CVE-2026-120208

high

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.

References

https://www.vulncheck.com/advisories/libheif-1.18.0-before-1.23.3-heap-buffer-overflow-via-unci-mixed-interleave-decoder

https://github.com/strukturag/libheif/security/advisories/GHSA-x8r2-mggj-j6wr

https://github.com/strukturag/libheif/releases/tag/v1.23.3

https://github.com/strukturag/libheif/commit/9d3cd91d7b1c8c68deef6d06057ab956bcb0dfb9

https://github.com/strukturag/libheif/blob/v1.23.2/libheif/codecs/uncompressed/unc_decoder_mixed_interleave.cc#L95

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-114729

Details

Source: Mitre, NVD

Published: 2026-10-31

Updated: 2026-10-31

Risk Information

CVSS v2

Base Score: 7.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 7.7

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Severity: High