{"id":"CVE-2026-3949","summary":"strukturag libheif HEIF File decoder_vvdec.cc vvdec_push_data2 out-of-bounds","details":"A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdec_push_data2 of the file libheif/plugins/decoder_vvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called b97c8b5f198b27f375127cd597a35f2113544d03. It is advisable to implement a patch to correct this issue.","modified":"2026-08-12T16:23:57.767643Z","published":"2026-03-11T18:32:09.358Z","related":["SUSE-SU-2026:1660-1","SUSE-SU-2026:22153-1","SUSE-SU-2026:2622-1","openSUSE-SU-2026:10460-1","openSUSE-SU-2026:20974-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3949.json","cna_assigner":"VulDB","cwe_ids":["CWE-119","CWE-125"]},"references":[{"type":"WEB","url":"https://github.com/strukturag/libheif/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3949.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3949"},{"type":"ADVISORY","url":"https://vuldb.com/?id.350381"},{"type":"ADVISORY","url":"https://vuldb.com/?submit.765979"},{"type":"REPORT","url":"https://github.com/strukturag/libheif/issues/1712"},{"type":"REPORT","url":"https://github.com/strukturag/libheif/issues/1712#issuecomment-3947938531"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.350381"},{"type":"FIX","url":"https://github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03"},{"type":"EVIDENCE","url":"https://github.com/biniamf/pocs/tree/main/libheif_vvdec"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/strukturag/libheif","events":[{"introduced":"81b09baa38ac8654d34d0f8b7780c44addfc7893"},{"fixed":"b97c8b5f198b27f375127cd597a35f2113544d03"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"1.21.0"},{"last_affected":"1.21.0"},{"introduced":"1.21.1"},{"last_affected":"1.21.1"},{"introduced":"1.21.2"},{"last_affected":"1.21.2"}]}}],"versions":["1.21.0","1.21.1","1.21.2","v1.21.2","v1.21.1","v1.21.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3949.json","vanir_signatures_modified":"2026-08-12T16:23:57Z","vanir_signatures":[{"signature_version":"v1","source":"https://github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03","target":{"file":"libheif/plugins/decoder_vvdec.cc"},"deprecated":false,"digest":{"line_hashes":["241394016192530154728775493219794092134","306070744995062561529607612816830400187","222263289327577883699071857898995442826","95113494202903003317628323001320890145","306095758132309700395813887161949265853","330046478980160121851119960901217415066","291482973947041319417118209145053084229","93434688375480901107547632780894131127"],"threshold":0.9},"id":"CVE-2026-3949-35acf889","signature_type":"Line"},{"deprecated":false,"digest":{"function_hash":"125050619902725537773320484018886304502","length":549},"id":"CVE-2026-3949-a4f33640","signature_type":"Function","signature_version":"v1","source":"https://github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03","target":{"file":"libheif/plugins/decoder_vvdec.cc","function":"vvdec_push_data2"}}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"}]}