libheif: libheif 1.18.0 before 1.23.3 contains a heap-based buffer overflow vulnerability in unc_decoder_mixed_interleave::pro...
CVE-2026-120208 is fixed in libheif on 1 platform, first by DEBIAN-CVE-2026-120208, released October 31, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libheif · Debian 13.5 (trixie) | 1.23.4-1~deb13u1 | DEBIAN-CVE-2026-120208 | Oct 31, 2026 |
| libheif · Debian 14 | 1.23.3-1 | DEBIAN-CVE-2026-120208 | Oct 31, 2026 |
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