SB20260120202 - Multiple vulnerabilities in libheif

Description

This security bulletin contains information about 2 vulnerabilities.

1) NULL pointer dereference (CVE-ID: CVE-2025-43966)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to NULL pointer dereference within the ImageItem_iden() function in image-items/iden.cc. A remote attacker can pass a specially crafted file to the application and perform a denial of service attack. 

2) Out-of-bounds read (CVE-ID: CVE-2026-84449)

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

CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

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

The vulnerability exists due to an out-of-bounds read in Op_RGB24_32_to_YCbCr::convert_colorspace when encoding an image and converting RGB data to YCbCr. A remote attacker can supply a crafted image with extreme dimensions to trigger a crash and cause a denial of service.

The issue results in a read memory access error and segmentation fault during image encoding.

Remediation

Install update from vendor's website.

References

• https://github.com/strukturag/libheif/commit/b38555387e4b5dcf036fe45b0c440aca19b7b69c
• https://github.com/strukturag/libheif/compare/v1.19.5...v1.19.6
• https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq