CVE-2026-31766

{"id": "CVE-2026-31766", "cveTags": [], "metrics": {"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:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "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": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9", "lessThan": "3543005a42d7e8e12b21897ef6798541bf7cbcd3", "versionType": "git"}, {"status": "affected", "version": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9", "lessThan": "86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6", "versionType": "git"}, {"status": "affected", "version": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9", "lessThan": "a018d1819f158991b7308e4f74609c6c029b670c", "versionType": "git"}], "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"status": "unaffected", "version": "0", "lessThan": "6.16", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.22", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.12", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c"], "defaultStatus": "affected"}]}], "published": "2026-05-01T15:16:39.763", "references": [{"url": "https://git.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: validate doorbell_offset in user queue creation\n\namdgpu_userq_get_doorbell_index() passes the user-provided\ndoorbell_offset to amdgpu_doorbell_index_on_bar() without bounds\nchecking. An arbitrarily large doorbell_offset can cause the\ncalculated doorbell index to fall outside the allocated doorbell BO,\npotentially corrupting kernel doorbell space.\n\nValidate that doorbell_offset falls within the doorbell BO before\ncomputing the BAR index, using u64 arithmetic to prevent overflow.\n\n(cherry picked from commit de1ef4ffd70e1d15f0bf584fd22b1f28cbd5e2ec)"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/amdgpu: validar doorbell_offset en la creaci\u00f3n de colas de usuario\n\namdgpu_userq_get_doorbell_index() pasa el doorbell_offset proporcionado por el usuario a amdgpu_doorbell_index_on_bar() sin comprobaci\u00f3n de l\u00edmites. Un doorbell_offset arbitrariamente grande puede causar que el \u00edndice de doorbell calculado caiga fuera del BO de doorbell asignado, corrompiendo potencialmente el espacio de doorbell del kernel.\n\nValidar que doorbell_offset caiga dentro del BO de doorbell antes de calcular el \u00edndice BAR, usando aritm\u00e9tica u64 para prevenir desbordamiento.\n\n(seleccionado de la confirmaci\u00f3n de1ef4ffd70e1d15f0bf584fd22b1f28cbd5e2ec)"}], "lastModified": "2026-11-11T21:10:00.200", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B376ADEA-99DD-4C34-B0B2-7362FBE63A29", "versionEndExcluding": "6.18.22", "versionStartIncluding": "6.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0A2B9540-02D5-41B4-B16A-82AF66FD4F36", "versionEndExcluding": "6.19.12", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}