What’s Vulnerable › Vulnerabilities

CVE-2026-35368: uutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service Switch (NSS) Injection

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-22 · updated 2026-10-26
• Weakness: CWE-426

Description

A vulnerability exists in the chroot utility of uutils coreutils when using the --userspec option. The utility resolves the user specification via getpwnam() after entering the chroot but before dropping root privileges. On glibc-based systems, this can trigger the Name Service Switch (NSS) to load shared libraries (e.g., libnss_*.so.2) from the new root directory. If the NEWROOT is writable by an attacker, they can inject a malicious NSS module to execute arbitrary code as root, facilitating a full container escape or privilege escalation.

Affected products

• Uutils coreutils: all versions

References

• https://github.com/uutils/coreutils/issues/10327
• https://github.com/uutils/coreutils/issues/10327

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