PT-2026-31935 · Systemd+2 · Systemd-Nspawn+2

CVE-2026-40226 · Published 2026-04-10 · Updated 2026-07-16

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions systemd versions 233 through 259

Description A flaw in nspawn allows an escape-to-host action to occur through the use of a crafted optional configuration file.

Recommendations Update to version 260.

Exploit

Fix

Weakness Enumeration

CWE-348

Related Identifiers

CVE-2026-40226

ECHO-918A-FD9A-B2CD

GHSA-9MJ4-RRC3-GJCX

OESA-2026-2277

OESA-2026-2278

OESA-2026-2279

OESA-2026-2280

OESA-2026-2358

RHSA-2026:7299

SUSE-SU-2026:22736-1

SUSE-SU-2026:2785-1

SUSE-SU-2026:2809-1

USN-8402-1

Affected Products

Linuxmint

Ubuntu

Systemd-Nspawn

References · 37

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40226.json · Exploit
• https://github.com/systemd/systemd/security/advisories/GHSA-9mj4-rrc3-gjcx · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:2785-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-40226 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:2809-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-40226 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2358 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-40226 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22736-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2280 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-40226 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8402-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-40226 · Security Note
• https://ubuntu.com/security/notices/USN-8402-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2277 · Vendor Advisory