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Race Condition Affecting xen package, versions <4.16.1-r2

Severity

 Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment

    Threat Intelligence

    EPSS
    0.05% (16th percentile)

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  • Snyk ID SNYK-ALPINE320-XEN-7012606
  • published 23 May 2024
  • disclosed 9 Jun 2022
Report a new vulnerability Found a mistake?

Introduced: 9 Jun 2022

CVE-2022-26362 Open this link in a new tab
CWE-362 Open this link in a new tab

How to fix?

Upgrade Alpine:3.20 xen to version 4.16.1-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Alpine. See How to fix? for Alpine:3.20 relevant fixed versions and status.

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.

References

CVSS Scores

version 3.1
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NVD

Recommended
6.4 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    High
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
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SUSE

7.4 high