CVE-2026-33995 | FreeRDP up to 3.24.1 kerberos.c kerberos_AcceptSecurityContext double free

VDB-354280 · CVE-2026-33995 · GCVE-0-2026-33995 FREERDP UP TO 3.24.1 KERBEROS.C KERBEROS_ACCEPTSECURITYCONTEXT DOUBLE FREE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.2 $0-$5k 1.73+ Summaryinfo A vulnerability labeled as problematic has been found in FreeRDP up to 3.24.1. This vulnerability affects the function kerberos_AcceptSecurityContext in the library winpr/libwinpr/sspi/Kerberos/kerberos.c. Executing a manipulation can lead to double free. This vulnerability is registered as CVE-2026-33995. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded. Detailsinfo A vulnerability has been found in FreeRDP up to 3.24.1 and classified as problematic. This vulnerability affects the function kerberos_AcceptSecurityContext in the library winpr/libwinpr/sspi/Kerberos/kerberos.c. The manipulation with an unknown input leads to a double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. As an impact it is known to affect availability. CVE summarizes: 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. The advisory is shared for download at github.com. This vulnerability was named CVE-2026-33995 since 03/24/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. Upgrading to version 3.24.2 eliminates this vulnerability. Productinfo Type Remote Access Software Name FreeRDP Version 3.24.0 3.24.1 License open-source Website Product: https://github.com/FreeRDP/FreeRDP/ CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 5.2 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 5.3 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Double free CWE: CWE-415 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: FreeRDP 3.24.2 Timelineinfo 03/24/2026 CVE reserved 03/30/2026 +6 days VulDB entry created 03/31/2026 +0 days Advisory disclosed 03/31/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-33995 (🔒) GCVE (CVE): GCVE-0-2026-33995 GCVE (VulDB): GCVE-100-354280 Entryinfo Created: 03/31/2026 00:21 Changes: 03/31/2026 00:21 (64) Complete: 🔍 Cache ID: 99:992:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸