fb2f45b1f60f8a4e6e", "lessThan": "0b075c011032f88d1cfde3b45d6dcf08b44140eb", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pinctrl/pinmux.c"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.102", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.42", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.10", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.1", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.66", "versionEndExcluding": "6.6.102"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.5", "versionEndExcluding": "6.12.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.15.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.16.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9b2a3e7189028aa7c4d53a84364f2ea9fb209787"}, {"url": "https://git.kernel.org/stable/c/9ea3f6b9a67be3476e331ce51cac316c2614a564"}, {"url": "https://git.kernel.org/stable/c/b7bd6e3971eb7f0e34d2fdce1b18b08094e0c804"}, {"url": "https://git.kernel.org/stable/c/22b585cbd67d14df3b91529d1b990661c300faa9"}, {"url": "https://git.kernel.org/stable/c/0b075c011032f88d1cfde3b45d6dcf08b44140eb"}], "title": "pinmux: fix race causing mux_owner NULL with active mux_usecount", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6EAE34E7-89EB-40E1-814B-1BB1C091AEB7", "versionEndExcluding": "6.6.102", "versionStartIncluding": "6.6.66", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7DB522F7-D2D4-487E-9B58-506480D775C4", "versionEndExcluding": "6.12.42", "versionStartIncluding": "6.12.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5890C690-B295-40C2-9121-FF5F987E5142", "versionEndExcluding": "6.15.10", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "58182352-D7DF-4CC9-841E-03C1D852C3FB", "versionEndExcluding": "6.16.1", "versionStartIncluding": "6.16", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinmux: fix race causing mux_owner NULL with active mux_usecount\n\ncommit 5a3e85c3c397 (\"pinmux: Use sequential access to access\ndesc->pinmux data\") tried to address the issue when two client of the\nsame gpio calls pinctrl_select_state() for the same functionality, was\nresulting in NULL pointer issue while accessing desc->mux_owner.\nHowever, issue was not completely fixed due to the way it was handled\nand it can still result in the same NULL pointer.\n\nThe issue occurs due to the following interleaving:\n\n cpu0 (process A) cpu1 (process B)\n\n pin_request() { pin_free() {\n\n mutex_lock()\n desc->mux_usecount--; //becomes 0\n ..\n mutex_unlock()\n\n mutex_lock(desc->mux)\n desc->mux_usecount++; // becomes 1\n desc->mux_owner = owner;\n mutex_unlock(desc->mux)\n\n mutex_lock(desc->mux)\n desc->mux_owner = NULL;\n mutex_unlock(desc->mux)\n\nThis sequence leads to a state where the pin appears to be in use\n(`mux_usecount == 1`) but has no owner (`mux_owner == NULL`), which can\ncause NULL pointer on next pin_request on the same pin.\n\nEnsure that updates to mux_usecount and mux_owner are performed\natomically under the same lock. Only clear mux_owner when mux_usecount\nreaches zero and no new owner has been assigned."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: pinmux: correcci\u00f3n de la carrera que causaba que mux_owner fuera nulo con el commit 5a3e85c3c397 de mux_usecount activa (\"pinmux: Usar acceso secuencial para acceder a los datos de desc->pinmux\"). Se intent\u00f3 solucionar el problema cuando dos clientes del mismo GPIO llamaban a pinctrl_select_state() para la misma funcionalidad, lo que provocaba un problema de puntero nulo al acceder a desc->mux_owner. Sin embargo, el problema no se solucion\u00f3 por completo debido a la forma en que se gestion\u00f3 y a\u00fan puede resultar en el mismo puntero nulo. El problema se produce debido a la siguiente intercalaci\u00f3n: cpu0 (proceso A) cpu1 (proceso B) pin_request() { pin_free() { mutex_lock() desc->mux_usecount--; //se convierte en 0 .. mutex_unlock() mutex_lock(desc->mux) desc->mux_usecount++; // se convierte en 1 desc->mux_owner = owner; mutex_unlock(desc->mux) mutex_lock(desc->mux) desc->mux_owner = NULL; mutex_unlock(desc->mux) Esta secuencia lleva a un estado donde el pin parece estar en uso (`mux_usecount == 1`) pero no tiene propietario (`mux_owner == NULL`), lo que puede generar un puntero nulo en la siguiente solicitud de pin en el mismo pin. Aseg\u00farese de que las actualizaciones de mux_usecount y mux_owner se realicen autom\u00e1ticamente bajo el mismo bloqueo. Solo borre mux_owner cuando mux_usecount llegue a cero y no se haya asignado un nuevo propietario."}], "id": "CVE-2025-38632", "lastModified": "2025-11-26T17:11:43.133", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-08-22T16:15:37.033", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0b075c011032f88d1cfde3b45d6dcf08b44140eb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/22b585cbd67d14df3b91529d1b990661c300faa9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9b2a3e7189028aa7c4d53a84364f2ea9fb209787"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9ea3f6b9a67be3476e331ce51cac316c2614a564"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b7bd6e3971eb7f0e34d2fdce1b18b08094e0c804"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}, {"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: pinmux: fix race causing mux_owner NULL with active mux_usecount", "id": "2390357", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2390357"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\npinmux: fix race causing mux_owner NULL with active mux_usecount\ncommit 5a3e85c3c397 (\"pinmux: Use sequential access to access\ndesc->pinmux data\") tried to address the issue when two client of the\nsame gpio calls pinctrl_select_state() for the same functionality, was\nresulting in NULL pointer issue while accessing desc->mux_owner.\nHowever, issue was not completely fixed due to the way it was handled\nand it can still result in the same NULL pointer.\nThe issue occurs due to the following interleaving:\ncpu0 (process A) cpu1 (process B)\npin_request() { pin_free() {\nmutex_lock()\ndesc->mux_usecount--; //becomes 0\n..\nmutex_unlock()\nmutex_lock(desc->mux)\ndesc->mux_usecount++; // becomes 1\ndesc->mux_owner = owner;\nmutex_unlock(desc->mux)\nmutex_lock(desc->mux)\ndesc->mux_owner = NULL;\nmutex_unlock(desc->mux)\nThis sequence leads to a state where the pin appears to be in use\n(`mux_usecount == 1`) but has no owner (`mux_owner == NULL`), which can\ncause NULL pointer on next pin_request on the same pin.\nEnsure that updates to mux_usecount and mux_owner are performed\natomically under the same lock. Only clear mux_owner when mux_usecount\nreaches zero and no new owner has been assigned."], "name": "CVE-2025-38632", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38632\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38632\nhttps://lore.kernel.org/linux-cve-announce/2025082232-CVE-2025-38632-70e1@gregkh/T"], "threat_severity": "Moderate"}