CVE-2022-26362
MEDIUM6.4EPSS 0.05%Published: 6/9/2022Modified: 12/3/2025
Also known as:ALPINE-CVE-2022-26362
Description
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.
Affected packages (2)
- Alpine/xenfrom 0, < 4.14.5-r1
- Debian/xenfrom 0, < 4.14.5+24-g87d90d511c-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| 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 |