CVE-2026-112277

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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

19 Oct 2026, 20:17

Type	Values Removed	Values Added
References	~~() https://github.com/rdesktop/rdesktop/issues/436 -~~	() https://github.com/rdesktop/rdesktop/issues/436 -
References	~~() https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-read -~~	() https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-read -

19 Oct 2026, 14:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-19 14:17

Updated : 2026-10-19 21:14

NVD link : CVE-2026-112277

Mitre link : CVE-2026-112277

CVE.ORG link : CVE-2026-112277

JSON object : View

Products Affected

No product.

CWE

CWE-125

Out-of-bounds Read

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