PT-2026-44242 · Linux · Linux

Published

2026-05-28

·

Updated

2026-06-01

·

CVE-2026-46119

CVSS v3.1

9.1

Critical

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
In the Linux kernel, the following vulnerability has been resolved:
libceph: Fix slab-out-of-bounds access in auth message processing
If a (potentially corrupted) message of type CEPH MSG AUTH REPLY contains a positive value in its result field, it is treated as an error code by ceph handle auth reply() and returned to handle auth reply(). Thereafter, an attempt is made to send the preallocated message of type CEPH MSG AUTH, where the returned value is interpreted as the size of the front segment to send. If the result value in the message is greater than the size of the memory buffer allocated for the front segment, an out-of-bounds access occurs, and the content of the memory region beyond this buffer is sent out.
This patch fixes the issue by treating only negative values in the result field as errors. Positive values are therefore treated as success in the same way as a zero value. Additionally, a BUG ON is added to send prepared auth request() comparing the len parameter to front alloc len to prevent sending the message if it exceeds the bounds of the allocation and to make it easier to catch any logic flaws leading to this.

Fix

Related Identifiers

CVE-2026-46119

Affected Products

Linux