Vulnerability Description
libheif 1.18.0 before 1.23.3 contains a heap-based buffer overflow vulnerability in unc_decoder_mixed_interleave::processTile() that allows attackers to write out of bounds by supplying chroma components with unequal bit depths. Attackers can craft a HEIF file declaring, for example, 16-bit Cb and 8-bit Cr to trigger file-controlled heap writes past the Cr plane, potentially achieving code execution in image-processing pipelines.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/strukturag/libheif/blob/v1.23.2/libheif/codecs/uncompressed/u
- https://github.com/strukturag/libheif/commit/9d3cd91d7b1c8c68deef6d06057ab956bcb
- https://github.com/strukturag/libheif/releases/tag/v1.23.3
- https://github.com/strukturag/libheif/security/advisories/GHSA-x8r2-mggj-j6wr
- https://www.vulncheck.com/advisories/libheif-1.18.0-before-1.23.3-heap-buffer-ov
FAQ
What is CVE-2026-120208?
CVE-2026-120208 is a vulnerability with a CVSS score of 7.5 (HIGH). libheif 1.18.0 before 1.23.3 contains a heap-based buffer overflow vulnerability in unc_decoder_mixed_interleave::processTile() that allows attackers to write out of bounds by supplying chroma compone...
How severe is CVE-2026-120208?
CVE-2026-120208 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-120208?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.