CVE-2025-32463: Sudo Inclusion of Functionality from Untrusted Control Sphere Vulnerability

Q: How do I fix CVE-2025-32463?

sudo: upgrade to 1.9.17; ubuntu linux: mitigate or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2025-32463 being exploited?

Yes. CVE-2025-32463 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

Q: What does CVE-2025-32463 affect?

CVE-2025-32463 affects sudo, ubuntu linux, debian linux. Severity is critical (CVSS 9.3). 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.

Q: How urgent is CVE-2025-32463?

Priority 92/100. Critical severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference; On your watchlist

Patch now

CRITICAL 9.3EXPLOITEDWATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2025-32463 is a critical-severity flaw (CVSS 9.3) affecting sudo, ubuntu linux, debian linux, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Exploited in the wild (CISA KEV)
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	55.5% (top 1%)
CISA exploited list	Yes, fix due 2025-10-20
Weakness	CWE-829
Published	2025-06-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: canonical · debian · opensuse · redhat · sudo project · suse

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-30 21:15 UTCPublished CVE record published
2025-09-29Exploited Added to the CISA Known Exploited Vulnerabilities list
2025-10-20Deadline CISA due date for US federal agencies to patch
2026-06-17 09:12 UTCUpdated Record last modified

sudo project sudo UPGRADE

Affected: >= 1.9.14 and < 1.9.17 · 1.9.17

Fixed in: 1.9.17

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sudo || rpm -q sudo || sudo --version

2. UPGRADE to 1.9.17 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sudo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sudo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

canonical ubuntu linux MITIGATE

Affected: 22.04 · 24.04 · 24.10 · 25.04

Fixed in: no fixed release known

Safe to downgrade to: a release before 22.04

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

debian debian linux MITIGATE

Affected: 11.0 · 12.0 · 13.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

opensuse leap MITIGATE

Affected: 15.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.6

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

suse linux enterprise desktop MITIGATE

Affected: 15 sp6 · 15 sp7

Fixed in: no fixed release known

Safe to downgrade to: a release before 15

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora ELN · fips-provider-next · FIXED · 1.5.3-3.eln159 · FEDORA-2026-3ce99ec7df · source

sudo dnf upgrade --advisory=FEDORA-2026-3ce99ec7df

Fedora 46 · rubygem-webmock · FIXED · 3.26.1-3.fc46 · FEDORA-2026-bb57b4d095 · source

sudo dnf upgrade --advisory=FEDORA-2026-bb57b4d095

Ubuntu 20.04 · sudo · NOT AFFECTED

Ubuntu 22.04 · sudo · NOT AFFECTED

Ubuntu 24.04 · sudo · FIXED · 1.9.15p5-3ubuntu5.24.04.1

sudo apt update && sudo apt install --only-upgrade sudo dpkg --compare-versions "$(dpkg-query -W -f='${Version}' sudo)" ge "1.9.15p5-3ubuntu5.24.04.1" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 24.10 · sudo · FIXED · 1.9.15p5-3ubuntu5.24.10.1

sudo apt update && sudo apt install --only-upgrade sudo dpkg --compare-versions "$(dpkg-query -W -f='${Version}' sudo)" ge "1.9.15p5-3ubuntu5.24.10.1" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 25.04 · sudo · FIXED · 1.9.16p2-1ubuntu1.1

sudo apt update && sudo apt install --only-upgrade sudo dpkg --compare-versions "$(dpkg-query -W -f='${Version}' sudo)" ge "1.9.16p2-1ubuntu1.1" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · sudo · NOT AFFECTED

Debian 13 · sudo · FIXED · 1.9.16p2-3

sudo apt update && sudo apt install --only-upgrade sudo dpkg --compare-versions "$(dpkg-query -W -f='${Version}' sudo)" ge "1.9.16p2-3" && echo PATCHED || echo STILL-VULNERABLE

RHEL 10 · sudo · FIXED · sudo-1.9.15-8.p5.el10_0.2

sudo dnf upgrade --advisory=RHSA-2025:11537 rpm -q sudo

RHEL 6 · sudo · NOT AFFECTED

RHEL 7 · sudo · NOT AFFECTED

RHEL 8 · sudo · NOT AFFECTED

RHEL 9 · sudo · NOT AFFECTED

Alpine 3.21 · sudo · FIXED · sudo-1.9.17_p1-r0

apk add --upgrade sudo apk info -v sudo

Alpine 3.22 · sudo · FIXED · sudo-1.9.17_p1-r0

apk add --upgrade sudo apk info -v sudo

Alpine 3.23 · sudo · FIXED · sudo-1.9.17_p1-r0

apk add --upgrade sudo apk info -v sudo

Alpine 3.24 · sudo · FIXED · sudo-1.9.17_p1-r0

apk add --upgrade sudo apk info -v sudo

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2025-1070 · source

sudo dnf update --advisory=ALAS2023-2025-1070

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: pr0v3rbs/CVE-2025-32463_chwoot (532 stars)
GitHub PoC: kh4sh3i/CVE-2025-32463 (475 stars)
GitHub PoC: MohamedKarrab/CVE-2025-32463 (51 stars)
Write-up: iototsecnews.jp/2025/07/01/linux-sudo-chroot-vulnerability-enables-hackers-to-elevate-priv
Write-up: www.stratascale.com/vulnerability-alert-CVE-2025-32463-sudo-chroot
Write-up: www.vicarius.io/vsociety/posts/cve-2025-32463-detect-sudo-vulnerability
Exploit-DB: Sudo chroot 1.9.17 - Local Privilege Escalation
Metasploit: Sudo Chroot 1.9.17 Privilege Escalation

Advisories and coverage

Official advisories

sudo Releases: Sudo 1.9.17p1 2025-07-22

Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-32463?

sudo: upgrade to 1.9.17; ubuntu linux: mitigate or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-32463 being exploited?

Yes. CVE-2025-32463 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2025-32463 affect?

CVE-2025-32463 affects sudo, ubuntu linux, debian linux. Severity is critical (CVSS 9.3). 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.

How urgent is CVE-2025-32463?

Priority 92/100. Critical severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference; On your watchlist

Software pages

Ubuntu vulnerabilities · Debian vulnerabilities · Sudo vulnerabilities

Related CVEs

CVE-2026-35535 HIGH 7.4 UPGRADE UPGRADE In Sudo through 1.9.17p2 before 3e474c2, a failure of a setuid, setgid, or setgroups call, during a privilege
CVE-2025-32462 LOW 2.8 UPGRADE Sudo before 1.9.17p1, when used with a sudoers file that specifies a host that is neither the current host nor
CVE-2025-46718 LOW 3.3 UPGRADE sudo-rs is a memory safe implementation of sudo and su written in Rust
CVE-2025-46717 LOW 3.3 UPGRADE sudo-rs is a memory safe implementation of sudo and su written in Rust

References

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