{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-46204", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.104Z", "datePublished": "2026-05-28T09:40:21.933Z", "dateUpdated": "2026-08-05T12:30:26.200Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:30:26.200Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn4: Prevent OOB reads when parsing IB\n\nRewrite the IB parsing to use amdgpu_ib_get_value() which handles the\nbounds checks." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - Reached only via the local amdgpu command-submission ioctl (DRM_IOCTL_AMDGPU_CS) on a DRM render node; no network or adjacent vector is involved.\nAC:L - The attacker fully controls the IB contents, length_dw, and the backing BO size/layout, so positioning the parser so that idx+6..+8 reads cross the BO's last mapped page is reliably reproducible.\nPR:L - Requires the ability to open the DRM render node and submit command buffers, i.e. an unprivileged local user with GPU/graphics-session access; no elevated capability is needed.\nUI:N - The malicious command buffer is submitted directly by the attacker; no action by another user is required.\nS:U - Parsing runs on the CPU in kernel context and the OOB access stays within the kernel's own memory; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unchecked indexing reads kernel memory beyond the IB buffer object (decode_buffer fields and loop words), an out-of-bounds read of kernel memory that is not strictly limited to a couple of bytes.\nI:N - The flaw is purely an out-of-bounds read; the parser performs no OOB write and the OOB-derived address is re-validated before use, so no kernel data is modifiable.\nA:H - Reading past the BO into an unmapped kernel page faults during command submission, producing a kernel oops/crash that the attacker can trigger on demand." } ] } ], "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/vcn_v4_0.c" ], "versions": [ { "version": "0b15205c7325dc20b7da0068307670d222d66949", "lessThan": "1dc005775fb5b3f86464406452b17364f85581d3", "status": "affected", "versionType": "git" }, { "version": "0b15205c7325dc20b7da0068307670d222d66949", "lessThan": "d0802a8877d730260d4af4dd4e0b6cde7e0e593f", "status": "affected", "versionType": "git" }, { "version": "0b15205c7325dc20b7da0068307670d222d66949", "lessThan": "a6d5563ba1f03a049561cd347574613167294e8d", "status": "affected", "versionType": "git" }, { "version": "0b15205c7325dc20b7da0068307670d222d66949", "lessThan": "5c3e8ebad0c9e2354ddfa8f2148dc4f70a3b4bd1", "status": "affected", "versionType": "git" }, { "version": "0b15205c7325dc20b7da0068307670d222d66949", "lessThan": "2444eb0ec8283f4a3845eb7febad378476e1ba3c", "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/vcn_v4_0.c" ], "versions": [ { "version": "6.0", "status": "affected" }, { "version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.90", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.32", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.9", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "6.0", "versionEndExcluding": "6.6.140" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.90" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.32" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.0.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1dc005775fb5b3f86464406452b17364f85581d3" }, { "url": "https://git.kernel.org/stable/c/d0802a8877d730260d4af4dd4e0b6cde7e0e593f" }, { "url": "https://git.kernel.org/stable/c/a6d5563ba1f03a049561cd347574613167294e8d" }, { "url": "https://git.kernel.org/stable/c/5c3e8ebad0c9e2354ddfa8f2148dc4f70a3b4bd1" }, { "url": "https://git.kernel.org/stable/c/2444eb0ec8283f4a3845eb7febad378476e1ba3c" } ], "title": "drm/amdgpu/vcn4: Prevent OOB reads when parsing IB", "x_generator": { "engine": "bippy-1.2.0" } } } }