CVE-2026-3949

Description

A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdec_push_data2 of the file libheif/plugins/decoder_vvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called b97c8b5f198b27f375127cd597a35f2113544d03. It is advisable to implement a patch to correct this issue.

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

References

• https://github.com/biniamf/pocs/tree/main/libheif_vvdec
• https://github.com/strukturag/libheif/
• https://github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03
• https://github.com/strukturag/libheif/issues/1712
• https://github.com/strukturag/libheif/issues/1712#issuecomment-3947938531
• https://vuldb.com/?ctiid.350381
• https://vuldb.com/?id.350381
• https://vuldb.com/?submit.765979
• https://security-tracker.debian.org/tracker/CVE-2026-3949
• https://www.suse.com/security/cve/CVE-2026-3949.html

CWEs

CWE-119 CWE-125