{"id":"CVE-2026-63852","title":"drm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 enc ring","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 enc ring\n\nVCN encoder and decoder rings do not support 64-bit user fence writes,\nreject CS submissions with user fences…","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 >= b889ef4ac98837838c38f7b9f72bba2f33ee367d < c12a5d35033c0640c57c10d7111c010c7b9c2c8e","Linux >= b889ef4ac98837838c38f7b9f72bba2f33ee367d < 387b7c7667bd5c53549350ddad866d2fcf75a529","Linux >= b889ef4ac98837838c38f7b9f72bba2f33ee367d < 9076a83e5adefd10dc5c967c7b8bde601c4c512a","Linux >= b889ef4ac98837838c38f7b9f72bba2f33ee367d < 0177ac6141c8857130cf365369c74dee7b6b1f7f","Linux >= b889ef4ac98837838c38f7b9f72bba2f33ee367d < 4532b52b34e4e4310386e6fdf6a643368599f522","Linux 6.5"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:32:15.463568Z"},"published":"2026-07-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T20:07:51.529Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63852","references":[{"url":"https://git.kernel.org/stable/c/c12a5d35033c0640c57c10d7111c010c7b9c2c8e"},{"url":"https://git.kernel.org/stable/c/387b7c7667bd5c53549350ddad866d2fcf75a529"},{"url":"https://git.kernel.org/stable/c/9076a83e5adefd10dc5c967c7b8bde601c4c512a"},{"url":"https://git.kernel.org/stable/c/0177ac6141c8857130cf365369c74dee7b6b1f7f"},{"url":"https://git.kernel.org/stable/c/4532b52b34e4e4310386e6fdf6a643368599f522"}],"tags":["cve.org"],"epss":0.00175,"epssPercentile":0.06973,"ingestedAt":"2026-10-16T17:24:46.759Z","slug":"CVE-2026-63852","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 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 ff1a5a125c5a70c328806b9bc01d7d942cf3f9aa)\n\n## Affected\n\n- `Linux >= b889ef4ac98837838c38f7b9f72bba2f33ee367d < c12a5d35033c0640c57c10d7111c010c7b9c2c8e`\n- `Linux >= b889ef4ac98837838c38f7b9f72bba2f33ee367d < 387b7c7667bd5c53549350ddad866d2fcf75a529`\n- `Linux >= b889ef4ac98837838c38f7b9f72bba2f33ee367d < 9076a83e5adefd10dc5c967c7b8bde601c4c512a`\n- `Linux >= b889ef4ac98837838c38f7b9f72bba2f33ee367d < 0177ac6141c8857130cf365369c74dee7b6b1f7f`\n- `Linux >= b889ef4ac98837838c38f7b9f72bba2f33ee367d < 4532b52b34e4e4310386e6fdf6a643368599f522`\n- `Linux 6.5`\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":[]}