7.7 High

libheif 1.18.0 before 1.23.3 contains a heap-based buffer overflow vulnerability in uncdecodermixedinterleave::processTile() that allows…

CVE-2026-120208

libheif 1.18.0 before 1.23.3 contains a heap-based buffer overflow vulnerability in uncdecodermixedinterleave::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.

Assessment

CVSS: 7.7 (v4.0)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 31 October 2026
Last updated: 31 October 2026
Affected: strukturag
Assigner: VulnCheck

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

At the source

EUVD (ENISA)

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