{"id":"CVE-2026-88376","aliases":["EUVD-2026-86318","GHSA-p8mj-xj67-6v9f"],"status":"published","title":"Bento4 1.6.0.0 contains an integer underflow vulnerability in AP4_AvccAtom::Create() and...","description":"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 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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.0039,"percentile":0.33537,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-191"],"published":"2026-09-24T00:00:00Z","modified":"2026-09-24T21:33:46Z","references":[{"url":"https://github.com/axiomatic-systems/Bento4/issues/1091","tags":["exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88376"},{"url":"https://github.com/advisories/GHSA-p8mj-xj67-6v9f"}],"sources":{"cve":[{"id":"CVE-2026-88376","description":"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 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.","status":"published","published":"2026-09-24T00:00:00Z","modified":"2026-09-24T18:13:40.395Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T13:41:53.237769Z"}],"euvd":[{"id":"EUVD-2026-86318","description":"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 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.","status":"published","published":"2026-09-24T00:00:00Z","modified":"2026-09-24T18:13:40Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T17:27:56.686358Z"}],"ghsa":[{"id":"GHSA-p8mj-xj67-6v9f","title":"Bento4 1.6.0.0 contains an integer underflow vulnerability in AP4_AvccAtom::Create() and...","description":"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 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.","status":"published","published":"2026-09-24T18:31:27Z","modified":"2026-09-24T21:33:46Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T15:12:24.174061Z"}],"nvd":[{"id":"CVE-2026-88376","description":"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 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.","status":"published","published":"2026-09-24T17:17:07.313Z","modified":"2026-09-24T21:08:55.03Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T14:12:51.036099Z"}]}}