rdesktop up to 1.9.0 Bitmap Cache orders.c process_bmpcache2 out-of-bounds

Summaryinfo

A vulnerability was found in rdesktop up to 1.9.0. It has been classified as problematic. Affected by this issue is the function process_bmpcache2 of the file orders.c of the component Bitmap Cache. The manipulation leads to out-of-bounds. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is uniquely identified as CVE-2026-112279. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in rdesktop up to 1.9.0 and classified as problematic. This issue affects the function process_bmpcache2 of the file orders.c of the component Bitmap Cache. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. The summary by CVE is:

rdesktop through 1.9.0 contains a heap out-of-bounds read vulnerability in process_bmpcache2() in orders.c that allows malicious RDP servers to crash clients via crafted revision-2 bitmap cache orders. Attackers can send an uncompressed order with large width/height or an underflowing mode nibble and short payload, causing memcpy() reads past the receive buffer and denial of service.

The advisory is shared at hackmd.io. The identification of this vulnerability is CVE-2026-112279 since 10/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

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

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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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Entryinfo

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