Medium severity · published Oct 19, 2026
CVE-2026-112277
rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_plane
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
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)0.4% · higher than 33% 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-2026-112277
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-112277
github.com
https://github.com/rdesktop/rdesktop/blob/v1.9.0/bitmap.c
github.com
https://github.com/rdesktop/rdesktop/issues/436
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-plane
More from rdesktop
9.8
CVE-2018-20180
rdesktop versions up to and including v1.8.3 contain an Integer Underflow that leads to a Heap-Based Buffer Overflow in the function rdpsnddbg_process() and results in memory…
9.8
CVE-2018-20182
rdesktop versions up to and including v1.8.3 contain a Buffer Overflow over the global variables in the function seamless_process_line() that results in memory corruption and…
9.8
CVE-2018-20181
rdesktop versions up to and including v1.8.3 contain an Integer Underflow that leads to a Heap-Based Buffer Overflow in the function seamless_process() and results in memory…
9.8
CVE-2018-20177
rdesktop versions up to and including v1.8.3 contain an Integer Overflow that leads to a Heap-Based Buffer Overflow in the function rdp_in_unistr() and results in memory…
9.8
CVE-2018-20179
rdesktop versions up to and including v1.8.3 contain an Integer Underflow that leads to a Heap-Based Buffer Overflow in the function lspci_process() and results in memory…