{"id":"CVE-2026-88377","published":"2026-09-24T17:17:07.433","lastModified":"2026-09-29T03:17:20.920","description":"Bento4 1.6.0.0 contains an integer underflow vulnerability in the avcC and hvcC configuration atom parsers. A specially crafted MP4 file containing an atom with a declared size smaller than AP4_ATOM_HEADER_SIZE can cause AP4_AvccAtom::Create() or AP4_HvccAtom::Create() to underflow the payload-size calculation. The resulting oversized buffer operation can cause invalid or NULL pointers to be passed to the AP4_DataBuffer copy path, resulting in application termination and denial of service.","cvssScore":6.2,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-191"],"vendors":[],"products":[],"references":[{"url":"https://github.com/axiomatic-systems/Bento4/issues/1092","tags":[]},{"url":"https://github.com/axiomatic-systems/Bento4/issues/1092","tags":[]}],"exploitRefs":[{"url":"https://github.com/axiomatic-systems/Bento4/issues/1092","tags":[]},{"url":"https://github.com/axiomatic-systems/Bento4/issues/1092","tags":[]}],"hasPoc":true,"ai":null}