Disclosure summary
In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.
Source-reported weakness categories
CWE-348
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Apr
Open original source · Updated Sep 24, 2026
In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 6.4
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | azl3 systemd 255-26 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 systemd 250.3-24 on CBL Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | azl3 systemd 255-27 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | azl3 systemd 255-30 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 systemd 250.3-24 on CBL-Mariner 2.0 | (MSRC status code 3) |
Vendor remediation references
- CBL-Mariner Releases · build 255-28 · product IDs 21282-17084
- Vendor guidance · product IDs 21282-17084
- CBL-Mariner Releases · build 255-30 · product IDs 21393-17084
- Vendor guidance · product IDs 21393-17084
- Release Notes · product IDs 21125-21692
- Vendor guidance · product IDs 21125-21692
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-04-11T21:01:57-04:00
MODIFIED 2026-09-24T22:45:51-04:00
INGESTED 2026-10-08T12:45:03-04:00