CVE-2026-112277
rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_plane
- State
- Published
- Severity
- 7.1 High
- Published
- Oct 19, 2026
- Updated
- Oct 19, 2026
- Reserved
- Oct 19, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | 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 | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
rdesktoprdesktop |
|
References
- https://hackmd.io/@haindpwn/rdesktop-bitmap-decompress-oob-readthird-party-advisory
- https://github.com/rdesktop/rdesktop/issues/436issue-tracking
- https://github.com/rdesktop/rdesktop/pull/437patchissue-tracking
- https://github.com/rdesktop/rdesktop/blob/v1.9.0/bitmap.ctechnical-description
- VulnCheck Advisory: rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_planethird-party-advisory
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