linux-cve-announce - CVE-2025-22016: dpll: fix xa_alloc

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: <2025040844-CVE-2025-22016-ac9d@gregkh>
Date: Tue,  8 Apr 2025 10:16:50 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-22016: dpll: fix xa_alloc_cyclic() error handling

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

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

dpll: fix xa_alloc_cyclic() error handling

In case of returning 1 from xa_alloc_cyclic() (wrapping) ERR_PTR(1) will
be returned, which will cause IS_ERR() to be false. Which can lead to
dereference not allocated pointer (pin).

Fix it by checking if err is lower than zero.

This wasn't found in real usecase, only noticed. Credit to Pierre.

The Linux kernel CVE team has assigned CVE-2025-22016 to this issue.


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

	Issue introduced in 6.8 with commit 97f265ef7f5b526b33d6030b2a1fc69a2259bf4a and fixed in 6.12.21 with commit cb2f8a5c1fd9e7a1fefa23afe20570e16da1ada4
	Issue introduced in 6.8 with commit 97f265ef7f5b526b33d6030b2a1fc69a2259bf4a and fixed in 6.13.9 with commit 4d350043be684762e581d9bdd32d543621d01a9c
	Issue introduced in 6.8 with commit 97f265ef7f5b526b33d6030b2a1fc69a2259bf4a and fixed in 6.14 with commit 3614bf90130d60f191a5fe218d04f6251c678e13

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-2025-22016
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:
	drivers/dpll/dpll_core.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/cb2f8a5c1fd9e7a1fefa23afe20570e16da1ada4
	https://git.kernel.org/stable/c/4d350043be684762e581d9bdd32d543621d01a9c
	https://git.kernel.org/stable/c/3614bf90130d60f191a5fe218d04f6251c678e13