{"id":"CVE-2026-63848","state":"PUBLISHED","title":"drm/amdgpu/jpeg: set no_user_fence for JPEG v2.0 ring","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/jpeg: set no_user_fence for JPEG v2.0 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit 96179da0c6b059eb31706a0abe8dd6381c533143)","publishedAt":"2026-07-19T14:04:40.798Z","updatedAt":"2026-10-30T12:27:14.972Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"08a5f07da71006f4309724715f99c6920c762034","versionType":"git"},{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"f675801889b265634aefd30aa4503fc2b9e6ce1c","versionType":"git"},{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"2e216c2ff159b2eb1da6e9c716d727efc73c64b5","versionType":"git"},{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"b41248d1c18384835f6532e68592ee07605da283","versionType":"git"},{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"41c4f3f68a343d62bd352a95ace93a11c4ad92ed","versionType":"git"},{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"e5f612dc91650561fe2b5b76dd6d2898ec9ad480","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","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/jpeg_v2_0.c"]}],"references":["https://git.kernel.org/stable/c/08a5f07da71006f4309724715f99c6920c762034","https://git.kernel.org/stable/c/f675801889b265634aefd30aa4503fc2b9e6ce1c","https://git.kernel.org/stable/c/2e216c2ff159b2eb1da6e9c716d727efc73c64b5","https://git.kernel.org/stable/c/b41248d1c18384835f6532e68592ee07605da283","https://git.kernel.org/stable/c/41c4f3f68a343d62bd352a95ace93a11c4ad92ed","https://git.kernel.org/stable/c/e5f612dc91650561fe2b5b76dd6d2898ec9ad480"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-30T12:46:06.359Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63848.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63848","state":"PUBLISHED","datePublished":"2026-07-19T14:04:40.798Z","dateUpdated":"2026-10-30T12:27:14.972Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T07:54:57.016Z"},"containers":{"cna":{"title":"drm/amdgpu/jpeg: set no_user_fence for JPEG v2.0 ring","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/jpeg: set no_user_fence for JPEG v2.0 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit 96179da0c6b059eb31706a0abe8dd6381c533143)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"08a5f07da71006f4309724715f99c6920c762034","versionType":"git"},{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"f675801889b265634aefd30aa4503fc2b9e6ce1c","versionType":"git"},{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"2e216c2ff159b2eb1da6e9c716d727efc73c64b5","versionType":"git"},{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"b41248d1c18384835f6532e68592ee07605da283","versionType":"git"},{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"41c4f3f68a343d62bd352a95ace93a11c4ad92ed","versionType":"git"},{"version":"6ac27241106bc946bd50032f4cd96899c6a6fe69","status":"affected","lessThan":"e5f612dc91650561fe2b5b76dd6d2898ec9ad480","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","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/jpeg_v2_0.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/08a5f07da71006f4309724715f99c6920c762034"},{"url":"https://git.kernel.org/stable/c/f675801889b265634aefd30aa4503fc2b9e6ce1c"},{"url":"https://git.kernel.org/stable/c/2e216c2ff159b2eb1da6e9c716d727efc73c64b5"},{"url":"https://git.kernel.org/stable/c/b41248d1c18384835f6532e68592ee07605da283"},{"url":"https://git.kernel.org/stable/c/41c4f3f68a343d62bd352a95ace93a11c4ad92ed"},{"url":"https://git.kernel.org/stable/c/e5f612dc91650561fe2b5b76dd6d2898ec9ad480"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerable code is reached only through DRM_IOCTL_AMDGPU_CS on an AMDGPU render node (/dev/dri/renderD*), requiring a local ioctl to submit a command buffer with AMDGPU_CHUNK_ID_FENCE to the JPEG v2.0 decode ring (AMDGPU_HW_IP_VCN_JPEG).\nAC:L - On affected VCN 2.0.x hardware with JPEG v2.0 (e.g. Navi/Vega20), an attacker fully controls CS submission parameters and can reliably trigger the unsupported 64-bit user fence path without races or conditions beyond attacker control.\nPR:L - DRM_IOCTL_AMDGPU_CS is gated by DRM_AUTH|DRM_RENDER_ALLOW, so any unprivileged local user with render-node access (typically render/video group membership) can reach the vulnerable path without root or init-namespace capabilities.\nUI:N - Exploitation requires only programmatic ioctl submission by the attacker; no victim interaction such as opening files, mounting filesystems, or clicking prompts is needed.\nS:U - The flaw enables GPU-initiated memory corruption within the attacker's own AMDGPU context/VM via the render node, which is a standard local kernel/GPU-driver privilege boundary rather than a cross-authority escape such as VM guest-to-host or IOMMU bypass.\nC:H - Submitting a 64-bit user fence to a JPEG ring that only supports 32-bit fence writes causes the hardware to perform misdirected or out-of-bounds GPU memory writes, providing a memory-corruption primitive that can be leveraged for information disclosure.\nI:H - The unsupported fence write gives the attacker a GPU-initiated arbitrary-write primitive at attacker-chosen GPU virtual addresses within their VM mappings, which is memory corruption exploitable for further integrity compromise or code execution.\nA:H - Incorrect fence handling on the JPEG decode ring can hang or fault the GPU, trigger driver error-recovery paths, and cause system-wide graphics disruption or kernel oops, constituting high availability impact."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:27:14.972Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-63848","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:32:04.759041Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","type":"CWE","description":"CWE-20 Improper Input Validation"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T20:07:50.950Z"}}]}}}