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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Rdesktop
  • Rdesktop

No data.

No data.

References
Link Providers
https://github.com/rdesktop/rdesktop/blob/v1.9.0/bitmap.c cve-icon cve-icon cve-icon
https://github.com/rdesktop/rdesktop/issues/436 cve-icon cve-icon cve-icon cve-icon
https://github.com/rdesktop/rdesktop/pull/437 cve-icon cve-icon cve-icon
https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-read cve-icon cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-112277 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-112277 cve-icon
https://www.vulncheck.com/advisories/rdesktop-through-1.9.0-heap-out-of-bounds-read-via-process-plane cve-icon cve-icon cve-icon
History

Tue, 20 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Mon, 19 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 19 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
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.
Title rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_plane
First Time appeared Rdesktop
Rdesktop rdesktop
Weaknesses CWE-125
CPEs cpe:2.3:a:rdesktop:rdesktop:*:*:*:*:*:*:*:*
Vendors & Products Rdesktop
Rdesktop rdesktop
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-19T13:55:23.436Z

Updated: 2026-10-19T19:28:48.290Z

Reserved: 2026-10-19T13:25:29.594Z

Link: CVE-2026-112277

cve-icon Vulnrichment

Updated: 2026-10-19T19:28:09.427Z

cve-icon NVD

Status : Deferred

Published: 2026-10-19T14:17:05.663

Modified: 2026-10-19T21:14:14.150

Link: CVE-2026-112277

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-19T13:55:23Z

Links: CVE-2026-112277 - Bugzilla