# CVE-2022-42321: xen: Xenstore: Guests can crash xenstored via exhausting the stack Xenstored is using recursion for some Xenstore operatio...

CVE-2022-42321 is fixed in xen on 1 platform, first by DEBIAN-CVE-2022-42321, released November 1, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-42321
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 1, 2022

## Description

Xenstore: Guests can crash xenstored via exhausting the stack Xenstored is using recursion for some Xenstore operations (e.g. for deleting a sub-tree of Xenstore nodes). With sufficiently deep nesting levels this can result in stack exhaustion on xenstored, leading to a crash of xenstored.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xen Debian 12.15 (bookworm) | 4.16.2+90-g0d39a6d1ae-1 | [DEBIAN-CVE-2022-42321](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42321.md) | Nov 1, 2022 |
| Linux | xen Debian 13.5 (trixie) | 4.16.2+90-g0d39a6d1ae-1 | [DEBIAN-CVE-2022-42321](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42321.md) | Nov 1, 2022 |
| Linux | xen Debian 14 | 4.16.2+90-g0d39a6d1ae-1 | [DEBIAN-CVE-2022-42321](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42321.md) | Nov 1, 2022 |

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