Vulnerability-Lookup

CNVD-2021-34719

Vulnerability from cnvd - Published: 2021-05-15

Title

Linux kernel缓冲区溢出漏洞（CNVD-2021-34719）

Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。KVM是其中的一个基于内核的虚拟机。 Linux内核5.12之前版本存在缓冲区错误漏洞。该漏洞这可能导致越界写入。目前没有详细的漏洞细节提供。

Severity

低

Patch Name

Linux kernel缓冲区溢出漏洞（CNVD-2021-34719）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。KVM是其中的一个基于内核的虚拟机。 Linux内核5.12之前版本存在缓冲区错误漏洞。该漏洞这可能导致越界写入。目前没有详细的漏洞细节提供。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

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04c4f2ee3f68c9a4bf1653d15f1a9a435ae33f7a

Reference

https://vigilance.fr/vulnerability/Linux-kernel-memory-corruption-via-KVM-35276

Impacted products

Name
Linux Linux kernel <5.12

Show details on source website

JSON

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    "cve": {
      "cveNumber": "CVE-2021-3501"
    }
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  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002KVM\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u57fa\u4e8e\u5185\u6838\u7684\u865a\u62df\u673a\u3002\n\nLinux\u5185\u68385.12\u4e4b\u524d\u7248\u672c\u5b58\u5728\u7f13\u51b2\u533a\u9519\u8bef\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u8fd9\u53ef\u80fd\u5bfc\u81f4\u8d8a\u754c\u5199\u5165\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-34719",
  "openTime": "2021-05-15",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002KVM\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u57fa\u4e8e\u5185\u6838\u7684\u865a\u62df\u673a\u3002\r\n\r\nLinux\u5185\u68385.12\u4e4b\u524d\u7248\u672c\u5b58\u5728\u7f13\u51b2\u533a\u9519\u8bef\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u8fd9\u53ef\u80fd\u5bfc\u81f4\u8d8a\u754c\u5199\u5165\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\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\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-34719\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003c5.12"
  },
  "referenceLink": "https://vigilance.fr/vulnerability/Linux-kernel-memory-corruption-via-KVM-35276",
  "serverity": "\u4f4e",
  "submitTime": "2021-05-10",
  "title": "Linux kernel\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-34719\uff09"
}

CVE-2021-3501 (GCVE-0-2021-3501)

Vulnerability from cvelistv5 – Published: 2021-05-05 22:31 – Updated: 2026-08-05 21:23

Summary

A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.

Severity

No CVSS data available.

CWE

CWE-787

Assigner

redhat redhat root

References

3 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1950136	x_refsource_MISC
https://git.kernel.org/pub/scm/linux/kernel/git/t…	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021061…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
Linux	kernel	Affected: 5.9 , < 5.10.32 (semver) Affected: 5.11 , < 5.11.16 (semver)

Show details on NVD website

JSON

To clipboard

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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.

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.
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CNVD-2021-34719

CVE-2021-3501 (GCVE-0-2021-3501)

Tags

Sightings

Nomenclature

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