PT-2026-41995 · Libheif+2 · Libheif+2

Elhananhaenel · CVE-2026-32738 · Published 2026-05-19 · Updated 2026-07-06

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions libheif versions prior to 1.22.0

Description An unsigned integer underflow occurs in the Chunk constructor when processing a crafted HEIF sequence file containing samples per chunk=0 in the stsc box. This causes all samples to map to an empty chunk, leading to a denial of service. A segmentation fault (SEGV), which is a null-page read, is triggered when the library attempts to access the first frame by reading from index 0 of an empty std::vector.

Recommendations Update to version 1.22.0.

Exploit

Fix

DoS

NULL Pointer Dereference

Out of bounds Read

Weakness Enumeration

CWE-476

CWE-125

Related Identifiers

CVE-2026-32738

ECHO-2807-9F4F-AD1F

GHSA-7F2H-CMPF-V9WW

OPENSUSE-SU-2026:10878-1

OPENSUSE-SU-2026:20974-1

SUSE-SU-2026:22153-1

SUSE-SU-2026:2622-1

USN-8454-1

Affected Products

Linuxmint

Ubuntu

Libheif

References · 79

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32738.json · Exploit
• 🔥 https://github.com/strukturag/libheif/security/advisories/GHSA-7f2h-cmpf-v9ww · Exploit
• https://osv.dev/vulnerability/ALPINE-CVE-2026-32738 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8454-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-32740 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-32738 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8454-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10878-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-32738 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-32739 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-41071 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-32738 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-32738 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:20974-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-13-CVE-2026-32738 · Vendor Advisory