{"id":"CVE-2026-63853","title":"drm/amdgpu/vcn: set no_user_fence for VCN v4.0 enc ring","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn: set no_user_fence for VCN v4.0 enc ring\n\nVCN encoder and decoder rings do not support 64-bit user fence writes,\nreject CS submissions with user fences.\n…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 8da1170a16e4d4b49fa07d1f75ad480847ff7eca < 1286b6872de0aee1feeeaa6dbac86369806de9a5","Linux >= 8da1170a16e4d4b49fa07d1f75ad480847ff7eca < 6bdd2ed6458d35c368fbe9550a4d7f342abd3a92","Linux >= 8da1170a16e4d4b49fa07d1f75ad480847ff7eca < 51f694221047c84fa185be98210eb2c354ffb8c6","Linux 5.19"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:32:17.901838Z"},"published":"2026-07-19","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:42:07.860Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63853","references":[{"url":"https://git.kernel.org/stable/c/1286b6872de0aee1feeeaa6dbac86369806de9a5"},{"url":"https://git.kernel.org/stable/c/6bdd2ed6458d35c368fbe9550a4d7f342abd3a92"},{"url":"https://git.kernel.org/stable/c/51f694221047c84fa185be98210eb2c354ffb8c6"}],"tags":["cve.org"],"epss":0.00173,"epssPercentile":0.06315,"ingestedAt":"2026-10-16T17:24:46.759Z","slug":"CVE-2026-63853","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn: set no_user_fence for VCN v4.0 enc ring\n\nVCN encoder and decoder rings do not support 64-bit user fence writes,\nreject CS submissions with user fences.\n\n(cherry picked from commit fd852c048b46f9825e904a4f3f4538fe9d8827d9)\n\n## Affected\n\n- `Linux >= 8da1170a16e4d4b49fa07d1f75ad480847ff7eca < 1286b6872de0aee1feeeaa6dbac86369806de9a5`\n- `Linux >= 8da1170a16e4d4b49fa07d1f75ad480847ff7eca < 6bdd2ed6458d35c368fbe9550a4d7f342abd3a92`\n- `Linux >= 8da1170a16e4d4b49fa07d1f75ad480847ff7eca < 51f694221047c84fa185be98210eb2c354ffb8c6`\n- `Linux 5.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}