{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31766", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.140Z", "datePublished": "2026-05-01T14:14:56.622Z", "dateUpdated": "2026-05-01T14:14:56.622Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-01T14:14:56.622Z"}, "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)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c"], "versions": [{"version": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9", "lessThan": "3543005a42d7e8e12b21897ef6798541bf7cbcd3", "status": "affected", "versionType": "git"}, {"version": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9", "lessThan": "86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6", "status": "affected", "versionType": "git"}, {"version": "f09c1e6077abd1bc2ddd2b97e1135215801ca7f9", "lessThan": "a018d1819f158991b7308e4f74609c6c029b670c", "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/gpu/drm/amd/amdgpu/amdgpu_userq.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.16", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3"}, {"url": "https://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6"}, {"url": "https://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c"}], "title": "drm/amdgpu: validate doorbell_offset in user queue creation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "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)"}], "id": "CVE-2026-31766", "lastModified": "2026-05-01T15:24:14.893", "metrics": {}, "published": "2026-05-01T15:16:39.763", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{}