CVE-2026-22992: libceph: return the handler error from mon_handle_auth_done()
In the Linux kernel, the following vulnerability has been resolved:
libceph: return the handler error from monhandleauthdone()
Currently any error from cephauthhandlereplydone() is propagated via finishauth() but isn't returned from monhandleauthdone(). This results in higher layers learning that (despite the monitor considering us to be successfully authenticated) something went wrong in the authentication phase and reacting accordingly, but msgr2 still trying to proceed with establishing the session in the background. In the case of secure mode this can trigger a WARN in setupcrypto() and later lead to a NULL pointer dereference inside of prepareauthsignature().
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-22992?
CVE-2026-22992 has a moderate severity rating due to its impact on authentication handling in the Linux kernel.
How do I fix CVE-2026-22992?
To fix CVE-2026-22992, update the Linux kernel to the latest version where the vulnerability has been addressed.
What impact does CVE-2026-22992 have on system security?
CVE-2026-22992 can lead to improper handling of authentication errors, potentially allowing unauthorized access in a ceph environment.
Which Linux versions are affected by CVE-2026-22992?
CVE-2026-22992 affects multiple versions of the Linux kernel that utilize libceph for Ceph's authentication mechanisms.
Is CVE-2026-22992 remote exploit capable?
CVE-2026-22992 is not classified as a remote code execution vulnerability, but it may aid in local privilege escalation under certain conditions.