Vulnerability-Lookup

CNVD-2021-19426

Vulnerability from cnvd - Published: 2021-03-19

Title

Linux kernel存在未明漏洞（CNVD-2021-19426）

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 4.18至5.10.16版本存在安全漏洞，该漏洞源于drm_xen_front驱动程序的后端分配模式并不意味着是一种受支持的配置，但在其支持状态条目中并未能相应地说明这一点。目前没有详细漏洞细节提供。

Severity

中

Patch Name

Linux kernel存在未明漏洞（CNVD-2021-19426）的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://xenbits.xen.org/xsa/advisory-363.html

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-26934

Impacted products

Name
Linux Linux kernel >=4.18，<=5.10.16

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-26934",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-26934"
    }
  },
  "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 4.18\u81f35.10.16\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8edrm_xen_front\u9a71\u52a8\u7a0b\u5e8f\u7684\u540e\u7aef\u5206\u914d\u6a21\u5f0f\u5e76\u4e0d\u610f\u5473\u7740\u662f\u4e00\u79cd\u53d7\u652f\u6301\u7684\u914d\u7f6e\uff0c\u4f46\u5728\u5176\u652f\u6301\u72b6\u6001\u6761\u76ee\u4e2d\u5e76\u672a\u80fd\u76f8\u5e94\u5730\u8bf4\u660e\u8fd9\u4e00\u70b9\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://xenbits.xen.org/xsa/advisory-363.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-19426",
  "openTime": "2021-03-19",
  "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 4.18\u81f35.10.16\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8edrm_xen_front\u9a71\u52a8\u7a0b\u5e8f\u7684\u540e\u7aef\u5206\u914d\u6a21\u5f0f\u5e76\u4e0d\u610f\u5473\u7740\u662f\u4e00\u79cd\u53d7\u652f\u6301\u7684\u914d\u7f6e\uff0c\u4f46\u5728\u5176\u652f\u6301\u72b6\u6001\u6761\u76ee\u4e2d\u5e76\u672a\u80fd\u76f8\u5e94\u5730\u8bf4\u660e\u8fd9\u4e00\u70b9\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-19426\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux  Linux kernel \u003e=4.18\uff0c\u003c=5.10.16"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-26934",
  "serverity": "\u4e2d",
  "submitTime": "2021-03-05",
  "title": "Linux kernel\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2021-19426\uff09"
}

CVE-2021-26934 (GCVE-0-2021-26934)

Vulnerability from cvelistv5 – Published: 2021-02-17 01:07 – Updated: 2024-08-03 20:33

Summary

An issue was discovered in the Linux kernel 4.18 through 5.10.16, as used by Xen. The backend allocation (aka be-alloc) mode of the drm_xen_front drivers was not meant to be a supported configuration, but this wasn't stated accordingly in its support status entry.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

4 references

URL	Tags
http://xenbits.xen.org/xsa/advisory-363.html	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.netapp.com/advisory/ntap-2021032…	x_refsource_CONFIRM

Show details on NVD website

JSON

To clipboard

{
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            "url": "http://xenbits.xen.org/xsa/advisory-363.html"
          },
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            "tags": [
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              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4GELN5E6MDR5KQBJF5M5COUUED3YFZTD/"
          },
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          },
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            ],
            "url": "https://security.netapp.com/advisory/ntap-20210326-0001/"
          }
        ],
        "title": "CVE Program Container"
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    "cna": {
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    "dateReserved": "2021-02-09T00:00:00.000Z",
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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.