CVE-2026-3950
low
CVSS v3
3.3
CVSS v2
1.7
VIR risk
3.3
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
Exploit likelihood
34%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-3950.html
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-3950
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | affected | |
| debian | sid | affected | |
| debian | trixie | fixed | 0 |
| sles | affected | |
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
Verify integrity in audit chain (admin only). AS-IS.