# CVE-2022-42331: xen: x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original Spectre/Meltdown securi...

CVE-2022-42331 is fixed in xen on 1 platform, first by DEBIAN-CVE-2022-42331, released March 21, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-42331
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 21, 2023

## Description

x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original Spectre/Meltdown security work (XSA-254), one entrypath performs its speculation-safety actions too late. In some configurations, there is an unprotected RET instruction which can be attacked with a variety of speculative attacks.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xen Debian 12.15 (bookworm) | 4.17.0+74-g3eac216e6e-1 | [DEBIAN-CVE-2022-42331](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42331.md) | Mar 21, 2023 |
| Linux | xen Debian 13.5 (trixie) | 4.17.0+74-g3eac216e6e-1 | [DEBIAN-CVE-2022-42331](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42331.md) | Mar 21, 2023 |
| Linux | xen Debian 14 | 4.17.0+74-g3eac216e6e-1 | [DEBIAN-CVE-2022-42331](https://patchblox.com/security/data/fix/linux/debian-cve-2022-42331.md) | Mar 21, 2023 |

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