{"id":"CVE-2026-32740","summary":"libheif: Heap-Buffer-Overflow Write in Grid Tile Chroma Compositing","details":"libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and prior contain a heap-buffer-overflow (write) vulnerability in the grid tile compositing, allowing an attacker to write 64 bytes of fully attacker-controlled data past the end of a chroma plane heap allocation by crafting a HEIF/AVIF file with a 1×4 grid of odd-height tiles. The overflow is triggered during normal image decoding with default build configuration. The written bytes are chroma (Cb/Cr) pixel values from the attacking tile, giving the attacker full control over the overflow content. This issue has been fixed in version 1.22.0.","aliases":["GHSA-frfr-f3vg-2g6j"],"modified":"2026-07-08T08:13:16.961320Z","published":"2026-05-19T19:22:07.743Z","related":["SUSE-SU-2026:22153-1","SUSE-SU-2026:2622-1","openSUSE-SU-2026:10878-1","openSUSE-SU-2026:20974-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-787"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32740.json"},"references":[{"type":"WEB","url":"https://github.com/strukturag/libheif/releases/tag/v1.22.0"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32740.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-32740"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32740.json"},{"type":"ADVISORY","url":"https://github.com/strukturag/libheif/security/advisories/GHSA-frfr-f3vg-2g6j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32740"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2479969"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/strukturag/libheif","events":[{"introduced":"0"},{"fixed":"0c81a846b7401dbdb7118afd0761057f21e43511"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.22.0"}],"cpe":"cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*","source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"]}}],"versions":["v1.21.2","v1.21.1","v1.21.0","v1.20.1","v1.20.0","v1.19.5","v1.19.4","v1.19.3","v1.19.2","v1.19.1","v1.19.0","v1.18.0","v1.18.0-rc1","v1.17.6","v1.17.5","v1.17.4","v1.17.3","v1.17.2","v1.17.1","v1.17.0","v1.16.2","v1.16.1","v1.16.0","v1.15.2","v1.15.1","v1.15.0","v1.14.2","v1.14.1","v1.14.0","v1.13.0","v1.12.0","v1.11.0","v1.10.0","v1.9.1","v1.9.0","v1.8.0","v1.7.0","v1.3.2","v1.3.1","v1.3.0","v1.2.0","v1.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32740.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}