{"id":"CVE-2026-63847","state":"PUBLISHED","title":"drm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit 3216a7f4e2642bda5fd14f57586e835ae9202587)","publishedAt":"2026-07-19T14:04:40.248Z","updatedAt":"2026-10-30T12:27:13.915Z","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":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"c9e367e6e630e1655184ca886a9290bfe8cb30a9","versionType":"git"},{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"63691e396105611173072ad548fc2b68831ecf23","versionType":"git"},{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"4d96e3cbfc66e4d66ea0096bde858e28ab62da00","versionType":"git"},{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"3a96fee676fc0caf08f03ad915bec6fcd144d551","versionType":"git"},{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"694fe016969c5e5a24b9e0ef7c1307eedec8ddf8","versionType":"git"},{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"79405e774ede411c6b47ed41c651e40b92de64a2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.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_5.c"]}],"references":["https://git.kernel.org/stable/c/c9e367e6e630e1655184ca886a9290bfe8cb30a9","https://git.kernel.org/stable/c/63691e396105611173072ad548fc2b68831ecf23","https://git.kernel.org/stable/c/4d96e3cbfc66e4d66ea0096bde858e28ab62da00","https://git.kernel.org/stable/c/3a96fee676fc0caf08f03ad915bec6fcd144d551","https://git.kernel.org/stable/c/694fe016969c5e5a24b9e0ef7c1307eedec8ddf8","https://git.kernel.org/stable/c/79405e774ede411c6b47ed41c651e40b92de64a2"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-30T12:46:06.359Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63847.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63847","state":"PUBLISHED","datePublished":"2026-07-19T14:04:40.248Z","dateUpdated":"2026-10-30T12:27:13.915Z","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 v2.5 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 v2.5 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit 3216a7f4e2642bda5fd14f57586e835ae9202587)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"c9e367e6e630e1655184ca886a9290bfe8cb30a9","versionType":"git"},{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"63691e396105611173072ad548fc2b68831ecf23","versionType":"git"},{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"4d96e3cbfc66e4d66ea0096bde858e28ab62da00","versionType":"git"},{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"3a96fee676fc0caf08f03ad915bec6fcd144d551","versionType":"git"},{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"694fe016969c5e5a24b9e0ef7c1307eedec8ddf8","versionType":"git"},{"version":"14f43e8f88c57bbeaed3d05f13efab733f5e2338","status":"affected","lessThan":"79405e774ede411c6b47ed41c651e40b92de64a2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.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_5.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c9e367e6e630e1655184ca886a9290bfe8cb30a9"},{"url":"https://git.kernel.org/stable/c/63691e396105611173072ad548fc2b68831ecf23"},{"url":"https://git.kernel.org/stable/c/4d96e3cbfc66e4d66ea0096bde858e28ab62da00"},{"url":"https://git.kernel.org/stable/c/3a96fee676fc0caf08f03ad915bec6fcd144d551"},{"url":"https://git.kernel.org/stable/c/694fe016969c5e5a24b9e0ef7c1307eedec8ddf8"},{"url":"https://git.kernel.org/stable/c/79405e774ede411c6b47ed41c651e40b92de64a2"}],"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 - Exploitation requires issuing DRM_IOCTL_AMDGPU_CS against /dev/dri/renderD* on a system with an affected AMD Instinct GPU (MI100/MI200); this is a local ioctl path, not reachable over the network.\nAC:L - An attacker with render-node access can deterministically submit a JPEG-ring command buffer (AMDGPU_HW_IP_VCN_JPEG) with an AMDGPU_CHUNK_ID_FENCE chunk; no race or special system state is required beyond the vulnerable hardware being present.\nPR:L - The amdgpu_cs_ioctl entry point requires only DRM render-client access (DRM_AUTH|DRM_RENDER_ALLOW), which is granted to unprivileged local users in the render/video group or cloud GPU tenants with device access—not root or CAP_SYS_ADMIN.\nUI:N - Exploitation is fully programmatic via ioctl submission and does not require any action from another user or administrator.\nS:U - The corrupting GPU fence write is issued within the attacker's own DRM/GPU context and VM; impact remains within the same security authority and does not constitute a demonstrated VM escape or IOMMU boundary bypass.\nC:H - The malformed 64-bit user fence write on unsupported JPEG hardware causes GPU-initiated memory corruption at an attacker-chosen address, which can be leveraged for arbitrary memory disclosure beyond a bounded leak.\nI:H - The vulnerability gives the attacker a GPU DMA write primitive to user-specified GPU-mapped memory, enabling arbitrary data modification and potential further exploitation such as privilege escalation.\nA:H - Triggering an unsupported 64-bit fence operation on the JPEG engine can cause GPU faults, driver hangs, or kernel oops/panic, impacting system availability."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:27:13.915Z"},"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-2026-63847","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:31:59.376671Z"}}}],"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":"2026-10-19T20:07:50.816Z"}}]}}}