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TI-2026-29031 Aliases CVE-2026-40226GHSA-hc7r-6254-88w5

In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.

Priority MEDIUM 64CWE-348Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00075 0th percentileScored 2026-11-07
Fix Fixed systemd (systemd): 260Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
systemdsystemd233 to before 260260Patch availableCNA
  • systemd Vendorsystemd Affected 233 to before 260 Fixed in 260 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*233 to before 257.12; 258 to before 258.6; 259 to before 259.4Vulnerablesystemd
  • cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:* Versions 233 to before 257.12; 258 to before 258.6; 259 to before 259.4 Vulnerable ·systemd

Remediation

  • Fix · CNA systemd (systemd) Fixed in 260

Red Hat 1 advisory

  • RHSA-2026:7299 Released 2026-04-09 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images systemd-260.1-2.1.hum1@aarch64, systemd-260.1-2.1.hum1@src, systemd-260.1-2.1.hum1@x86_64 +40

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    systemd 260

    4 records Highest priority Priority MEDIUM 1 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-29029 Incorrect authorization in systemdPriority LOW 33
    • TI-2026-29030 In udev in systemd before 260, local root execution can occur via malicious hardware…Priority LOW 29
    • TI-2026-29028 In systemd 258 before 260, a local unprivileged user can trigger an assert when a…Priority LOW 23
    Show all 4 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:7299
Not affected: 5 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40226
  2. 2026-10-03 Alias added: GHSA-hc7r-6254-88w5

References

Advisory 1

  • TI-2023-11736 systemd before 247 does not adequately block local privilege escalation for some Sudo… CVSS 3.1HIGH 7.8
  • TI-2017-06857 In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can… CVSS 3.1HIGH 7.5
  • TI-2022-04038 Information disclosure in systemd CVSS 3.1MEDIUM 5.5
  • TI-2025-04111 Systemd-coredump: race condition that allows a local attacker to crash a suid program and… CVSS 3.1MEDIUM 4.7
  • TI-2017-11647 In systemd 223 through 235, a remote DNS server can respond with a custom crafted DNS… CVSS 3.1HIGH 7.5
  • TI-2026-29033 In systemd 259, systemd-journald can send ANSI escape sequences to the terminals of… CVSS 3.1LOW 3.3
See all 54 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences