# CVE-2026-62292

## Summary

- **CVE ID:** CVE-2026-62292
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-125
- **Published:** Aug 18, 2026
- **Last Modified:** Sep 14, 2026

## Description

libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.1, a crafted uncompressed HEIF image using generic zlib unci full-item compression can crash an application that decodes an advertised tile with heif_image_handle_decode_image_tile(). In libheif/codecs/uncompressed/unc_decoder.cc, unc_decoder::fetch_tile_data() computes a large tile offset and unc_decoder::get_compressed_image_data_uncompressed() validates it with range_start_offset plus range_size. For the last advertised tile (4095, 4095), the addition can wrap to zero, bypass the bounds check, and pass an invalid source pointer and a one-terabyte length to memcpy. The observed result is an out-of-bounds read and process crash; opening the file alone does not trigger the issue because tile decoding is required. This issue is fixed in version 1.23.1.

## Affected Products

- strukturag — libheif (>= 1.19.0, < 1.23.1)

## References

- [CNA](https://github.com/strukturag/libheif/security/advisories/GHSA-73p7-m7gg-w2jv)
- [CNA](https://github.com/strukturag/libheif/commit/089a809bf6bed1abae102d5e97b6bb8c4f53b515)
- [CNA](https://github.com/strukturag/libheif/releases/tag/v1.23.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.45%
- **EPSS Percentile:** 38.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._