Vulnerability-Lookup

CNVD-2026-16032

Vulnerability from cnvd - Published: 2026-04-03

Title

FreeRDP双重释放漏洞（CNVD-2026-16032）

Description

FreeRDP是一款开源的远程桌面协议（RDP）实现库与客户端。 FreeRDP存在双重释放漏洞。该漏洞产生的原因是kerberos_AcceptSecurityContext与kerberos_InitializeSecurityContextA函数在内存释放过程中存在重复释放问题。攻击者可利用该漏洞通过构造恶意RDP服务器响应触发客户端内存错误导致程序崩溃。

Severity

中

Patch Name

FreeRDP双重释放漏洞（CNVD-2026-16032）的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mv25-f4p2-5mxx

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-33995

Impacted products

Name
FreeRDP FreeRDP <3.24.2

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-33995",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-33995"
    }
  },
  "description": "FreeRDP\u662f\u4e00\u6b3e\u5f00\u6e90\u7684\u8fdc\u7a0b\u684c\u9762\u534f\u8bae\uff08RDP\uff09\u5b9e\u73b0\u5e93\u4e0e\u5ba2\u6237\u7aef\u3002\n\nFreeRDP\u5b58\u5728\u53cc\u91cd\u91ca\u653e\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662fkerberos_AcceptSecurityContext\u4e0ekerberos_InitializeSecurityContextA\u51fd\u6570\u5728\u5185\u5b58\u91ca\u653e\u8fc7\u7a0b\u4e2d\u5b58\u5728\u91cd\u590d\u91ca\u653e\u95ee\u9898\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u6784\u9020\u6076\u610fRDP\u670d\u52a1\u5668\u54cd\u5e94\u89e6\u53d1\u5ba2\u6237\u7aef\u5185\u5b58\u9519\u8bef\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mv25-f4p2-5mxx",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-16032",
  "openTime": "2026-04-03",
  "patchDescription": "FreeRDP\u662f\u4e00\u6b3e\u5f00\u6e90\u7684\u8fdc\u7a0b\u684c\u9762\u534f\u8bae\uff08RDP\uff09\u5b9e\u73b0\u5e93\u4e0e\u5ba2\u6237\u7aef\u3002\r\n\r\nFreeRDP\u5b58\u5728\u53cc\u91cd\u91ca\u653e\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662fkerberos_AcceptSecurityContext\u4e0ekerberos_InitializeSecurityContextA\u51fd\u6570\u5728\u5185\u5b58\u91ca\u653e\u8fc7\u7a0b\u4e2d\u5b58\u5728\u91cd\u590d\u91ca\u653e\u95ee\u9898\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u6784\u9020\u6076\u610fRDP\u670d\u52a1\u5668\u54cd\u5e94\u89e6\u53d1\u5ba2\u6237\u7aef\u5185\u5b58\u9519\u8bef\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "FreeRDP\u53cc\u91cd\u91ca\u653e\u6f0f\u6d1e\uff08CNVD-2026-16032\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "FreeRDP FreeRDP \u003c3.24.2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-33995",
  "serverity": "\u4e2d",
  "submitTime": "2026-04-02",
  "title": "FreeRDP\u53cc\u91cd\u91ca\u653e\u6f0f\u6d1e\uff08CNVD-2026-16032\uff09"
}

CVE-2026-33995 (GCVE-0-2026-33995)

Vulnerability from cvelistv5 – Published: 2026-03-30 21:43 – Updated: 2026-04-02 14:13

Title

FreeRDP: Possible double free in kerberos_AcceptSecurityContext

Summary

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.

Severity ?

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CWE

CWE-415 - Double Free

Assigner

GitHub_M

References

URL

Tags

	https://github.com/FreeRDP/FreeRDP/security/advis…	x_refsource_CONFIRM
	https://github.com/FreeRDP/FreeRDP/commit/8078b8a…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	FreeRDP	FreeRDP	Affected: < 3.24.2

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33995",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-02T14:12:44.001128Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-02T14:13:21.632Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "FreeRDP",
          "vendor": "FreeRDP",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.24.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-415",
              "description": "CWE-415: Double Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-30T21:43:49.873Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mv25-f4p2-5mxx",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mv25-f4p2-5mxx"
        },
        {
          "name": "https://github.com/FreeRDP/FreeRDP/commit/8078b8af1359055972e4fb2f509f543b69169391",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/FreeRDP/FreeRDP/commit/8078b8af1359055972e4fb2f509f543b69169391"
        }
      ],
      "source": {
        "advisory": "GHSA-mv25-f4p2-5mxx",
        "discovery": "UNKNOWN"
      },
      "title": "FreeRDP: Possible double free in kerberos_AcceptSecurityContext"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-33995",
    "datePublished": "2026-03-30T21:43:49.873Z",
    "dateReserved": "2026-03-24T22:20:06.212Z",
    "dateUpdated": "2026-04-02T14:13:21.632Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CNVD-2026-16032

CVE-2026-33995 (GCVE-0-2026-33995)

Tags

Sightings

Nomenclature