NULL pointer dereference in Xen
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).
EPSS: 0.003 (17.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Xen — versions consult Xen advisory XSA-440
Weakness classification (CWE)
References
- security@xen.org (Patch, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-34323?
- CVE-2023-34323 is a medium-severity vulnerability in Xen, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2024-01-05.
- How severe is CVE-2023-34323?
- Medium severity. CVSS v3 base score is 5.5 out of 10.