Description
The MOTD update script in the base-files package in Ubuntu 18.04 LTS before 10.1ubuntu2.2, and Ubuntu 18.10 before 10.1ubuntu6 incorrectly handled temporary files. A local attacker could use this issue to cause a denial of service, or possibly escalate privileges if kernel symlink restrictions were disabled.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Ubuntu | base-files | unspecified – < 10.1ubuntu2.2 | 10.1ubuntu2.2 |
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | base-files | 10.1ubuntu2.2 | USN-3748-1 |
Advisories 1
- USN-3748-1 base-files vulnerability Ubuntu Security Notices (USN) · Feb 10, 2026
References
- USN-3748-1 vendor-advisory
- 1041530 vdb-entry
- 105148 vdb-entry