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CVE-2026-112278— rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_raw_bmpcache

Quick assessment

Affected
rdesktop rdesktop
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

rdesktop 1.9.0 及更早版本在 orders.c 文件的 process_raw_bmpcache() 函数中存在堆越界读取漏洞。该漏洞允许恶意的 RDP 服务器通过发送包含超大宽度、高度和每像素位数（bpp）值但实际载荷极小的原始位图缓存指令，触发 memcpy() 函数读取接收缓冲区之外的数据，从而导致客户端崩溃。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
rdesktop rdesktop ≤ 1.9.0 affected
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I. Basic Information for CVE-2026-112278

Vulnerability Information
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Vulnerability Title
rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_raw_bmpcache
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rdesktop rdesktop 0 ~ 1.9.0 -

II. Public POCs for CVE-2026-112278

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III. Intelligence Information for CVE-2026-112278

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Patches & Fixes for CVE-2026-112278 (1)

Vendor Advisories for CVE-2026-112278 (1)

Security Blog Posts for CVE-2026-112278 (1)

Same Patch Batch · rdesktop · 2026-10-19 · 3 CVEs total

CVE-2026-112279 6.5 MEDIUM rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_bmpcache2
CVE-2026-112277 6.5 MEDIUM rdesktop through 1.9.0 Heap Out-of-Bounds Read via process_plane

IV. Related Vulnerabilities

Same product: rdesktop
Same vendor: rdesktop
Same weakness: CWE-125

V. Comments for CVE-2026-112278

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