Description
selinux_edit_copy_tfiles in sudoedit in Sudo before 1.9.5 allows a local unprivileged user to gain file ownership and escalate privileges by replacing a temporary file with a symlink to an arbitrary file target. This affects SELinux RBAC support in permissive mode. Machines without SELinux are not vulnerable.
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 | sudo | 1.9.5-1 | — |
| Debian 13 | sudo | 1.9.5-1 | — |
| Debian 12 | sudo | 1.9.5-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | sudo | No fix yet | — |
| Ubuntu Pro 18.04 LTS | sudo | No fix yet | — |
| Ubuntu Pro 16.04 LTS | sudo | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | sudo | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | sudo | 1.8.29-7.el8 | RHSA-2021:1723 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | sudo | 1.8.29-7.el8 | RLSA-2021:1723 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SLES 15 SP1 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SLES 15 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SLES 12 SP5 | sudo | 1.8.27-4.6.1 | SUSE-SU-2021:0225-1 |
| SLES 12 SP4 | sudo | 1.8.20p2-3.20.1 | SUSE-SU-2021:0226-1 |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | sudo | 1.8.20p2-3.20.1 | SUSE-SU-2021:0226-1 |
| SLES for SAP 15 SP1 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SLES for SAP 15 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SLES for SAP 12 SP5 | sudo | 1.8.27-4.6.1 | SUSE-SU-2021:0225-1 |
| SLES for SAP 12 SP4 | sudo | 1.8.20p2-3.20.1 | SUSE-SU-2021:0226-1 |
| SLES for SAP 12 SP3 | sudo | 1.8.20p2-3.20.1 | SUSE-SU-2021:0226-1 |
| SLE HPC 15 SP1 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SLE HPC 15 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SUSE OpenStack Cloud Crowbar 9 | sudo | 1.8.20p2-3.20.1 | SUSE-SU-2021:0226-1 |
| SUSE OpenStack Cloud Crowbar 8 | sudo | 1.8.20p2-3.20.1 | SUSE-SU-2021:0226-1 |
| SUSE OpenStack Cloud 9 | sudo | 1.8.20p2-3.20.1 | SUSE-SU-2021:0226-1 |
| SUSE OpenStack Cloud 8 | sudo | 1.8.20p2-3.20.1 | SUSE-SU-2021:0226-1 |
| SUSE Manager Server 4.0 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SUSE Manager Retail Branch Server 4.0 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SUSE Manager Proxy 4.0 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SUSE HPE Helion OpenStack 8 | sudo | 1.8.20p2-3.20.1 | SUSE-SU-2021:0226-1 |
| SUSE Enterprise Storage 6 | sudo | 1.8.22-4.15.1 | SUSE-SU-2021:0227-1 |
| SUSE Enterprise Storage 5 | sudo | 1.8.20p2-3.20.1 | SUSE-SU-2021:0226-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | sudo | 1.9.7p2-1.4 | openSUSE-SU-2024:11413-1 |
| openSUSE Leap 15.2 | sudo | 1.8.22-lp152.8.6.1 | openSUSE-SU-2021:0170-1 |
| openSUSE Leap 15.1 | sudo | 1.8.22-lp151.5.12.1 | openSUSE-SU-2021:0169-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | sudo | 1.9.5-r0 | — |
| Alpine v3.23 | sudo | 1.9.5-r0 | — |
| Alpine v3.22 | sudo | 1.9.5-r0 | — |
| Alpine v3.21 | sudo | 1.9.5-r0 | — |
| Alpine v3.20 | sudo | 1.9.5-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | sudo | 1.9.5-r0 | — |
| Alpine v3.18 | sudo | 1.9.5-r0 | — |
| Alpine v3.17 | sudo | 1.9.5-r0 | — |
| Alpine v3.16 | sudo | 1.9.5-r0 | — |
| Alpine v3.15 | sudo | 1.9.5-r0 | — |
| Alpine v3.14 | sudo | 1.9.5-r0 | — |
| Alpine v3.13 | sudo | 1.9.5-r0 | — |
| Alpine v3.12 | sudo | 1.9.5-r0 | — |
| Alpine v3.11 | sudo | 1.9.5p2-r0 | — |
| Alpine v3.10 | sudo | 1.9.5p2-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | sudo | 1.8.29-7.el8 | ELSA-2021-1723 |
Advisories 10
- WID-SEC-2025-0227 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- RHSA-2021:1723 Red Hat Security Advisory: sudo security and bug fix update Red Hat Security Advisories (RHSA) · Apr 30, 2026
- RLSA-2021:1723 Low: sudo security and bug fix update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2021:0169-1 Security update for sudo SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0226-1 Security update for sudo SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0225-1 Security update for sudo SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0170-1 Security update for sudo SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11413-1 sudo-1.9.7p2-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0227-1 Security update for sudo SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2021-1723 Low: sudo security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021
References
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23240
- https://www.sudo.ws/stable.html#1.9.5
- FEDORA-2021-324479472c vendor-advisory
- FEDORA-2021-234d14bfcc vendor-advisory
- GLSA-202101-33 vendor-advisory
- https://security.netapp.com/advisory/ntap-20210129-0010/
- [bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list
- [bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list