CVE-2026-64251

{"id": "CVE-2026-64251", "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": "249ebf3f65f8530beb2cbfb91bff1d83ba88d23c", "lessThan": "ba0b9f04c7a5f9887b8ce672eaf049502c0548ec", "versionType": "git"}, {"status": "affected", "version": "249ebf3f65f8530beb2cbfb91bff1d83ba88d23c", "lessThan": "e91df6d273445c03f5aa302bfe147eda33d45794", "versionType": "git"}, {"status": "affected", "version": "249ebf3f65f8530beb2cbfb91bff1d83ba88d23c", "lessThan": "73569a44fca2992f0ca4a4c0104069741b9873a0", "versionType": "git"}, {"status": "affected", "version": "249ebf3f65f8530beb2cbfb91bff1d83ba88d23c", "lessThan": "257595adf9dac15ae1edd9d07753fbc576a7583d", "versionType": "git"}], "programFiles": ["drivers/power/sequencing/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": "6.11"}, {"status": "unaffected", "version": "0", "lessThan": "6.11", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.95", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.38", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.3", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/power/sequencing/core.c"], "defaultStatus": "affected"}]}], "published": "2026-07-24T16:16:54.713", "references": [{"url": "https://git.kernel.org/stable/c/257595adf9dac15ae1edd9d07753fbc576a7583d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/73569a44fca2992f0ca4a4c0104069741b9873a0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ba0b9f04c7a5f9887b8ce672eaf049502c0548ec", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e91df6d273445c03f5aa302bfe147eda33d45794", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npwrseq: core: fix use-after-free in pwrseq_debugfs_seq_next()\n\npwrseq_debugfs_seq_next() declares 'next' with __free(put_device),\nwhich causes put_device() to be called on the returned pointer when\nthe variable goes out of scope. This results in a use-after-free\nsince the seq_file framework receives a pointer whose reference has\nalready been dropped.\n\nSimply removing __free(put_device) would fix the UAF but would leak\nthe reference acquired by bus_find_next_device(), as stop() only\ncalls up_read(&pwrseq_sem) and never releases the device reference.\n\nFix this by making the reference counting consistent across all\nseq_file callbacks, matching the standard pattern used by PCI and\nSCSI:\n\n- start(): use get_device() so it returns a referenced pointer.\n- next(): explicitly put_device(curr) to release the previous\n device's reference (no NULL check needed - the seq_file framework\n only calls next() while the previous return was non-NULL).\n- stop(): put_device(data) to release the last iterated device's\n reference, with a NULL guard since stop() may be called with NULL\n when start() returned NULL or next() reached end-of-sequence."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\npwrseq: core: correcci\u00f3n de uso despu\u00e9s de liberaci\u00f3n en pwrseq_debugfs_seq_next()\n\npwrseq_debugfs_seq_next() declara \u2019next\u2019 con __free(put_device), lo que provoca que se llame a put_device() en el puntero devuelto cuando la variable sale de \u00e1mbito. Esto resulta en un uso despu\u00e9s de liberaci\u00f3n ya que el framework seq_file recibe un puntero cuya referencia ya ha sido liberada.\n\nSimplemente eliminar __free(put_device) corregir\u00eda el UAF pero fugar\u00eda la referencia adquirida por bus_find_next_device(), ya que stop() solo llama a up_read(&pwrseq_sem) y nunca libera la referencia del dispositivo.\n\nCorregir esto haciendo que el conteo de referencias sea consistente en todas las retrollamadas de seq_file, coincidiendo con el patr\u00f3n est\u00e1ndar utilizado por PCI y SCSI:\n\n- start(): usar get_device() para que devuelva un puntero referenciado.\n- next(): llamar expl\u00edcitamente a put_device(curr) para liberar la referencia del dispositivo anterior (no se necesita comprobaci\u00f3n de NULL - el framework seq_file solo llama a next() mientras el retorno anterior no era NULL).\n- stop(): llamar a put_device(data) para liberar la referencia del \u00faltimo dispositivo iterado, con una protecci\u00f3n contra NULL ya que stop() puede ser llamado con NULL cuando start() devolvi\u00f3 NULL o next() alcanz\u00f3 el fin de secuencia."}], "lastModified": "2026-11-08T20:10:00.187", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "366244A3-18F7-431B-A01F-B0A69754C096", "versionEndExcluding": "6.12.95", "versionStartIncluding": "6.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA591B28-5D62-449E-BDBE-3C9391BF070A", "versionEndExcluding": "6.18.38", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9526B150-E2B3-4C6F-8AE5-1AF92B75AD9E", "versionEndExcluding": "7.1.3", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}