CVE-2022-26362
6.4
MEDIUM
CVSS 3.1
EPSS 0.38%
描述
x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
如何修補 CVE-2022-26362
要修補 CVE-2022-26362,請將受影響套件升級到下列已修補版本。
- —升級至 4.14.5-r1 或更新版本
- —升級至 4.14.5+24-g87d90d511c-1 或更新版本
CVE-2022-26362 正在被利用嗎?
低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 4.14.5-r1
- from 0, < 4.14.5+24-g87d90d511c-1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.4 | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H |