Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-11837: A local privilege escalation vulnerability was found in the ansible.posix authorized_key module. The module's keyfile() function uses os.chown() instead of os.lchown() and opens files without O_NOFOLLOW when managing SSH authorized keys. An unprivileged local user can pre-stage symbolic links in their ~/.ssh directory to redirect file ownership changes to arbitrary system paths when an operator runs the authorized_key task as root, leading to local privilege escalation.
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | ansible | 0:8.3.0-1.amzn2023.0.3 |
Vulnerabilities 1
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High 7.3CVE-2026-11837 Public exploit
Ansible-collection-ansible-posix: ansible.posix authorized_key: local privilege escalation via symlink-following chown
A local privilege escalation vulnerability was found in the ansible.posix authorized_key module. The module's keyfile() function uses os.chown() instead of os.lchown() and opens files without O_NOFOLLOW when managing SSH authorized keys. An unprivileged local…
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2026-11837.html