SerenityOS up to 3d83e4509fd20d7438e1ae8470ffe668c136229c LibGfx BMPLoader.cpp decode_bmp_pixel_data height integer overflow

Summaryinfo

A vulnerability described as problematic has been identified in SerenityOS up to 3d83e4509fd20d7438e1ae8470ffe668c136229c. Affected by this issue is the function decode_bmp_pixel_data of the file Userland/Libraries/LibGfx/ImageFormats/BMPLoader.cpp of the component LibGfx. The manipulation of the argument height results in integer overflow. This vulnerability was named CVE-2026-94030. The attack may be performed from remote. In addition, an exploit is available. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed. It is best practice to apply a patch to resolve this issue. This was reproducible with a minimal 55-byte PoC via the standard image-decode fuzz target but evidence for an actual exploitable defect is thin.

Detailsinfo

A vulnerability was found in SerenityOS up to 3d83e4509fd20d7438e1ae8470ffe668c136229c. It has been classified as problematic. Affected is the function decode_bmp_pixel_data of the file Userland/Libraries/LibGfx/ImageFormats/BMPLoader.cpp of the component LibGfx. The manipulation of the argument height with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-94030. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept. This was reproducible with a minimal 55-byte PoC via the standard image-decode fuzz target but evidence for an actual exploitable defect is thin.

Applying the patch 007041bb2dd6d140c9e707caddfb0a49ecf96469 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Name

• SerenityOS

Version

• 3d83e4509fd20d7438e1ae8470ffe668c136229c

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Accepted

• Submit #945895: SerenityOS SerenityOS LibGfx >= d76ad23 Integer Overflow (by cz_seuer)

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