CVE-2026-112279
mediumrdesktop 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 v…
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/rdesktop/rdesktop/blob/v1.9.0/orders.c disclosure@vulncheck.com
- https://github.com/rdesktop/rdesktop/issues/436 disclosure@vulncheck.com
- https://github.com/rdesktop/rdesktop/pull/437 disclosure@vulncheck.com
- https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-read disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/rdesktop-through-1.9.0-heap-out-of-bounds-read-via-pr... disclosure@vulncheck.com
- https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-read 134c704f-9b21-4f2e-91b3-4a467353bcc0