{"id":"CVE-2026-63855","summary":"drm/amdgpu/vcn: set no_user_fence for VCN v2.5 enc/dec rings","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn: set no_user_fence for VCN v2.5 enc/dec rings\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 efc9dd5590894109bce9a0bfe1fa5592dd6b20b1)","modified":"2026-07-22T03:32:03.127200819Z","published":"2026-07-19T14:04:45.096Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63855.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2c6fb056567efb49f8674108b86088a1cfaa86d0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4f317863a3ab212a027d8c8c3cc3af4e3fb95704"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5a3c6f76cab164a5d803084908d7050f649ab7f9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/602d4c5872b25ddd4d82fb2025efb9a05b187bb3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8f0ea4524dc71c6c9ec97f2711f46e12f624140f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63855.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63855"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"28c17d72072b7ce5cc13a527dcbfc045cc995e7d"},{"fixed":"2c6fb056567efb49f8674108b86088a1cfaa86d0"},{"fixed":"8f0ea4524dc71c6c9ec97f2711f46e12f624140f"},{"fixed":"602d4c5872b25ddd4d82fb2025efb9a05b187bb3"},{"fixed":"5a3c6f76cab164a5d803084908d7050f649ab7f9"},{"fixed":"4f317863a3ab212a027d8c8c3cc3af4e3fb95704"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-63855.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.4.0"},{"fixed":"6.6.141"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.91"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.33"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-63855.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}