CVE-2026-33995

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Source
https://cve.org/CVERecord?id=CVE-2026-33995
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-33995.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-33995
Aliases
  • GHSA-mv25-f4p2-5mxx
Downstream
Related
Published
2026-03-30T21:43:49.873Z
Modified
2026-05-30T05:47:33.628187Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
FreeRDP: Possible double free in kerberos_AcceptSecurityContext
Details

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a double-free vulnerability in kerberosAcceptSecurityContext() and kerberosInitializeSecurityContextA() (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.

Database specific 
{
    "cwe_ids": [
        "CWE-415"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33995.json",
    "cna_assigner": "GitHub_M",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "fixed": "3.24.2"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/freerdp/freerdp

Affected ranges

Type
GIT
Repo
https://github.com/freerdp/freerdp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8078b8af1359055972e4fb2f509f543b69169391
Database specific 
{
    "source": "REFERENCES"
}

Affected versions

1.*
1.0-beta1
1.0-beta2
1.0-beta4
1.0-beta5
1.0.0
1.0.1
1.1.0-beta+2013071101
1.1.0-beta1
1.1.0-beta1+android2
1.1.0-beta1+android3
1.1.0-beta1+android4
1.1.0-beta1+android5
1.1.0-beta1+ios1
1.1.0-beta1+ios2
1.1.0-beta1+ios3
1.1.0-beta1+ios4
1.2.0-beta1+android7
1.2.0-beta1+android9
2.*
2.0.0
2.0.0-beta1+android10
2.0.0-beta1+android11
2.0.0-rc0
2.0.0-rc1
2.0.0-rc2
2.0.0-rc3
2.0.0-rc4
3.*
3.0.0
3.0.0-beta1
3.0.0-beta2
3.0.0-beta3
3.0.0-beta4
3.0.0-rc0
3.1.0
3.2.0
3.3.0
3.4.0
3.5.0
3.5.1

Database specific

vanir_signatures_modified 
"2026-05-30T05:47:33Z"
vanir_signatures 
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            "function_hash": "238143633398654507201364296480508618014"
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        "deprecated": false,
        "id": "CVE-2026-33995-161a9362",
        "signature_version": "v1",
        "target": {
            "function": "kerberos_AcceptSecurityContext",
            "file": "winpr/libwinpr/sspi/Kerberos/kerberos.c"
        },
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        "deprecated": false,
        "id": "CVE-2026-33995-260f128b",
        "signature_version": "v1",
        "target": {
            "function": "negotiate_FreeCredentialsHandle",
            "file": "winpr/libwinpr/sspi/Negotiate/negotiate.c"
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        "deprecated": false,
        "id": "CVE-2026-33995-3c79d95f",
        "signature_version": "v1",
        "target": {
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            "file": "winpr/libwinpr/sspi/CredSSP/credssp.c"
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        "signature_type": "Function"
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        "deprecated": false,
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        "signature_version": "v1",
        "target": {
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        "deprecated": false,
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            "file": "winpr/libwinpr/sspi/Kerberos/kerberos.c"
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        "id": "CVE-2026-33995-50325d3b",
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        "digest": {
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        "digest": {
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        "id": "CVE-2026-33995-ae21c066",
        "signature_version": "v1",
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    },
    {
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        "digest": {
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        "deprecated": false,
        "id": "CVE-2026-33995-bb01c6a6",
        "signature_version": "v1",
        "target": {
            "function": "ntlm_DeleteSecurityContext",
            "file": "winpr/libwinpr/sspi/NTLM/ntlm.c"
        },
        "signature_type": "Function"
    },
    {
        "source": "https://github.com/freerdp/freerdp/commit/8078b8af1359055972e4fb2f509f543b69169391",
        "digest": {
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        "target": {
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        "target": {
            "function": "kerberos_FreeCredentialsHandle",
            "file": "winpr/libwinpr/sspi/Kerberos/kerberos.c"
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        "signature_version": "v1",
        "target": {
            "function": "kerberos_InitializeSecurityContextA",
            "file": "winpr/libwinpr/sspi/Kerberos/kerberos.c"
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    {
        "source": "https://github.com/freerdp/freerdp/commit/8078b8af1359055972e4fb2f509f543b69169391",
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        "target": {
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        "target": {
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        },
        "signature_type": "Line"
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]
source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-33995.json"