Vulnerability in Red Hat Enterprise Linux 10.0 Extended Update Support

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund8 Oct 2026WID-SEC-2026-3848

  Red Hat Enterprise Linux (sssd, tftp, ansible-collection-ansible-posix): Multiple vulnerabilities Translated from German

  CVE-2026-11837CVE-2026-85234CVE-2026-87853

[ References ]References

• access.redhat.com/errata/RHSA-2026:79112vendor-advisoryx_refsource_REDHAT
• access.redhat.com/errata/RHSA-2026:80508vendor-advisoryx_refsource_REDHAT
• access.redhat.com/errata/RHSA-2026:82339vendor-advisoryx_refsource_REDHAT
• access.redhat.com/security/cve/CVE-2026-11837vdb-entryx_refsource_REDHAT
• bugzilla.redhat.com/show_bug.cgiissue-trackingx_refsource_REDHAT