CVE-2026-3949

NameCVE-2026-3949
DescriptionA 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libheif (PTS)bullseye1.11.0-1vulnerable
bullseye (security)1.11.0-1+deb11u2vulnerable
bookworm, bookworm (security)1.15.1-1+deb12u1vulnerable
trixie1.19.8-1vulnerable
forky, sid1.21.2-3vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libheifsource(unstable)(unfixed)

Notes

https://github.com/strukturag/libheif/issues/1712
https://github.com/strukturag/libheif/commit/b97c8b5f198b27f375127cd597a35f2113544d03

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