{"id":"CVE-2026-31571","title":"drm/i915: Unlink NV12 planes earlier","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915: Unlink NV12 planes earlier\n\nunlink_nv12_plane() will clobber parts of the plane state\npotentially already set up by plane_atomic_check(), so we\nmust make sure…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 6a01df2f1b2a3b29721143729a3feff816bc0083 < 70e2eb91cb6310a3508439f6f2539dfffa0abf77","Linux >= 6a01df2f1b2a3b29721143729a3feff816bc0083 < 12f3b6cbab8fbeb95097685b40f0147406cf9746","Linux >= 6a01df2f1b2a3b29721143729a3feff816bc0083 < bfa71b7a9dc6b5b8af157686e03308291141d00c","Linux 6.15"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:39:14.635829Z"},"published":"2026-04-24","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:45:08.323Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31571","references":[{"url":"https://git.kernel.org/stable/c/70e2eb91cb6310a3508439f6f2539dfffa0abf77"},{"url":"https://git.kernel.org/stable/c/12f3b6cbab8fbeb95097685b40f0147406cf9746"},{"url":"https://git.kernel.org/stable/c/bfa71b7a9dc6b5b8af157686e03308291141d00c"}],"tags":["cve.org"],"epss":0.00121,"epssPercentile":0.01897,"ingestedAt":"2026-11-05T23:41:31.966Z","slug":"CVE-2026-31571","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915: Unlink NV12 planes earlier\n\nunlink_nv12_plane() will clobber parts of the plane state\npotentially already set up by plane_atomic_check(), so we\nmust make sure not to call the two in the wrong order.\nThe problem happens when a plane previously selected as\na Y plane is now configured as a normal plane by user space.\nplane_atomic_check() will first compute the proper plane\nstate based on the userspace request, and unlink_nv12_plane()\nlater clears some of the state.\n\nThis used to work on account of unlink_nv12_plane() skipping\nthe state clearing based on the plane visibility. But I removed\nthat check, thinking it was an impossible situation. Now when\nthat situation happens unlink_nv12_plane() will just WARN\nand proceed to clobber the state.\n\nRather than reverting to the old way of doing things, I think\nit's more clear if we unlink the NV12 planes before we even\ncompute the new plane state.\n\n(cherry picked from commit 017ecd04985573eeeb0745fa2c23896fb22ee0cc)\n\n## Affected\n\n- `Linux >= 6a01df2f1b2a3b29721143729a3feff816bc0083 < 70e2eb91cb6310a3508439f6f2539dfffa0abf77`\n- `Linux >= 6a01df2f1b2a3b29721143729a3feff816bc0083 < 12f3b6cbab8fbeb95097685b40f0147406cf9746`\n- `Linux >= 6a01df2f1b2a3b29721143729a3feff816bc0083 < bfa71b7a9dc6b5b8af157686e03308291141d00c`\n- `Linux 6.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}