rdesktop up to 1.9.0 Bitmap Cache orders.c process_raw_bmpcache bpp out-of-bounds

Summaryinfo

A vulnerability has been found in rdesktop up to 1.9.0 and classified as problematic. Affected is the function process_raw_bmpcache of the file orders.c of the component Bitmap Cache. Performing a manipulation of the argument bpp results in out-of-bounds. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is known as CVE-2026-112278. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in rdesktop up to 1.9.0. This affects the function process_raw_bmpcache of the file orders.c of the component Bitmap Cache. The manipulation of the argument bpp with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on availability. The summary by CVE is:

rdesktop through 1.9.0 contains a heap out-of-bounds read vulnerability in process_raw_bmpcache() in orders.c that allows malicious RDP servers to crash clients. Attackers can send a raw bitmap cache order declaring large width, height, and bpp values with a tiny payload, causing memcpy() to read past the receive buffer and crash the client.

It is possible to read the advisory at hackmd.io. This vulnerability is uniquely identified as CVE-2026-112278 since 10/19/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• rdesktop

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9.0

License

• open-source

Support

• end of life

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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