CVE-2026-3950
Description
A vulnerability was identified in strukturag libheif up to 1.21.2. This impacts the function Track::load of the file libheif/sequences/track.cc of the component stsz/stts. The manipulation leads to out-of-bounds read. The attack needs to be performed locally. The exploit is publicly available and might be used. Applying a patch is the recommended action to fix this issue. The patch available is inofficial and not approved yet.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Mixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0 |
| sid | Affected | — |
| forky | Affected | — |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 0 |
References
- https://github.com/Niebelungen-D/pocs/tree/main/heif_dec_sequence_chunk_idx_oob
- https://github.com/strukturag/libheif/
- https://github.com/strukturag/libheif/issues/1715
- https://github.com/strukturag/libheif/pull/1721
- https://vuldb.com/?ctiid.350382
- https://vuldb.com/?id.350382
- https://vuldb.com/?submit.766431
- https://security-tracker.debian.org/tracker/CVE-2026-3950
- https://www.suse.com/security/cve/CVE-2026-3950.html
CWEs
CWE-119 CWE-125
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.