{"schemaVersion":3,"id":"CVE-2026-54241","aliases":["UBUNTU-CVE-2026-54241","DEBIAN-CVE-2026-54241"],"status":"published","duplicateOf":null,"title":null,"description":"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 the sample adaptive offset input-buffer size, allowing a crafted HEVC stream with large dimensions and 16-bit luma samples to cause an integer overflow, an undersized allocation, and an out-of-bounds heap read that may expose heap data in decoded output or crash the decoder. Version 1.1.1 contains a patch.","dates":{"published":"2026-09-11T21:21:59.190Z","modified":"2026-09-14T16:15:30.052Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.4,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":5.6,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":5.6,"impact":8.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00393,"percentile":0.32022,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.15500000000000003,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00238},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00393,"percentile":0.32022}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00238,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00393,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00393,"percentile":0.32022}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-122","name":"Heap-based Buffer Overflow","description":"A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/122.html"},{"id":"CWE-190","name":"Integer Overflow or Wraparound","description":"The product performs a calculation that can\n         produce an integer overflow or wraparound when the logic\n         assumes that the resulting value will always be larger than\n         the original value. This occurs when an integer value is\n         incremented to a value that is too large to store in the\n         associated representation. When this occurs, the value may\n         become a very small or negative number.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/190.html"}],"affected":[{"vendor":"debian","product":"libde265","name":"libde265","label":"libde265","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libde265","purlType":"deb","versions":[{"text":"< 1.0.11-1+deb12u3","noFixRecorded":false,"fixedIn":null},{"text":"< 1.0.15-1+deb13u1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.1.1-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.0.11-1+deb12u3 | < 1.0.15-1+deb13u1 | < 1.1.1-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libde265","name":"libde265","label":"libde265","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libde265","purlType":"deb","versions":[{"text":"< 1.0.2-2ubuntu0.16.04.1~esm6","noFixRecorded":false,"fixedIn":null},{"text":"< 1.0.2-2ubuntu0.18.04.1~esm6","noFixRecorded":false,"fixedIn":null},{"text":"< 1.0.4-1ubuntu0.4+esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 1.0.8-1ubuntu0.3+esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 1.0.15-1ubuntu0.1","noFixRecorded":false,"fixedIn":null},{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1.0.16-1ubuntu0.1~esm1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.0.2-2ubuntu0.16.04.1~esm6 | < 1.0.2-2ubuntu0.18.04.1~esm6 | < 1.0.4-1ubuntu0.4+esm2 | < 1.0.8-1ubuntu0.3+esm2 | < 1.0.15-1ubuntu0.1 | All versions (No fix recorded) | < 1.0.16-1ubuntu0.1~esm1","eol":null,"hubHref":null},{"vendor":"strukturag","product":"libde265","name":"libde265","label":"libde265","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.1.1","eol":null,"hubHref":"/vendor/strukturag/libde265"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/strukturag/libde265/security/advisories/GHSA-j2qq-x2xq-g9wr","label":"github.com/strukturag/libde265/security/advisories/GHSA-j2qq-x2xq-g9wr","hostname":"github.com","tags":["X Refsource CONFIRM","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-54241","label":"ubuntu.com/security/CVE-2026-54241","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-54241","label":"www.cve.org/CVERecord?id=CVE-2026-54241","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8573-1","label":"ubuntu.com/security/notices/USN-8573-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-54241","label":"security-tracker.debian.org/tracker/CVE-2026-54241","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0420","USN-8573-1"],"duplicates":[],"related":["USN-8573-1"]},"timeline":[{"kind":"published","date":"2026-09-11T21:21:59.190Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-14T16:15:30.052Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T17:01:19.329Z","stale":false,"partial":false}}