Medium severity · published Oct 19, 2026
CVE-2026-112278
rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_raw_bmpcache
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RD
rdesktop · rdesktop
through 1.9.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-112278
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-112278
github.com
https://github.com/rdesktop/rdesktop/blob/v1.9.0/orders.c
github.com
https://github.com/rdesktop/rdesktop/pull/437
hackmd.io
https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-read
www.vulncheck.com
https://www.vulncheck.com/advisories/rdesktop-through-1.9.0-heap-out-of-bounds-read-via-process-raw-bmpcache
hackmd.io
https://hackmd.io/@haindpwn/cve-2026-112277-112278-112279-rdesktop-bitmap-decompress-oob-read
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