Vulnerability-Lookup

CNVD-2025-03431

Vulnerability from cnvd - Published: 2025-02-21

Title

Linux kernel代码问题漏洞（CNVD-2025-03431）

Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在代码问题漏洞，该漏洞源于vsock_*[has_data|has_space]函数在套接字未分配传输层时被调用，攻击者可利用该漏洞导致空指针引用。

Severity

中

Patch Name

Linux kernel代码问题漏洞（CNVD-2025-03431）的补丁

Patch Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在代码问题漏洞，该漏洞源于vsock_*[has_data|has_space]函数在套接字未分配传输层时被调用，攻击者可利用该漏洞导致空指针引用。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://git.kernel.org/stable/c/91751e248256efc111e52e15115840c35d85abaf

Reference

https://nvd.nist.gov/vuln/detail/CVE-2025-21666

Impacted products

Name
Linux Kernel

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2025-21666",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2025-21666"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel\u5b58\u5728\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8evsock_*[has_data|has_space]\u51fd\u6570\u5728\u5957\u63a5\u5b57\u672a\u5206\u914d\u4f20\u8f93\u5c42\u65f6\u88ab\u8c03\u7528\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7a7a\u6307\u9488\u5f15\u7528\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://git.kernel.org/stable/c/91751e248256efc111e52e15115840c35d85abaf",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2025-03431",
  "openTime": "2025-02-21",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u5b58\u5728\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8evsock_*[has_data|has_space]\u51fd\u6570\u5728\u5957\u63a5\u5b57\u672a\u5206\u914d\u4f20\u8f93\u5c42\u65f6\u88ab\u8c03\u7528\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7a7a\u6307\u9488\u5f15\u7528\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": "Linux kernel\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2025-03431\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Kernel"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2025-21666",
  "serverity": "\u4e2d",
  "submitTime": "2025-02-17",
  "title": "Linux kernel\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2025-03431\uff09"
}

CVE-2025-21666 (GCVE-0-2025-21666)

Vulnerability from cvelistv5 – Published: 2025-01-31 11:25 – Updated: 2026-05-12 12:03

Title

vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]

Summary

In the Linux kernel, the following vulnerability has been resolved: vsock: prevent null-ptr-deref in vsock_*[has_data|has_space] Recent reports have shown how we sometimes call vsock_*_has_data() when a vsock socket has been de-assigned from a transport (see attached links), but we shouldn't. Previous commits should have solved the real problems, but we may have more in the future, so to avoid null-ptr-deref, we can return 0 (no space, no data available) but with a warning. This way the code should continue to run in a nearly consistent state and have a warning that allows us to debug future problems.

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 19:52 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Linux mitre root

References

9 references

URL	Tags
https://git.kernel.org/stable/c/daeac89cdb03d3002…
https://git.kernel.org/stable/c/9e5fed46ccd2c34c5…
https://git.kernel.org/stable/c/b52e50dd4fabd1294…
https://git.kernel.org/stable/c/bc9c49341f9728c31…
https://git.kernel.org/stable/c/c23d1d4f8efefb722…
https://git.kernel.org/stable/c/91751e248256efc11…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

3 products

Vendor	Product	Version
Linux	Linux	Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < daeac89cdb03d30028186f5ff7dc26ec8fa843e7 (git) Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853e (git) Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < b52e50dd4fabd12944172bd486a4f4853b7f74dd (git) Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < bc9c49341f9728c31fe248c5fbba32d2e81a092b (git) Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < c23d1d4f8efefb72258e9cedce29de10d057f8ca (git) Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 91751e248256efc111e52e15115840c35d85abaf (git)
Linux	Linux	Affected: 5.5 Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.234 , ≤ 5.10.* (semver) Unaffected: 5.15.177 , ≤ 5.15.* (semver) Unaffected: 6.1.127 , ≤ 6.1.* (semver) Unaffected: 6.6.74 , ≤ 6.6.* (semver) Unaffected: 6.12.11 , ≤ 6.12.* (semver) Unaffected: 6.13 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	Affected: 0 , < * (custom)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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            }
          },
          {
            "other": {
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                "options": [
                  {
                    "Exploitation": "none"
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                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:52:24.276957Z",
                "version": "2.0.3"
              },
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            }
          }
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.234",
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            },
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              "version": "5.15.177",
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            },
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              "status": "unaffected",
              "version": "6.1.127",
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.74",
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            }
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}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.