linux-cve-announce - CVE-2026-22984: libceph: prevent potential out-of-bounds reads in handle_auth

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <2026012349-CVE-2026-22984-001c@gregkh>
Date: Fri, 23 Jan 2026 16:24:55 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2026-22984: libceph: prevent potential out-of-bounds reads in handle_auth_done()

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

libceph: prevent potential out-of-bounds reads in handle_auth_done()

Perform an explicit bounds check on payload_len to avoid a possible
out-of-bounds access in the callout.

[ idryomov: changelog ]

The Linux kernel CVE team has assigned CVE-2026-22984 to this issue.


Affected and fixed versions
===========================

	Fixed in 5.15.198 with commit 194cfe2af4d2a1de599d39dad636b47c2f6c2c96
	Fixed in 6.1.161 with commit 79fe3511db416d2f2edcfd93569807cb02736e5e
	Fixed in 6.6.121 with commit ef208ea331ef688729f64089b895ed1b49e842e3
	Fixed in 6.12.66 with commit 2802ef3380fa8c4a08cda51ec1f085b1a712e9e2
	Fixed in 6.18.6 with commit 2d653bb63d598ae4b096dd678744bdcc34ee89e8
	Fixed in 6.19-rc5 with commit 818156caffbf55cb4d368f9c3cac64e458fb49c9

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2026-22984
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	net/ceph/messenger_v2.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/194cfe2af4d2a1de599d39dad636b47c2f6c2c96
	https://git.kernel.org/stable/c/79fe3511db416d2f2edcfd93569807cb02736e5e
	https://git.kernel.org/stable/c/ef208ea331ef688729f64089b895ed1b49e842e3
	https://git.kernel.org/stable/c/2802ef3380fa8c4a08cda51ec1f085b1a712e9e2
	https://git.kernel.org/stable/c/2d653bb63d598ae4b096dd678744bdcc34ee89e8
	https://git.kernel.org/stable/c/818156caffbf55cb4d368f9c3cac64e458fb49c9