CVE-2026-35368
Publication date 22 April 2026
Last updated 11 November 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| rust-coreutils | 26.10 stonking |
Fixed in 0.9.0-2ubuntu1
|
| 26.04 LTS resolute |
Fixed in 0.10.0-1ubuntu2~26.04.1
|
|
| 24.04 LTS noble |
Vulnerable
|
|
| 22.04 LTS jammy | Not in release |
Notes
john-breton
Fixed in 0.10.0-1ubuntu2~26.04.1 in resolute-updates (LP: #2166202), but not yet in the -security pocket.
Severity score breakdown
CVSS version: CVSS v3.0
Base score
7.8 · High
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-9041-1
- uutils coreutils vulnerabilities
- 11 November 2026