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Ubuntu Security NoticesUSN-8705-2

USN-8705-2: OpenZFS vulnerability

Severity not listed 0 CVEs Published Aug 31, 2026 at 9:36 PM UTC

Summary

USN-8705-1 fixed vulnerabilities in OpenZFS. This update provides the corresponding fix for OpenZFS on Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. Original advisory details: It was discovered that OpenZFS incorrectly handled authorization checks for certain ioctl operations on Linux. A local attacker could possibly use this issue to perform pool-administrative operations or access privileged information, resulting in an authorization bypass.

Products covered

A separate affected-products list was not included in the collected bulletin.

Remediation

USN-8705-1 fixed vulnerabilities in OpenZFS.

CVEs in this advisory 0

No CVE identifiers were listed in the collected bulletin.

Updates

  1. Published by Ubuntu

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.