CVE-2026-62292
libheif: Out-of-bounds read in uncompressed unci tile range slicing
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.
INFO
Published Date :
Aug. 18, 2026, 10:17 p.m.
Last Modified :
Oct. 22, 2026, 4:09 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update libheif to version 1.23.1 or later.
- Apply vendor patches if available.
- Rebuild affected applications with the patched library.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-62292.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-62292 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-62292
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-62292 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-62292 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 22, 2026
Action Type Old Value New Value Added Translation Title: libheif de strukturag, Description: libheif es un decodificador y codificador de formato de archivo HEIF y AVIF. Desde la versión 1.19.0 hasta la 1.23.1, una imagen HEIF sin comprimir manipulada que utiliza compresión genérica zlib unci de elemento completo puede provocar el bloqueo de una aplicación que decodifica un mosaico anunciado con heif_image_handle_decode_image_tile(). En libheif/codecs/uncompressed/unc_decoder.cc, unc_decoder::fetch_tile_data() calcula un gran desplazamiento de mosaico y unc_decoder::get_compressed_image_data_uncompressed() lo valida con range_start_offset más range_size. Para el último mosaico anunciado (4095, 4095), la suma puede desbordarse a cero, omitir la comprobación de límites y pasar un puntero de origen no válido y una longitud de un terabyte a memcpy. El resultado observado es una lectura fuera de límites y un bloqueo del proceso; abrir el archivo por sí solo no activa el problema porque se requiere la decodificación del mosaico. Este problema está solucionado en la versión 1.23.1. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 25, 2026
Action Type Old Value New Value Added Reference https://github.com/strukturag/libheif/security/advisories/GHSA-73p7-m7gg-w2jv Added SSVC {'id': 'CVE-2026-62292', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-25T01:42:28.393146Z'} -
New CVE Received by [email protected]
Aug. 18, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'strukturag', 'product': 'libheif', 'versions': [{'status': 'affected', 'version': '>= 1.19.0, < 1.23.1'}]}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-125 Added Reference https://github.com/strukturag/libheif/commit/089a809bf6bed1abae102d5e97b6bb8c4f53b515 Added Reference https://github.com/strukturag/libheif/releases/tag/v1.23.1 Added Reference https://github.com/strukturag/libheif/security/advisories/GHSA-73p7-m7gg-w2jv