CVE-2022-33745
xen - security update
8.8
HIGH
CVSS 3.1
EPSS 0.29%
描述
insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.
如何修補 CVE-2022-33745
要修補 CVE-2022-33745,請將受影響套件升級到下列已修補版本。
- —升級至 4.14.5-r5 或更新版本
- —升級至 4.14.5+86-g1c354767d5-1 或更新版本
- —升級至 4.14.5+86-g1c354767d5-1 或更新版本
CVE-2022-33745 正在被利用嗎?
低 — EPSS 為 0.3%,目前沒有觀察到大規模利用活動。
受影響套件(3)
- from 0, < 4.14.5-r5
- from 0, < 4.14.5+86-g1c354767d5-1
- from 0, < 4.14.5+86-g1c354767d5-1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |