# CVE-2025-58150: xen: Shadow mode tracing code uses a set of per-CPU variables to avoid cumbersome parameter passing

CVE-2025-58150 is fixed in xen on 1 platform, first by SUSE-SU-2026:0306-1, released January 27, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-58150
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 27, 2026

## Description

Shadow mode tracing code uses a set of per-CPU variables to avoid cumbersome parameter passing.  Some of these variables are written to with guest controlled data, of guest controllable size.  That size can be larger than the variable, and bounding of the writes was missing.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | xen Debian 12.15 (bookworm) | 4.17.7-0+deb12u1 | [DEBIAN-CVE-2025-58150](https://patchblox.com/security/data/fix/linux/debian-cve-2025-58150.md) | Jan 28, 2026 |
| Linux | xen Debian 13.5 (trixie) | 4.20.2+37-g61ff35323e-0+deb13u1 | [DEBIAN-CVE-2025-58150](https://patchblox.com/security/data/fix/linux/debian-cve-2025-58150.md) | Jan 28, 2026 |
| Linux | xen Debian 14 | 4.20.2+37-g61ff35323e-1 | [DEBIAN-CVE-2025-58150](https://patchblox.com/security/data/fix/linux/debian-cve-2025-58150.md) | Jan 28, 2026 |
| Linux | xen opensuse-leap 15.6 | 4.18.5_10-150600.3.37.1 | [SUSE-SU-2026:0306-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0306-1.md) | Jan 27, 2026 |
| Linux | xen sles 15.7 | 4.20.2_06-150700.3.25.1 | [SUSE-SU-2026:0589-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0589-1.md) | Feb 20, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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