PT-2026-34504 · Unknown · Uutils Coreutils

Zellic · Published 2026-04-22 · Updated 2026-05-01 · CVE-2026-35368

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions uutils coreutils (affected versions not specified)

Description A flaw in the chroot utility occurs when the --userspec option is used. The utility calls the getPwnam() function to resolve user specifications after entering the chroot environment but before relinquishing root privileges. On glibc-based systems, this process triggers the Name Service Switch (NSS), which may load shared libraries such as 'libnss *.so.2' from the new root directory. If an attacker has write access to the new root directory, they can inject a malicious NSS module to execute arbitrary code with root privileges, potentially leading to privilege escalation or a full container escape.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Untrusted Search Path

Weakness Enumeration

CWE-426

Related Identifiers

CVE-2026-35368

GHSA-MH5C-XRMH-M794

Affected Products

Uutils Coreutils

References · 11

• 🔥 https://github.com/uutils/coreutils/issues/10327 · Exploit
• https://osv.dev/vulnerability/GHSA-mh5c-xrmh-m794 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-35368 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-35368 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-35368 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-35368 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-35368 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-35368 · Vendor Advisory
• https://github.com/uutils/coreutils · Note
• https://twitter.com/CVEnew/status/2047012085813727719 · Twitter Post
• https://reddit.com/r/rust/comments/1t0ua9g/ubuntus_rust_coreutils_audit_found_44_cves_zero · Reddit Post