cnvd - cnvd-2022-21490

cnvd-2022-21490

Vulnerability from cnvd

Title: Linux kernel竞争条件问题漏洞（CNVD-2022-21490）

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。overlayfs是其中的一套文件系统。

Linux kernel 存在安全漏洞，该漏洞源于overlayfs文件系统中的竞争条件问题。目前没有详细的漏洞细节提供。

Severity: 中

Patch Name: Linux kernel竞争条件问题漏洞（CNVD-2022-21490）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。overlayfs是其中的一套文件系统。

Linux kernel 存在安全漏洞，该漏洞源于overlayfs文件系统中的竞争条件问题。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://lists.debian.org/debian-lts-announce/2021/12/msg00012.html

Reference: https://vigilance.fr/vulnerability/Linux-kernel-file-read-write-via-OverlayFS-Rename-37096

Impacted products

Name
Linux kernel <5.15

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-20321"
    }
  },
  "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\u3002overlayfs\u662f\u5176\u4e2d\u7684\u4e00\u5957\u6587\u4ef6\u7cfb\u7edf\u3002\n\nLinux kernel \u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eoverlayfs\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u7ade\u4e89\u6761\u4ef6\u95ee\u9898\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\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://lists.debian.org/debian-lts-announce/2021/12/msg00012.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2022-21490",
  "openTime": "2022-03-22",
  "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\u3002overlayfs\u662f\u5176\u4e2d\u7684\u4e00\u5957\u6587\u4ef6\u7cfb\u7edf\u3002\r\n\r\nLinux kernel \u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eoverlayfs\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u7ade\u4e89\u6761\u4ef6\u95ee\u9898\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\u7ade\u4e89\u6761\u4ef6\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2022-21490\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux kernel \u003c5.15"
  },
  "referenceLink": "https://vigilance.fr/vulnerability/Linux-kernel-file-read-write-via-OverlayFS-Rename-37096",
  "serverity": "\u4e2d",
  "submitTime": "2021-12-21",
  "title": "Linux kernel\u7ade\u4e89\u6761\u4ef6\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2022-21490\uff09"
}

CVE-2021-20321 (GCVE-0-2021-20321)

Vulnerability from cvelistv5

Published

2022-02-18 17:50

Modified

2024-08-03 17:37

Severity ?

CWE

CWE-362

Summary

A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.

References

▼	URL	Tags
	https://bugzilla.redhat.com/show_bug.cgi?id=2013242	x_refsource_MISC
	https://lore.kernel.org/all/20211011134508.748956131%40linuxfoundation.org/	x_refsource_MISC
	https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html	mailing-list, x_refsource_MLIST
	https://www.debian.org/security/2022/dsa-5096	vendor-advisory, x_refsource_DEBIAN

Impacted products

	Vendor	Product	Version
	n/a	kernel	Version: kernel 5.15-rc5

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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