CVE-2026-120208 libheif - Buffer Overflow

libheif < 1.23.3 contains a heap-based buffer overflow caused by unequal bit depths in chroma components in unc_decoder_mixed_interleave::processTile(), letting attackers execute code via crafted HEIF files, exploit requires crafted file input.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
31 October 2026
Updated
1 November 2026
Weakness
CWE-122

Vendor fix

Update to version 1.23.3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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