linux-cve-announce - CVE-2024-50238: phy: qcom: qmp-usbc: fix NULL-deref on runtime suspend

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: <2024110932-CVE-2024-50238-5489@gregkh>
Date: Sat,  9 Nov 2024 11:15:46 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-50238: phy: qcom: qmp-usbc: fix NULL-deref on runtime suspend

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

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

phy: qcom: qmp-usbc: fix NULL-deref on runtime suspend

Commit 413db06c05e7 ("phy: qcom-qmp-usb: clean up probe initialisation")
removed most users of the platform device driver data from the
qcom-qmp-usb driver, but mistakenly also removed the initialisation
despite the data still being used in the runtime PM callbacks. This bug
was later reproduced when the driver was copied to create the qmp-usbc
driver.

Restore the driver data initialisation at probe to avoid a NULL-pointer
dereference on runtime suspend.

Apparently no one uses runtime PM, which currently needs to be enabled
manually through sysfs, with these drivers.

The Linux kernel CVE team has assigned CVE-2024-50238 to this issue.

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

	Issue introduced in 6.9 with commit 19281571a4d5 and fixed in 6.11.7 with commit c7086dc0539b
	Issue introduced in 6.9 with commit 19281571a4d5 and fixed in 6.12-rc6 with commit 34c21f94fa1e
	Issue introduced in 6.8.2 with commit bdb35fcff34a

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-2024-50238
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/phy/qualcomm/phy-qcom-qmp-usbc.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/c7086dc0539b1b2b61c8c735186698bca4858246
	https://git.kernel.org/stable/c/34c21f94fa1e147a19b54b6adf0c93a623b70dd8