{"id":"CVE-2021-47659","title":"drm/plane: Move range check for format_count earlier","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/plane: Move range check for format_count earlier\n\nWhile the check for format_count > 64 in __drm_universal_plane_init()\nshouldn't be hit (it's a WARN_ON), in its cu…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < 4ab7e453a3ee88c274cf97bee9487ab92a66d313","Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < 1e29d829ad51d1472dd035487953a6724b56fc33","Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < b5cd108143513e4498027b96ec4710702d186f11","Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < 978e3d023256bfaf34a0033d40c94e8a8e70cf3c","Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < 787163d19bc3cdc6ca4b96223f62208534d1cf6b","Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < ad6dd7a2bac86118985c7b3426e175b9d3c1ec4f","Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < 4b674dd69701c2e22e8e7770c1706a69f3b17269","Linux 4.14"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:42:32.788551Z"},"published":"2025-02-26","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:49:35.497Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-47659","references":[{"url":"https://git.kernel.org/stable/c/4ab7e453a3ee88c274cf97bee9487ab92a66d313"},{"url":"https://git.kernel.org/stable/c/1e29d829ad51d1472dd035487953a6724b56fc33"},{"url":"https://git.kernel.org/stable/c/b5cd108143513e4498027b96ec4710702d186f11"},{"url":"https://git.kernel.org/stable/c/978e3d023256bfaf34a0033d40c94e8a8e70cf3c"},{"url":"https://git.kernel.org/stable/c/787163d19bc3cdc6ca4b96223f62208534d1cf6b"},{"url":"https://git.kernel.org/stable/c/ad6dd7a2bac86118985c7b3426e175b9d3c1ec4f"},{"url":"https://git.kernel.org/stable/c/4b674dd69701c2e22e8e7770c1706a69f3b17269"}],"tags":["cve.org"],"epss":0.00267,"epssPercentile":0.18982,"ingestedAt":"2026-11-05T22:38:31.561Z","slug":"CVE-2021-47659","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/plane: Move range check for format_count earlier\n\nWhile the check for format_count > 64 in __drm_universal_plane_init()\nshouldn't be hit (it's a WARN_ON), in its current position it will then\nleak the plane->format_types array and fail to call\ndrm_mode_object_unregister() leaking the modeset identifier. Move it to\nthe start of the function to avoid allocating those resources in the\nfirst place.\n\n## Affected\n\n- `Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < 4ab7e453a3ee88c274cf97bee9487ab92a66d313`\n- `Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < 1e29d829ad51d1472dd035487953a6724b56fc33`\n- `Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < b5cd108143513e4498027b96ec4710702d186f11`\n- `Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < 978e3d023256bfaf34a0033d40c94e8a8e70cf3c`\n- `Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < 787163d19bc3cdc6ca4b96223f62208534d1cf6b`\n- `Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < ad6dd7a2bac86118985c7b3426e175b9d3c1ec4f`\n- `Linux >= e6fc3b68558e4c6d8d160b5daf2511b99afa8814 < 4b674dd69701c2e22e8e7770c1706a69f3b17269`\n- `Linux 4.14`\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":0.1,"exploitation":0,"ransomware":0},"changes":[]}