CVE-2026-32739
mediumpriority · track · 0EPSS 0.003 · 25 %ileEURUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (10)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
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references (7)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2026-32739cnnvd
- https://github.com/strukturag/libheif/releasesPatchcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2026-32739cnnvd
- https://github.com/strukturag/libheif/releases/tag/v1.22.0enisa_euvd
- https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8cenisa_euvd
- https://github.com/strukturag/libheif/releases/tag/v1.22.0Release Notesnvd
- https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8cExploitVendor Advisorynvd
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