A heap-based buffer overflow issue was discovered in libjpeg-turbo in h2v2_merged_upsample_internal() function of jdmrgext.c file. The vulnerability can only be exploited with 12-bit data precision for which the range of the sample data type exceeds the valid sample range, hence, an attacker could craft a 12-bit lossless JPEG image that contains out-of-range 12-bit samples. An application attempting to decompress such image using merged upsampling would lead to segmentation fault or buffer overflows, causing an application to crash.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade libjpeg-turbo | Mar 26, 2024 | May 25, 2023 |
| Microsoft Windows | — | 2026-02 Cumulative Update for Microsoft Windows Server 2022, version 23H2 (KB5075897) | Feb 10, 2026 | Feb 10, 2026 |
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