USN-8895-1: Sudo vulnerability — USN-8895-1

Summary

It was discovered that Sudo did not properly handle time-based access restrictions when sudoers rules used NOTBEFORE or NOTAFTER with timestamps omitting the trailing timezone indicator. A local attacker could possibly use this issue to execute commands outside the intended time window by manipulating the TZ environment variable.

Timeline

Published by source

2026-10-07

Risk context

• Reported severity or threat level: medium.
• Review exposure for the affected product or family: Ubuntu.

Product

Ubuntu

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source

Evidence and provenance

Canonical advisory ID

USN-8895-1

Source

Ubuntu

Vendor

Ubuntu

Published by source

2026-10-07

Last source activity

2026-10-07

Curated by

hlukh.ch

Related advisories and connections

These advisories are connected by shared CVE, product, vendor, source, or time signals.