{"id":"CVE-2026-63849","title":"drm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 enc ring","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 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 >= 346492f30ce3581bf5324c4ae417eab8537dc998 < 081ef0e46c9cdd26c0db0ef721470393d36b6655","Linux >= 346492f30ce3581bf5324c4ae417eab8537dc998 < 5a4bffd67e94944ed3db26a959346cfb7fabaecd","Linux >= 346492f30ce3581bf5324c4ae417eab8537dc998 < 8f4954722eab88e10c4ea0c0d3b1269c31421d3a","Linux 6.14"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:32:07.985488Z"},"published":"2026-07-19","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:42:07.259Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63849","references":[{"url":"https://git.kernel.org/stable/c/081ef0e46c9cdd26c0db0ef721470393d36b6655"},{"url":"https://git.kernel.org/stable/c/5a4bffd67e94944ed3db26a959346cfb7fabaecd"},{"url":"https://git.kernel.org/stable/c/8f4954722eab88e10c4ea0c0d3b1269c31421d3a"}],"tags":["cve.org"],"epss":0.00173,"epssPercentile":0.06313,"ingestedAt":"2026-10-16T17:24:46.759Z","slug":"CVE-2026-63849","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 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 e16be95a2c3ee712b142cb27d2dca0b461181359)\n\n## Affected\n\n- `Linux >= 346492f30ce3581bf5324c4ae417eab8537dc998 < 081ef0e46c9cdd26c0db0ef721470393d36b6655`\n- `Linux >= 346492f30ce3581bf5324c4ae417eab8537dc998 < 5a4bffd67e94944ed3db26a959346cfb7fabaecd`\n- `Linux >= 346492f30ce3581bf5324c4ae417eab8537dc998 < 8f4954722eab88e10c4ea0c0d3b1269c31421d3a`\n- `Linux 6.14`\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":[]}