SB2026062682 - Out-of-bounds read in libheif

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-49271)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in unc_decoder::get_compressed_image_data_uncompressed when parsing a crafted HEIF file with wrapped icef compressed-unit offsets and sizes. A remote attacker can supply a specially crafted HEIF file to cause a denial of service.

The issue is reached when the cmpC compressed unit type is not image_tile, and user interaction is required to decode the crafted media.

Remediation

Install update from vendor's website.

References

• https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf
• https://github.com/strukturag/libheif