CVE-2026-62292: CWE-125: Out-of-bounds Read in strukturag libheif
CVE-2026-62292 is a high-severity out-of-bounds read vulnerability in the strukturag libheif library, affecting versions from 1.19.0 up to but not including 1.23.1. The flaw occurs when decoding a crafted uncompressed HEIF image with generic zlib unci full-item compression, specifically when decoding the last advertised tile. An integer overflow in tile offset calculation bypasses bounds checks, causing an invalid memory read and potential application crash. The issue is fixed in version 1.23.1.
AI Analysis
Technical Summary
The vulnerability in libheif arises from an integer overflow in the function unc_decoder::fetch_tile_data() when handling the last advertised tile (4095, 4095) of a crafted uncompressed HEIF image using generic zlib unci full-item compression. The addition of range_start_offset and range_size wraps to zero, bypassing bounds validation in unc_decoder::get_compressed_image_data_uncompressed(), leading to a call to memcpy with an invalid source pointer and an excessively large length (one terabyte). This results in an out-of-bounds read and process crash. The flaw requires decoding the tile with heif_image_handle_decode_image_tile() and does not trigger simply by opening the file. The vulnerability is resolved in libheif version 1.23.1.
Potential Impact
Successful exploitation causes an out-of-bounds read that leads to a process crash, resulting in denial of service for applications using vulnerable libheif versions. There is no indication of code execution or data corruption beyond the crash. The vulnerability can be triggered by processing a specially crafted HEIF image that decodes the last advertised tile.
Mitigation Recommendations
Upgrade libheif to version 1.23.1 or later, where this vulnerability is fixed. No other mitigations are indicated or necessary as the issue is resolved by the official patch.
CVE-2026-62292: CWE-125: Out-of-bounds Read in strukturag libheif
Description
CVE-2026-62292 is a high-severity out-of-bounds read vulnerability in the strukturag libheif library, affecting versions from 1.19.0 up to but not including 1.23.1. The flaw occurs when decoding a crafted uncompressed HEIF image with generic zlib unci full-item compression, specifically when decoding the last advertised tile. An integer overflow in tile offset calculation bypasses bounds checks, causing an invalid memory read and potential application crash. The issue is fixed in version 1.23.1.
CVSS v4.0
Score 8.7high
Affected software
strukturag
libheif
pkg:github/strukturag/libheifRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in libheif arises from an integer overflow in the function unc_decoder::fetch_tile_data() when handling the last advertised tile (4095, 4095) of a crafted uncompressed HEIF image using generic zlib unci full-item compression. The addition of range_start_offset and range_size wraps to zero, bypassing bounds validation in unc_decoder::get_compressed_image_data_uncompressed(), leading to a call to memcpy with an invalid source pointer and an excessively large length (one terabyte). This results in an out-of-bounds read and process crash. The flaw requires decoding the tile with heif_image_handle_decode_image_tile() and does not trigger simply by opening the file. The vulnerability is resolved in libheif version 1.23.1.
Potential Impact
Successful exploitation causes an out-of-bounds read that leads to a process crash, resulting in denial of service for applications using vulnerable libheif versions. There is no indication of code execution or data corruption beyond the crash. The vulnerability can be triggered by processing a specially crafted HEIF image that decodes the last advertised tile.
Mitigation Recommendations
Upgrade libheif to version 1.23.1 or later, where this vulnerability is fixed. No other mitigations are indicated or necessary as the issue is resolved by the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-13T18:37:08.488Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a84d00bc6e8be0332c73b05
Added to database: 08/18/2026, 21:35:07 UTC
Last enriched: 09/11/2026, 10:32:26 UTC
Last updated: 10/02/2026, 02:46:05 UTC
Views: 66
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