{"id":"CVE-2026-63856","summary":"drm/amdgpu/vcn: set no_user_fence for VCN v2.0 enc/dec rings","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn: set no_user_fence for VCN v2.0 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 e2b5499fca55f1a32960a311bbb62e35891eaf73)","modified":"2026-07-22T03:31:33.734703880Z","published":"2026-07-19T14:04:45.716Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63856.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5e777bc4cbe928ac0fd95e368fee1540f2ce4db2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8d80b293b41fcb5e9396db93e788b0f4ebcbafb7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ac06ce5cac9e711281585d09d00c6efcd9b86396"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c71aecae98e42dcf2baf462df50b3a2cf1a93fe4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f264019be80de79f84f464846451445923bffea0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63856.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63856"},{"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":"1b61de45dfaff00b627e47349a019658e39268b9"},{"fixed":"f264019be80de79f84f464846451445923bffea0"},{"fixed":"5e777bc4cbe928ac0fd95e368fee1540f2ce4db2"},{"fixed":"ac06ce5cac9e711281585d09d00c6efcd9b86396"},{"fixed":"c71aecae98e42dcf2baf462df50b3a2cf1a93fe4"},{"fixed":"8d80b293b41fcb5e9396db93e788b0f4ebcbafb7"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-63856.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.3.0"},{"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-2026-63856.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"}]}