{"id":"RUSTSEC-2026-0456","summary":"Panic on an HEVC tile layout that does not match the active SPS","details":"An HEVC picture parameter set (PPS) stores explicit tile column widths and row\nheights computed against the sequence parameter set (SPS) active when it was\nparsed. A crafted stream can redefine that SPS afterwards, so that the tile sizes\nadd up to more than the picture. The decoder then indexed past its coding tree\nblock tables: Rust's bounds checks turned this into a panic, or the picture was\ndecoded wrongly. A panic aborts the decoding thread, or the whole process when\nbuilt with `panic = \"abort\"`. The crate forbids `unsafe` code, so there is no\nmemory corruption.\n\nAny application that decodes untrusted HEIC files or HEVC streams with\n`heifer-hevc-dec`, directly or through the `heifer` crate, is affected.\n\nThe flaw was corrected in 0.3.27 (commit\n[`71dfc67`](https://github.com/HarpeLm/Heifer/commit/71dfc67f1e3ae3c4b7e4cf633e83a26c94b06a92)):\na tile layout that does not match the picture size is rejected with\n`Error::Invalid` at decode time.","aliases":["GHSA-rcff-5x58-7w2p"],"modified":"2026-11-09T10:00:02.340396376Z","published":"2026-11-04T12:00:00Z","database_specific":{"license":"CC0-1.0"},"references":[{"type":"PACKAGE","url":"https://crates.io/crates/heifer-hevc-dec"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2026-0456.html"},{"type":"WEB","url":"https://github.com/HarpeLm/Heifer/commit/71dfc67f1e3ae3c4b7e4cf633e83a26c94b06a92"}],"affected":[{"package":{"name":"heifer-hevc-dec","ecosystem":"crates.io","purl":"pkg:cargo/heifer-hevc-dec"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.3.27"}]}],"ecosystem_specific":{"affects":{"os":[],"functions":[],"arch":[]},"affected_functions":null},"database_specific":{"categories":["denial-of-service"],"cvss":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","informational":null,"source":"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0456.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}