{"id":"CVE-2026-46204","state":"PUBLISHED","title":"drm/amdgpu/vcn4: Prevent OOB reads when parsing IB","description":"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.","publishedAt":"2026-05-28T09:40:21.933Z","updatedAt":"2026-10-30T12:26:07.773Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"92724364702fd12d99f441a4af11d9c8bcd52217","versionType":"git"},{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"1dc005775fb5b3f86464406452b17364f85581d3","versionType":"git"},{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"d0802a8877d730260d4af4dd4e0b6cde7e0e593f","versionType":"git"},{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"a6d5563ba1f03a049561cd347574613167294e8d","versionType":"git"},{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"5c3e8ebad0c9e2354ddfa8f2148dc4f70a3b4bd1","versionType":"git"},{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"2444eb0ec8283f4a3845eb7febad378476e1ba3c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.90","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.32","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.9","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c"]}],"references":["https://git.kernel.org/stable/c/92724364702fd12d99f441a4af11d9c8bcd52217","https://git.kernel.org/stable/c/1dc005775fb5b3f86464406452b17364f85581d3","https://git.kernel.org/stable/c/d0802a8877d730260d4af4dd4e0b6cde7e0e593f","https://git.kernel.org/stable/c/a6d5563ba1f03a049561cd347574613167294e8d","https://git.kernel.org/stable/c/5c3e8ebad0c9e2354ddfa8f2148dc4f70a3b4bd1","https://git.kernel.org/stable/c/2444eb0ec8283f4a3845eb7febad378476e1ba3c"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-30T12:44:04.813Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46204.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46204","state":"PUBLISHED","datePublished":"2026-05-28T09:40:21.933Z","dateUpdated":"2026-10-30T12:26:07.773Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.104Z"},"containers":{"cna":{"title":"drm/amdgpu/vcn4: Prevent OOB reads when parsing IB","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"92724364702fd12d99f441a4af11d9c8bcd52217","versionType":"git"},{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"1dc005775fb5b3f86464406452b17364f85581d3","versionType":"git"},{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"d0802a8877d730260d4af4dd4e0b6cde7e0e593f","versionType":"git"},{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"a6d5563ba1f03a049561cd347574613167294e8d","versionType":"git"},{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"5c3e8ebad0c9e2354ddfa8f2148dc4f70a3b4bd1","versionType":"git"},{"version":"0b15205c7325dc20b7da0068307670d222d66949","status":"affected","lessThan":"2444eb0ec8283f4a3845eb7febad378476e1ba3c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.90","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.32","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.9","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/92724364702fd12d99f441a4af11d9c8bcd52217"},{"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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:26:07.773Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.191"},{"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-46204","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-16T15:21:08.264110Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","type":"CWE","description":"CWE-125 Out-of-bounds Read"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T19:36:55.076Z"}}]}}}