Vulnerability · Published Jul 22, 2026 · Assigned by GitHub_M
CVE-2026-48029libheif: heap OOB read in ImageItem_Grid::decode_grid_tile via irot-induced tile-coordinate underflow
High 7.1
In plain English
A high-severity out-of-bounds read in libheif from strukturag. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.4%top 70.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.19.0 through 1.21.2 have a heap OOB read in ImageItem_Grid::decode_grid_tile via irot-induced tile-coordinate underflow. Version 1.22.0 fixes the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libheif | no fix listed | DEBIAN-CVE-2026-48029 |
| Debian:13 | libheif | 1.19.8-1+deb13u1 | DEBIAN-CVE-2026-48029 |
| Debian:14 | libheif | 1.23.1-1 | DEBIAN-CVE-2026-48029 |
| Ubuntu:25.10 | libheif | 1.20.2-1ubuntu0.6 | UBUNTU-CVE-2026-48029 |
| Ubuntu:26.04:LTS | libheif | 1.21.2-3ubuntu0.3 | UBUNTU-CVE-2026-48029 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| strukturag | libheif | >= 1.19.0, < 1.22.0 |
Weakness: CWE-125, CWE-191 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H