{"id":"CVE-2026-54240","title":"libde265 is an open source implementation of the h.265 video codec","summary":"libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.1.1 use signed 32-bit arithmetic to calculate pixel offsets, allowing a crafted HEVC stream with large image dimensions to trigger an integer overflo…","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","cwe":["CWE-190","CWE-787"],"vendor":"strukturag","product":"libde265","affected":["libde265 < 1.1.1"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T19:17:30.680","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54240","references":[{"url":"https://github.com/strukturag/libde265/security/advisories/GHSA-ccfw-29x7-rrx3","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"epss":0.00393,"epssPercentile":0.30643,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-14T18:37:02.738620Z"},"ingestedAt":"2026-09-14T11:11:19.877Z","slug":"CVE-2026-54240","body":"## Overview\n\nlibde265 is an open source implementation of the h.265 video codec. Versions prior to 1.1.1 use signed 32-bit arithmetic to calculate pixel offsets, allowing a crafted HEVC stream with large image dimensions to trigger an integer overflow and cause out-of-bounds heap reads or writes, potentially disclosing data, corrupting memory, or crashing the decoder. Version 1.1.1 contains a patch.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}