CVE-2026-32739
Description
libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequence file causes an infinite loop in Box_stts::get_sample_duration(), consuming 100% CPU indefinitely with zero progress, leading to DoS. The loop has no iteration limit or timeout and is triggered during file open (parsing) - before any user interaction or image decoding. The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring. This issue has been fixed in version 1.22.0.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-32739.html
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-32739
Vendor advisory: security-advisories@github.com — https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c
Vendor advisory: security-advisories@github.com — https://github.com/strukturag/libheif/releases/tag/v1.22.0
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | affected | |
| debian | bullseye | affected | |
| debian | forky | affected | |
| debian | sid | affected | |
| debian | trixie | affected | |
| sles | affected | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| struktur | libheif | {"endExcluding":"1.22.0"} | 1.22.0 |
References
CWEs
CWE-835
Verify integrity in audit chain (admin only). AS-IS.