linux-cve-announce - CVE-2024-53137: ARM: fix cacheflush with PAN

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Message-ID: <2024120452-CVE-2024-53137-b908@gregkh>
Date: Wed,  4 Dec 2024 15:21:00 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-53137: ARM: fix cacheflush with PAN

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

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

ARM: fix cacheflush with PAN

It seems that the cacheflush syscall got broken when PAN for LPAE was
implemented. User access was not enabled around the cache maintenance
instructions, causing them to fault.

The Linux kernel CVE team has assigned CVE-2024-53137 to this issue.


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

	Issue introduced in 6.10 with commit 7af5b901e847 and fixed in 6.11.10 with commit e6960a2ed49c
	Issue introduced in 6.10 with commit 7af5b901e847 and fixed in 6.12 with commit ca29cfcc4a21

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-2024-53137
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:
	arch/arm/kernel/traps.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/e6960a2ed49c9a25357817535f7cc50594a58604
	https://git.kernel.org/stable/c/ca29cfcc4a21083d671522ad384532e28a43f033