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🛡️ CVE-2023-34322 on Alpine — xen

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

For migration as well as to work around kernels unaware of L1TF (see

XSA-273), PV guests may be run in shadow paging mode. Since Xen itself

needs to be mapped when PV guests run, Xen and shadowed PV guests run

directly the respective shadow page tables. For 64-bit PV guests this

means running on the shadow of the guest root page table.

In the course of dealing with shortage of memory in the shadow pool

associated with a domain, shadows of page tables may be torn down. This

tearing down may include the shadow root page table that the CPU in

question is presently running on. While a precaution exists to

supposedly prevent the tearing down of the underlying live page table,

the time window covered by that precaution isn't large enough.

Distribution advisory

This page covers CVE-2023-34322 as tracked by Alpine, for the package xen. The fix is available in version 4.17.2-r1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

ALPINE-CVE-2023-34322 is classified as CWE-273: Improper Check for Dropped Privileges. The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.

Affected software

ALPINE-CVE-2023-34322 is recorded against 1 package.

  • xen (from 3.2.0 up to 4.17.2-r1)

Timeline and source

Published on 5 January 2024 and last revised on 7 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

security.alpinelinux.org (Advisory)

Other advisories for this package

xen has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-273: Improper Check for Dropped Privileges) in other software:

CVE-2023-34322 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2024-01-05
Updated 2026-08-20
Modified 2026-08-07
Fix URL N/A

Affected Packages

Software From version Fixed in
xen 3.2.0 4.17.2-r1

Site Security Check

Is xen part of your stack?

ALPINE-CVE-2023-34322 is rated CVSS 7.8 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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