CVE-2026-35368
uutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service Switch (NSS) Injection
- State
- Published
- Severity
- 7.2 High
- Published
- Apr 22, 2026
- Updated
- Apr 25, 2026
- Reserved
- Apr 2, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.2 High | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H | canonical |
Weaknesses
- CWE-426 Untrusted Search Path
Affected Products
| Product | Versions |
|---|---|
coreutilsUutils |
References
- https://github.com/uutils/coreutils/issues/10327issue-tracking
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