CVE-2026-68433

A flaw was found in the libceph component of the Linux kernel. This vulnerability occurs because the system incorrectly processes replies, using an allocated buffer size rather than the actual received data length. A specially crafted, truncated reply can lead to the system reading uninitialized memory. This could result in the disclosure of sensitive information or cause system instability.

This issue affects systems using the in-kernel Ceph client (libceph). MON_GET_VERSION_REPLY decoding used the allocated buffer size instead of received length, allowing stale tail bytes to be read on truncated replies from the monitor. Systems without Ceph are not affected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.