CVE-2026-12391 Affecting ubuntu-advantage-tools package, versions <37.2ubuntu0.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2604-UBUNTUADVANTAGETOOLS-17995432
- published16 Jul 2026
- disclosed16 Jul 2026
Introduced: 16 Jul 2026
CVE-2026-12391 (opens in a new tab)How to fix?
Upgrade Ubuntu:26.04 ubuntu-advantage-tools to version 37.2ubuntu0.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ubuntu-advantage-tools package and not the ubuntu-advantage-tools package as distributed by Ubuntu.
See How to fix? for Ubuntu:26.04 relevant fixed versions and status.
An insecure symlink following vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools) within the pro collect-logs command framework. The utility creates or utilizes predictable temporary file paths or user-accessible log directories when gathering diagnostic information without verifying the file type or ownership. An unprivileged local attacker can exploit this behavior by creating a symbolic link (symlink) at a predictable destination path pointing to an arbitrary, root-readable file (such as /etc/shadow or private files within /root). When a root administrator or operator subsequently executes the pro collect-logs command, the tool follows the user-controlled symlink, reads the target file, and compresses its contents into the resulting diagnostic support archive. Because the output archive remains readable by the unprivileged user, the attacker can extract and read the sensitive root-owned files, leading to a complete information disclosure of system secrets.