# CVE-2022-42309: xen: Xenstore: Guests can crash xenstored Due to a bug in the fix of XSA-115 a malicious guest can cause xenstored to use...

CVE-2022-42309 is fixed in xen on 1 platform, first by DEBIAN-CVE-2022-42309, released November 1, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-42309
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 1, 2022

## Description

Xenstore: Guests can crash xenstored Due to a bug in the fix of XSA-115 a malicious guest can cause xenstored to use a wrong pointer during node creation in an error path, resulting in a crash of xenstored or a memory corruption in xenstored causing further damage. Entering the error path can be controlled by the guest e.g. by exceeding the quota value of maximum nodes per domain.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xen Debian 12.15 (bookworm) | 4.16.2+90-g0d39a6d1ae-1 | [DEBIAN-CVE-2022-42309](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42309.md) | Nov 1, 2022 |
| Linux | xen Debian 13.5 (trixie) | 4.16.2+90-g0d39a6d1ae-1 | [DEBIAN-CVE-2022-42309](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42309.md) | Nov 1, 2022 |
| Linux | xen Debian 14 | 4.16.2+90-g0d39a6d1ae-1 | [DEBIAN-CVE-2022-42309](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42309.md) | Nov 1, 2022 |

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