What’s Vulnerable › Vulnerabilities

CVE-2026-33995: FreeRDP: Possible double free in kerberos_AcceptSecurityContext

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-30 · updated 2026-06-17
• Weakness: CWE-415

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a double-free vulnerability in kerberos_AcceptSecurityContext() and kerberos_InitializeSecurityContextA() (WinPR, winpr/libwinpr/sspi/Kerberos/kerberos.c) can cause a crash in any FreeRDP clients on systems where Kerberos and/or Kerberos U2U is configured (Samba AD member, or krb5 for NFS). The crash is triggered during NLA connection teardown and requires a failed authentication attempt. This issue has been patched in version 3.24.2.

Affected products

• FreeRDP: before 3.24.2 — fixed in 3.24.2

How to fix

Upgrade to a fixed version: FreeRDP 3.24.2. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/commit/8078b8af1359055972e4fb2f509f543b69169391
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mv25-f4p2-5mxx

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