{"schemaVersion":3,"id":"CVE-2026-49346","aliases":["UBUNTU-CVE-2026-49346","DEBIAN-CVE-2026-49346"],"status":"published","duplicateOf":null,"title":null,"description":"libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in `de265_image_get_buffer()` (`libde265/image.cc:128`). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent `fill_image()` call computes the real size using `size_t`, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue.","dates":{"published":"2026-06-19T20:12:14.958Z","modified":"2026-06-22T14:05:14.851Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.1,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","exploitability":7.2,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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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":"struktur","product":"libde265","name":"libde265","label":"libde265","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.1.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.1.0","eol":null,"hubHref":"/vendor/struktur/libde265"},{"vendor":"strukturag","product":"libde265","name":"libde265","label":"libde265","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.1.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.1.0","eol":null,"hubHref":"/vendor/strukturag/libde265"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86","label":"github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86","hostname":"github.com","tags":["X Refsource CONFIRM","REPORT","Exploit","Vendor Advisory"]},{"url":"https://github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8","label":"github.com/strukturag/libde265/commit/8a1b5cf212f78e1c77cb46eb5d56e492a9336eb8","hostname":"github.com","tags":["X Refsource MISC","Patch"]},{"url":"https://ubuntu.com/security/CVE-2026-49346","label":"ubuntu.com/security/CVE-2026-49346","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-49346","label":"www.cve.org/CVERecord?id=CVE-2026-49346","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-2026-49346","label":"security-tracker.debian.org/tracker/CVE-2026-49346","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":"2026-06-19T20:12:14.958Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-22T14:05:14.851Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":38,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T22:49:16.415Z","stale":false,"partial":false}}