Skip to main content
CVE-2026-40226VulnerabilityPublished Updated

systemd · In Nspawn

Affects MicrosoftSource GCVE Database

0
Compare

Not known to be exploited.

Data as of 30 Oct 2026, 11:52 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
0.07% chance of exploitation in 30 days – higher than 0% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Microsoft Security Response Center MicrosoftAffected
  • =3.0
  • =2.0
  • Microsoft
  • Azure Linux
  • 3.0
  • Azure Linux 3.0
  • 2.0
Fixed in–

AI-suggested

Users should monitor official vendor advisories for updates or fixes addressing this vulnerability. Until a fix is available, avoid using untrusted optional configuration files with nspawn.

Description

A vulnerability exists in systemd's nspawn component versions 2.0 and 3.0, where an escape-to-host action can be triggered via a crafted optional configuration file. This issue affects versions 2.0 and 3.0 specifically. No CVSS score is provided, and no public exploit or known exploitation in the wild has been reported. No patch or remediation information is available from the provided data.

References

Community reviews

Loading reviews…