CVE-2026-84444 libheif - Buffer Overflow

libheif < 1.23.2 with WITH_UNCOMPRESSED_CODEC enabled contains a heap buffer overflow caused by missing component size checks in heif_context_add_image_tile, letting attackers cause memory corruption, exploit requires crafted HEIF/AVIF files.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.48% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Update to version 1.23.2 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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