# CVE-2023-34323: xen: When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes

CVE-2023-34323 is fixed in xen on 1 platform, first by DEBIAN-CVE-2023-34323, released January 5, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-34323
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 5, 2024

## 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).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xen Debian 12.15 (bookworm) | 4.17.2+76-ge1f9cb16e2-1~deb12u1 | [DEBIAN-CVE-2023-34323](https://patchblox.com/security/data/fix/linux/debian-cve-2023-34323.md) | Jan 5, 2024 |
| Linux | xen Debian 13.5 (trixie) | 4.17.2+55-g0b56bed864-1 | [DEBIAN-CVE-2023-34323](https://patchblox.com/security/data/fix/linux/debian-cve-2023-34323.md) | Jan 5, 2024 |
| Linux | xen Debian 14 | 4.17.2+55-g0b56bed864-1 | [DEBIAN-CVE-2023-34323](https://patchblox.com/security/data/fix/linux/debian-cve-2023-34323.md) | Jan 5, 2024 |

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