CVE-2026-121955 FreeRDP before 3.32.2 Use-After-Free in Smartcard Emulation ReleaseContext

What is CVE-2026-121955?

CVE-2026-121955 is a high-severity vulnerability in FreeRDP, published on 4 Nov 2026.

Official description

FreeRDP before 3.32.2 contains a use-after-free vulnerability in Emulate_SCardReleaseContext that frees the emulated SCardContext before its worker thread is cancelled and joined. A malicious server can send ESTABLISHCONTEXT, a long-timeout GETSTATUSCHANGE, then RELEASECONTEXT smartcard IRPs to corrupt heap memory or crash clients using smartcard emulation.

Weakness: CWE-416

Which versions are affected by CVE-2026-121955?

It affects 1 product.

Products include FreeRDP.

How do I fix CVE-2026-121955?

Upgrade to a fixed version.

Is CVE-2026-121955 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-121955 exists.

Other vulnerabilities in FreeRDP

• CVE-2024-32658 FreeRDP ExtractRunLengthRegular* out of bound read Critical 9.8
• CVE-2024-32659 freerdp_image_copy out of bound read Critical 9.8
• CVE-2024-32039 FreeRDP Integer overflow & OutOfBound Write in clear_decompress_residual_data Critical 9.8
• CVE-2024-32041 FreeRDP OutOfBound Read in zgfx_decompress_segment Critical 9.8
• CVE-2024-32458 FreeRDP Out-Of-Bounds Read in planar_skip_plane_rle Critical 9.8

All FreeRDP vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-121955, GHSA-59q5-wg5w-gxp4, GHSA-983v-jp34-f3fm, UBUNTU-CVE-2026-121955.