CVE-2026-23534

Name
CVE-2026-23534
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the ClearCodec bands decode path when crafted band coordinates allow writes past the end of the destination surface buffer. A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L878-L879
MISC https://github.com/FreeRDP/FreeRDP/blob/38514dfa5813aa945a86cfbcec279033f8394468/libfreerdp/codec/clear.c#L883-L884
MISC https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0
CONFIRM https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3frr-mp8w-4599

Match rules

CPE URI Source package Min version Max version
freerdp >= 0 < 3.21.0
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:* freerdp >= None < 3.21.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
freerdp edge-community 3.21.0-r0 Lindsay Zhou <i@lin.moe> fixed
freerdp edge-community 3.20.2-r0 Lindsay Zhou <i@lin.moe> possibly vulnerable
freerdp edge-community 3.20.0-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.20.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.18.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.16.0-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.16.0-r2 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.16.0-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.16.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.15.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.14.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.10.3-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.10.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 3.10.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 2.11.7-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 2.11.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 2.9.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 2.4.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
freerdp edge-community 2.2.0-r0 None possibly vulnerable
freerdp edge-community 2.1.2-r0 None possibly vulnerable
freerdp edge-community 2.0.0_rc4-r0 None possibly vulnerable
freerdp edge-community 2.0.0-r1 None possibly vulnerable
freerdp edge-community 2.0.0-r0 None possibly vulnerable
freerdp 3.23-community 3.18.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable