THREAT OPS › Threat News › [NVD] CVE-2026-78408 (HIGH 7.9) — The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve(). Because the kernel checks later cgroup migrations using the credentials from the original open, a pr
[NVD] CVE-2026-78408 (HIGH 7.9) — The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve(). Because the kernel checks later cgroup migrations using the credentials from the original open, a pr
CVE-2026-78408 CVSS: 7.9 HIGH Published: 2026-09-02T16:17:23.687
The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve(). Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an attacker-controlled target can inherit
MITRE ATT&CK techniques
- CredentialsT1589.001
Indicators of compromise
- CVE-2026-78408cve
Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-78408