CVE-2026-43280

{"id": "CVE-2026-43280", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43280", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:16:15.978847Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "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": "ada7486c5668db542a7d361268df931aca5b726a", "lessThan": "ffba51100ff61792fefbae11ca38ac1987a818dd", "versionType": "git"}, {"status": "affected", "version": "ada7486c5668db542a7d361268df931aca5b726a", "lessThan": "79f52655567a6471ff3d0d6325ede91bb14461f4", "versionType": "git"}, {"status": "affected", "version": "ada7486c5668db542a7d361268df931aca5b726a", "lessThan": "fbbe32618e97eff81577a01eb7d9adcd64a216d7", "versionType": "git"}], "programFiles": ["drivers/gpu/drm/xe/xe_vm_madvise.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"status": "unaffected", "version": "0", "lessThan": "6.18", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.16", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.6", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/gpu/drm/xe/xe_vm_madvise.c"], "defaultStatus": "affected"}]}], "published": "2026-05-06T12:16:49.477", "references": [{"url": "https://git.kernel.org/stable/c/79f52655567a6471ff3d0d6325ede91bb14461f4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fbbe32618e97eff81577a01eb7d9adcd64a216d7", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ffba51100ff61792fefbae11ca38ac1987a818dd", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Add bounds check on pat_index to prevent OOB kernel read in madvise\n\nWhen user provides a bogus pat_index value through the madvise IOCTL, the\nxe_pat_index_get_coh_mode() function performs an array access without\nvalidating bounds. This allows a malicious user to trigger an out-of-bounds\nkernel read from the xe->pat.table array.\n\nThe vulnerability exists because the validation in madvise_args_are_sane()\ndirectly calls xe_pat_index_get_coh_mode(xe, args->pat_index.val) without\nfirst checking if pat_index is within [0, xe->pat.n_entries).\n\nAlthough xe_pat_index_get_coh_mode() has a WARN_ON to catch this in debug\nbuilds, it still performs the unsafe array access in production kernels.\n\nv2(Matthew Auld)\n- Using array_index_nospec() to mitigate spectre attacks when the value\nis used\n\nv3(Matthew Auld)\n- Put the declarations at the start of the block\n\n(cherry picked from commit 944a3329b05510d55c69c2ef455136e2fc02de29)"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/xe: A\u00f1adir comprobaci\u00f3n de l\u00edmites en pat_index para prevenir una lectura de kernel fuera de l\u00edmites (OOB) en madvise\n\nCuando el usuario proporciona un valor pat_index inv\u00e1lido a trav\u00e9s del IOCTL de madvise, la funci\u00f3n xe_pat_index_get_coh_mode() realiza un acceso a un array sin validar los l\u00edmites. Esto permite a un usuario malicioso desencadenar una lectura de kernel fuera de l\u00edmites desde el array xe -> pat.table.\n\nLa vulnerabilidad existe porque la validaci\u00f3n en madvise_args_are_sane() llama directamente a xe_pat_index_get_coh_mode(xe, args -> pat_index.val) sin comprobar primero si pat_index est\u00e1 dentro de [0, xe -> pat.n_entries).\n\nAunque xe_pat_index_get_coh_mode() tiene un WARN_ON para detectar esto en compilaciones de depuraci\u00f3n, todav\u00eda realiza el acceso inseguro al array en kernels de producci\u00f3n.\n\nv2(Matthew Auld)\n- Usando array_index_nospec() para mitigar ataques Spectre cuando se usa el valor\n\nv3(Matthew Auld)\n- Poner las declaraciones al inicio del bloque\n\n(seleccionado de la confirmaci\u00f3n 944a3329b05510d55c69c2ef455136e2fc02de29)"}], "lastModified": "2026-11-11T23:10:00.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E0D300DB-AA68-4962-981D-EF9F5E97AACF", "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}