{"schemaVersion":3,"id":"CVE-2026-84449","aliases":["UBUNTU-CVE-2026-84449","DEBIAN-CVE-2026-84449","openSUSE-SU-2026:11921-1"],"status":"published","duplicateOf":null,"title":null,"description":"libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.19.6, Op_RGB24_32_to_YCbCr::convert_colorspace() stores image-plane strides in an integer width that can overflow for extremely large RGB images created through heif_image_create() and heif_image_add_plane(). The resulting wrapped stride causes the conversion loop in libheif/color-conversion/rgb2yuv.cc to compute an invalid input pointer and read beyond the allocated interleaved plane while heif_context_encode_image() performs RGB-to-YCbCr conversion. This can crash the encoding process. This issue is fixed in version 1.19.6.","dates":{"published":"2026-09-18T16:03:28.532Z","modified":"2026-09-22T14:52:30.772Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":3.7,"severity":"low","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":3.7,"severity":"low","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":3.7,"severity":"low","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":5.6,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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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":"libheif","name":"libheif","label":"libheif","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libheif","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1.19.7-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 1.19.7-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libheif","name":"libheif","label":"libheif","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libheif","purlType":"deb","versions":[{"text":"< 1.1.0-2ubuntu0.1~esm5","noFixRecorded":false,"fixedIn":null},{"text":"< 1.6.1-1ubuntu0.1~esm5","noFixRecorded":false,"fixedIn":null},{"text":"< 1.12.0-2ubuntu0.1~esm5","noFixRecorded":false,"fixedIn":null},{"text":"< 1.17.6-1ubuntu4.9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.1.0-2ubuntu0.1~esm5 | < 1.6.1-1ubuntu0.1~esm5 | < 1.12.0-2ubuntu0.1~esm5 | < 1.17.6-1ubuntu4.9","eol":null,"hubHref":null},{"vendor":"opensuse","product":"libheif&distro=openSUSE Tumbleweed","name":"libheif","label":"libheif&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/libheif&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 1.23.5-2.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.23.5-2.1","eol":null,"hubHref":null},{"vendor":"strukturag","product":"libheif","name":"libheif","label":"libheif","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.19.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.19.6","eol":null,"hubHref":"/vendor/strukturag/libheif"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq","label":"github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq","hostname":"github.com","tags":["X Refsource CONFIRM","REPORT"]},{"url":"https://github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b22fbe3","label":"github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b22fbe3","hostname":"github.com","tags":["X Refsource MISC","REPORT"]},{"url":"https://github.com/strukturag/libheif/releases/tag/v1.19.6","label":"github.com/strukturag/libheif/releases/tag/v1.19.6","hostname":"github.com","tags":["X Refsource MISC","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-84449","label":"ubuntu.com/security/CVE-2026-84449","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-84449","label":"www.cve.org/CVERecord?id=CVE-2026-84449","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8846-1","label":"ubuntu.com/security/notices/USN-8846-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-84449","label":"security-tracker.debian.org/tracker/CVE-2026-84449","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-84449","label":"www.suse.com/security/cve/CVE-2026-84449","hostname":"www.suse.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:22052-1","USN-8846-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:22052-1","USN-8846-1"]},"timeline":[{"kind":"published","date":"2026-09-18T16:03:28.532Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-22T14:52:30.772Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":15,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T19:55:07.829Z","stale":false,"partial":false}}