rdesktop through 1.9.0 contains a heap out-of-bounds read vulnerability in process_plane() in bitmap.c that allows malicious RDP servers to crash clients by sending malformed 32 bpp compressed bitmaps. Attackers can declare a large bitmap geometry with a short compressed body in bitmap update PDUs or bitmap cache orders, causing unbounded reads past the receive buffer and denial of service.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 2
- StatusReceived → DeferredNVD modified 2026-10-19 21:14
- First seenCVSS 7.1NVD modified 2026-10-19 14:17
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 7
- https://github.com/rdesktop/rdesktop/blob/v1.9.0/bitmap.c
- https://github.com/rdesktop/rdesktop/issues/436
- https://github.com/rdesktop/rdesktop/pull/437
- https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-read
- https://www.vulncheck.com/advisories/rdesktop-through-1.9.0-heap-out-of-bounds-read-via-process-plane
- https://github.com/rdesktop/rdesktop/issues/436
- https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-read