CVE-2021-3493
Linux Kernel Privilege Escalation Vulnerability
7.8
HIGH
CVSS 3.1
⚠ KEVEPSS 44.0%
描述
The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on files in an underlying file system. Due to the combination of unprivileged user namespaces along with a patch carried in the Ubuntu kernel to allow unprivileged overlay mounts, an attacker could use this to gain elevated privileges.
如何修補 CVE-2021-3493
要修補 CVE-2021-3493,請將受影響套件升級到下列已修補版本。
- —升級至 5.10.38-1 或更新版本
CVE-2021-3493 正在被利用嗎?
是 — CVE-2021-3493 已列入 CISA Known Exploited Vulnerabilities (KEV) 清單,代表正在被實際利用,請立即修補。
受影響套件(1)
- from 0, < 5.10.38-1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |