CVE-2026-40226

EUVD-2026-21400
In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.4 MEDIUM
LOCAL
HIGH
HIGH
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 1%
Affected Products (NVD)
VendorProductVersion
systemd_projectsystemd
233 ≤
𝑥
< 257.12
systemd_projectsystemd
258 ≤
𝑥
< 258.6
systemd_projectsystemd
259 ≤
𝑥
< 259.4
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
systemd
bookworm
252.39-1~deb12u2
fixed
bookworm (security)
vulnerable
bullseye
vulnerable
bullseye (security)
247.3-7+deb11u8
fixed
forky
260.1-1
fixed
sid
261~rc1-1
fixed
trixie
257.13-1~deb13u1
fixed