Description
In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | bash-completion | No fix yet | — |
| Debian 14 | util-linux | 2.31.1-0.5 | — |
| Debian 13 | bash-completion | No fix yet | — |
| Debian 13 | util-linux | 2.31.1-0.5 | — |
| Debian 12 | bash-completion | No fix yet | — |
| Debian 12 | util-linux | 2.31.1-0.5 | — |
| Debian 9 | util-linux | 2.29.2-1+deb9u1 | DSA-4134-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | util-linux | 2.31.1-0.4ubuntu3.7 | USN-4512-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | util-linux +1 | 2.33.2-150100.4.40.1 | SUSE-SU-2023:4512-1 |
| SLES 15 SP1 | util-linux +1 | 2.33.2-150100.4.40.1 | SUSE-SU-2023:4512-1 |
| SLES 15 | util-linux +1 | 2.31.1-9.3.1 | SUSE-SU-2018:2066-1 |
| SLES 12 SP5 | util-linux +2 | 2.33.2-4.33.1 | SUSE-SU-2023:3268-1 |
| SLES 12 SP3 | util-linux +2 | 2.29.2-3.8.1 | SUSE-SU-2018:3926-1, SUSE-SU-2018:2071-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | python-libmount | 2.28-44.18.38 | SUSE-SU-2019:0390-1 |
| SLES 12 SP2 | util-linux | 2.28-44.18.18 | SUSE-SU-2019:0390-1 |
| SLES 12 SP2 | util-linux-systemd | 2.28-44.18.25 | SUSE-SU-2019:0390-1 |
| SLES for SAP 15 SP2 | util-linux +1 | 2.33.2-150100.4.40.1 | SUSE-SU-2023:4512-1 |
| SLES for SAP 15 SP1 | util-linux +1 | 2.33.2-150100.4.40.1 | SUSE-SU-2023:4512-1 |
| SLES for SAP 12 SP5 | util-linux +2 | 2.33.2-4.33.1 | SUSE-SU-2023:3268-1 |
| SLES for SAP 12 SP3 | util-linux +2 | 2.29.2-3.8.1 | SUSE-SU-2018:3926-1, SUSE-SU-2018:2071-1 |
| SLES for SAP 12 SP2 | python-libmount | 2.28-44.18.38 | SUSE-SU-2019:0390-1 |
| SLES for SAP 12 SP2 | util-linux | 2.28-44.18.18 | SUSE-SU-2019:0390-1 |
| SLES for SAP 12 SP2 | util-linux-systemd | 2.28-44.18.25 | SUSE-SU-2019:0390-1 |
| SLE HPC 15 SP2 | util-linux +1 | 2.33.2-150100.4.40.1 | SUSE-SU-2023:4512-1 |
| SLE HPC 15 SP1 | util-linux +1 | 2.33.2-150100.4.40.1 | SUSE-SU-2023:4512-1 |
| SUSE OpenStack Cloud 7 | python-libmount | 2.28-44.18.38 | SUSE-SU-2019:0390-1 |
| SUSE OpenStack Cloud 7 | util-linux | 2.28-44.18.18 | SUSE-SU-2019:0390-1 |
| SUSE OpenStack Cloud 7 | util-linux-systemd | 2.28-44.18.25 | SUSE-SU-2019:0390-1 |
| SUSE Enterprise Storage 4 | python-libmount | 2.28-44.18.38 | SUSE-SU-2019:0390-1 |
| SUSE Enterprise Storage 4 | util-linux | 2.28-44.18.18 | SUSE-SU-2019:0390-1 |
| SUSE Enterprise Storage 4 | util-linux-systemd | 2.28-44.18.25 | SUSE-SU-2019:0390-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | python-libmount | 2.31.1-150000.9.24.1 | SUSE-SU-2023:4372-1 |
| openSUSE Leap 15.4 | python-libmount | 2.31.1-150000.9.24.1 | SUSE-SU-2023:4372-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | uuidd +13 | 2.30.2-2.amzn2.0.9 | ALAS2-2022-1878 |
Advisories 12
- USN-4512-1 util-linux vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4134-1 util-linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:2066-1 Security update for util-linux SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3926-1 Security update for util-linux SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2071-1 Security update for util-linux SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4372-1 Security update for util-linux SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4512-1 Security update for util-linux SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0390-1 Security update for util-linux SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3268-1 Security update for util-linux SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-2246 util-linux: Schwachstelle ermöglicht Privilegieneskalation BSI CERT-Bund (WID) · Nov 21, 2023
- WID-SEC-2023-1969 HPE Fabric OS: Mehrere Schwachstellen ermöglichen Privilegieneskalation BSI CERT-Bund (WID) · Aug 6, 2023
- ALAS2-2022-1878 Moderate: util-linux security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Dec 6, 2022