CVE-2026-67304: FreeRDP before 3.29.0 NULL Dereference via smartcard cleanup

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-08-01 · updated 2026-09-08
Weakness: CWE-476

Description

FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard device control request cleanup when reader-state decoding fails. Attackers can send malformed smartcard IRP requests with non-zero cReaders and truncated reader-state data to crash the process via null pointer access in free_reader_states functions.

Affected products

FreeRDP: before 3.29.0 — fixed in 3.29.0

How to fix

Upgrade to a fixed version: FreeRDP 3.29.0. Check the vendor advisory for mitigations.

References

https://github.com/FreeRDP/FreeRDP/commit/1cc783d4c78bd2f66d3a8582dfe70a663d141444
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-78jj-45vh-jpm5
https://www.vulncheck.com/advisories/freerdp-before-null-dereference-via-smartcard-cleanup
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-78jj-45vh-jpm5

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