How severe is CVE-2023-34323?

CVE-2023-34323 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-34323 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34323?

CVE-2023-34323 affects Xen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-34323?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-34323 have an EU (EUVD) identifier?

Yes. CVE-2023-34323 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-38404.

When was CVE-2023-34323 published?

CVE-2023-34323 was published on 2024-01-05 and last updated on 2026-06-17.

CVE-2023-34323

CVE-2023-34323 is a medium-severity vulnerability in Xen with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-38404
Weakness: CWE-476
Affected product: Xen
Published: 2024-01-05
Last modified: 2026-06-17

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).

Frequently asked questions

What is CVE-2023-34323?: 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).
How severe is CVE-2023-34323?: CVE-2023-34323 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-34323 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34323?: CVE-2023-34323 affects Xen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-34323?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-34323 have an EU (EUVD) identifier?: Yes. CVE-2023-34323 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-38404.
When was CVE-2023-34323 published?: CVE-2023-34323 was published on 2024-01-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

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