CVE-2026-48029
libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.19.0 through 1.21.2 have a heap OOB read in ImageItem_Grid::decode_grid_tile via irot-induced tile-coordinate underflow. Version 1.22.0 fixes the issue.
CSIRTS triage
- What
- libheif has multiple vulnerabilities that could lead to denial of service or information disclosure.
- Who is affected
- Only Ubuntu 26.04 LTS deployments are affected.
- Urgency
- Remediation is urgent due to the potential for denial of service and information disclosure.
- Action
- Update to the latest version of libheif.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.
Advisory coverage (2)
- highCVE-2026-48029: libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.19.0 through 1.21.2 hav…nvd · 2026-07-22
- unknownUSN-8526-1: libheif vulnerabilitiesubuntu · 2026-07-09
External references
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