{"id":"CVE-2026-33165","summary":"heap out-of-bounds write in libde265 1.0.16","details":"libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a crafted HEVC bitstream causes an out-of-bounds heap write confirmed by AddressSanitizer. The trigger is a stale ctb_info.log2unitSize after an SPS change where PicWidthInCtbsY and PicHeightInCtbsY stay constant but Log2CtbSizeY changes, causing set_SliceHeaderIndex to index past the allocated image metadata array and write 2 bytes past the end of a heap allocation. This issue has been patched in version 1.0.17.","aliases":["GHSA-653q-9f73-8hvg"],"modified":"2026-04-12T20:14:09.469734Z","published":"2026-03-20T20:32:36.603Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33165.json","cwe_ids":["CWE-787"],"cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/strukturag/libde265/releases/tag/v1.0.17"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33165.json"},{"type":"ADVISORY","url":"https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33165"},{"type":"FIX","url":"https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/strukturag/libde265","events":[{"introduced":"0"},{"fixed":"c7891e412106130b83f8e8ea8b7f907e9449b658"}]},{"type":"GIT","repo":"https://github.com/strukturag/libde265","events":[{"introduced":"0"},{"fixed":"f3d916c8e63e510bda1f9cf5e8710259c22afece"}]}],"versions":["v0.1","v0.2","v0.3","v0.4","v0.5","v1.0.0","v1.0.10","v1.0.11","v1.0.12","v1.0.13","v1.0.14","v1.0.15","v1.0.16","v1.0.3","v1.0.4","v1.0.5","v1.0.6","v1.0.7","v1.0.8","v1.0.9"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33165.json","vanir_signatures":[{"id":"CVE-2026-33165-388c898b","signature_version":"v1","source":"https://github.com/strukturag/libde265/commit/f3d916c8e63e510bda1f9cf5e8710259c22afece","target":{"function":"VideoWidget::paintEvent","file":"sherlock265/VideoWidget.cc"},"signature_type":"Function","digest":{"length":564,"function_hash":"224189621832908547208584845959293867245"},"deprecated":false},{"id":"CVE-2026-33165-50c38bf6","signature_version":"v1","source":"https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658","target":{"function":"de265_image::alloc_image","file":"libde265/image.cc"},"signature_type":"Function","digest":{"length":4831,"function_hash":"195047020611183857418363623154680870808"},"deprecated":false},{"id":"CVE-2026-33165-6ee60a4c","signature_version":"v1","source":"https://github.com/strukturag/libde265/commit/f3d916c8e63e510bda1f9cf5e8710259c22afece","target":{"function":"VideoWidget::VideoWidget","file":"sherlock265/VideoWidget.cc"},"signature_type":"Function","digest":{"length":364,"function_hash":"327840637841273794815898644878905505991"},"deprecated":false},{"id":"CVE-2026-33165-73024c15","signature_version":"v1","source":"https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658","target":{"file":"libde265/image.h"},"signature_type":"Line","digest":{"threshold":0.9,"line_hashes":["236828189941766798442377242372046442362","225445787122119077097501329935817878011","91354529657960417714522614430811168962","48516769875290610935738941394660969093"]},"deprecated":false},{"id":"CVE-2026-33165-99af71a4","signature_version":"v1","source":"https://github.com/strukturag/libde265/commit/f3d916c8e63e510bda1f9cf5e8710259c22afece","target":{"file":"sherlock265/VideoWidget.cc"},"signature_type":"Line","digest":{"threshold":0.9,"line_hashes":["24195985884818460783815628466886685969","147038544006205557352957683921935214158","332270579816490930149395567689058003278","261987140283495801479336438506181096998","434014289267642594433253264005132899","168652729852070854314972564615697156958","118537600665570856582955531051773423212","331797459368371019932686990456084375128","130059418393864323628047821926512668","52533368177343838076000847856234591642","281675411347226717154703759322655818114","41100540083638509927396741802487875496","241996784243828715112683621079685224511","289735231494140392821617290262824326673","97950285867730060465213641024424361723","91325657800151498268561226358569129618","176049146906645793711834568023294815278","26560489141746959188457840323248191688","288193650944767960777594909763098798178"]},"deprecated":false},{"id":"CVE-2026-33165-afbb2704","signature_version":"v1","source":"https://github.com/strukturag/libde265/commit/f3d916c8e63e510bda1f9cf5e8710259c22afece","target":{"file":"sherlock265/VideoDecoder.cc"},"signature_type":"Line","digest":{"threshold":0.9,"line_hashes":["156570059363990044612634730938499588619","18700694985350976804673429355869064680","50316390665775045091248204107304896162","326227675731134023503142758311502438721"]},"deprecated":false},{"id":"CVE-2026-33165-cc1a07d8","signature_version":"v1","source":"https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658","target":{"file":"libde265/image.cc"},"signature_type":"Line","digest":{"threshold":0.9,"line_hashes":["55107895575511270586946282014563420965","165701253944460469670462727591671503745","234470541237275200845216201204699525684","194684926476513426613514766238747828829","1626002732004932894331150908614568922"]},"deprecate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