CVE-2021-3493—Linux Kernel Privilege Escalation Vulnerability

PUBLISHEDvulnerability record
2022-10-20 · last modified June 21, 2025

Metadata

CVE ID：
CVE-2021-3493
项目：
Linux
产品：
Kernel
添加日期：
2022-10-20
到期日：
2022-11-10
最后更新：
June 21, 2025

漏洞名称

Linux Kernel Privilege Escalation Vulnerability

描述

The overlayfs stacking file system in Linux kernel does not properly validate the application of file capabilities against user namespaces, which could lead to privilege escalation.

已知用于勒索软件活动吗？

勒索软件状态：
Unknown

采集行动

Apply updates per vendor instructions.

其他说明

  • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7c03e2cda4a584cadc398e8f6641ca9988a39d52
  • https://nvd.nist.gov/vuln/detail/CVE-2021-3493

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