5.5

CVE-2023-34323: xenstored: A transaction conflict can crash C Xenstored

Modified
AliasesALPINE-CVE-2023-34323UBUNTU-CVE-2023-34323DEBIAN-CVE-2023-34323
Published 05-01-2024Last modified 04-11-2025

Vulnerability summary

CVE-2023-34323 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in xen. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 7
OPENSUSE-SU-2024:13442-1SUSE-SU-2023:4054-1SUSE-SU-2023:4055-1SUSE-SU-2023:4174-1SUSE-SU-2023:4183-1SUSE-SU-2023:4184-1

Timeline

  1. 05-01-2024
    PublishedVulnerability first disclosed.
  2. 04-11-2025
    Last modifiedVulnerability information updated.

Description

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction. Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

Decrease -0.01 pp

From 0.26% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Alpine1 product
  • xen< 4.15.5-r3 | < 4.16.5-r3 | < 4.17.2-r3
Debian1 product
  • xen< 4.17.2+76-ge1f9cb16e2-1~deb12u1 | < 4.17.2+55-g0b56bed864-1
Ubuntu1 product
  • xenAll versions (No fix recorded)
Xen1 product

4 vendors · 4 products

References

7 links