What’s Vulnerable › Vulnerabilities

CVE-2023-39355: FreeRDP Use-After-Free in RDPGFX_CMDID_RESETGRAPHICS

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-08-31 · updated 2026-06-17
• Weakness: CWE-416

Description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Versions of FreeRDP on the 3.x release branch before beta3 are subject to a Use-After-Free in processing `RDPGFX_CMDID_RESETGRAPHICS` packets. If `context->maxPlaneSize` is 0, `context->planesBuffer` will be freed. However, without updating `context->planesBuffer`, this leads to a Use-After-Free exploit vector. In most environments this should only result in a crash. This issue has been addressed in version 3.0.0-beta3 and users of the beta 3.x releases are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

• Debian Linux: 10.0
• FreeRDP: 3.0.0-beta1, 3.0.0-beta2

References

• https://github.com/FreeRDP/FreeRDP/commit/d6f9d33a7db0b346195b6a15b5b99944ba41beee
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hvwj-vmg6-2f5h
• https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
• https://security.gentoo.org/glsa/202401-16
• https://github.com/FreeRDP/FreeRDP/commit/d6f9d33a7db0b346195b6a15b5b99944ba41beee
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hvwj-vmg6-2f5h
• https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
• https://security.gentoo.org/glsa/202401-16

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