{"id":"CVE-2026-88376","title":"Bento4 1.6.0.0 contains an integer underflow vulnerability in AP4_AvccAtom::Create() and AP4_HvccAtom::Create()","summary":"Bento4 1.6.0.0 contains an integer underflow vulnerability in AP4_AvccAtom::Create() and AP4_HvccAtom::Create(). A specially crafted MP4 file containing an avcC or hvcC atom with a declared size smaller than the atom header size can caus…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-191"],"published":"2026-09-24","updated":"2026-09-24","sourceUpdated":"2026-09-24T21:08:55.030","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88376","references":[{"url":"https://github.com/axiomatic-systems/Bento4/issues/1091","label":"cve@mitre.org"},{"url":"https://github.com/axiomatic-systems/Bento4/issues/1091","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-24T18:12:59.862454Z"},"ingestedAt":"2026-09-24T16:47:15.849Z","slug":"CVE-2026-88376","body":"## Overview\n\nBento4 1.6.0.0 contains an integer underflow vulnerability in AP4_AvccAtom::Create() and AP4_HvccAtom::Create(). A specially crafted MP4 file containing an avcC or hvcC atom with a declared size smaller than the atom header size can cause the payload-size calculation to wrap to a large unsigned value. The resulting invalid buffer allocation and copy operations can cause application termination, leading to denial of service.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":210330,"id":"CVE-2026-88376","ts":1790275824599,"field":"exploit_available","old":"false","new":"true"},{"seq":210329,"id":"CVE-2026-88376","ts":1790275824599,"field":"cvss","old":null,"new":"7.5"},{"seq":210328,"id":"CVE-2026-88376","ts":1790275824599,"field":"severity","old":"none","new":"high"}]}