CVE-2026-32739
The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring.
Does this matter?
Lower severity and a low EPSS score (0.32%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 0.32% probability · 25th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- struktur/libheif
- Source
- security-advisories@github.com
References
- https://github.com/strukturag/libheif/releases/tag/v1.22.0Release Notes
- https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8cExploit, Vendor Advisory
- https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8cExploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.