Sudo Inclusion of Functionality from Untrusted Control Sphere Vulnerability
Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf from a user-controlled directory is used with the --chroot option.
What happened
Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf from a user-controlled directory is used with the --chroot option.
CISA lists it as exploited, added 29 Sep 2025.
Does it affect you
Names Canonical Ubuntu, Red Hat Enterprise Linux. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Follow the vendor advisory for the fixed release and any interim mitigation.
sudo.ws - Follow the vendor advisory for the fixed release and any interim mitigation.
sudo.ws - Follow the vendor advisory for the fixed release and any interim mitigation.
sudo.ws - Follow the vendor advisory for the fixed release and any interim mitigation.
vicarius.io - Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
cisa.gov
CISA’s notes for this entry:
- This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: sudo.ws/security/advisories/chroot_bug/
- nvd.nist.gov/vuln/detail/CVE-2025-32463
Affected, as published to NVD
- ubuntu
- Canonical Ubuntu: exactly 22.04
- rhel
- Red Hat Enterprise Linux: exactly 10.0
The record
- NVD status
- Analyzed
- Published
- 30 Jun 2025, last modified 17 Jun 2026 (NVD)
- Severity
- CVSS 3.1 base score 7.8, High — computed here from the vector; NVD states 7.8.
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-829 Inclusion of Functionality from Untrusted Control Sphere (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 29 Sep 2025; federal remediation due 20 Oct 2025. CISA entry
- Exploit probability
- EPSS 55.5%, 99th percentile — FIRST, scored 23 Oct 2026. FIRST EPSS
- Vendor
- Sudo · Sudo (CISA)
References on the NVD record
- sudo.ws/security/advisories/Vendor Advisory
- sudo.ws/security/advisories/chroot_bug/Vendor Advisory
- vicarius.io/vsociety/posts/cve-2025-32463-mitigate-sudo-vulnerabilityMitigationThird Party Advisory
- sudo.ws/releases/changelog/Release Notes
- access.redhat.com/security/cve/cve-2025-32463Third Party Advisory
- bugs.gentoo.org/show_bug.cgi?id=CVE-2025-32463Issue TrackingThird Party Advisory
- explore.alas.aws.amazon.com/CVE-2025-32463.htmlThird Party Advisory
- security-tracker.debian.org/tracker/CVE-2025-32463Third Party Advisory
- ubuntu.com/security/notices/USN-7604-1Third Party Advisory
- openwall.com/lists/oss-security/2025/06/30/3Third Party Advisory
- secpod.com/blog/sudo-lpe-vulnerabilities-resolved-what-you-need-to-know-about-cve-2025-32462-and-cve-2025-32463/ExploitThird Party Advisory
- stratascale.com/vulnerability-alert-CVE-2025-32463-sudo-chrootExploitThird Party Advisory
- suse.com/security/cve/CVE-2025-32463.htmlThird Party Advisory
- suse.com/support/update/announcement/2025/suse-su-202502177-1/Third Party Advisory
- vicarius.io/vsociety/posts/cve-2025-32463-detect-sudo-vulnerabilityThird Party Advisory
- iototsecnews.jp/2025/07/01/linux-sudo-chroot-vulnerability-enables-hackers-to-elevate-privileges-to-root/Third Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32463US Government Resource
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.