linux-cve-announce - CVE-2024-58078: misc: misc_minor_alloc to use ida for all dynamic/misc dynamic minors

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Message-ID: <2025030609-CVE-2024-58078-3d63@gregkh>
Date: Thu,  6 Mar 2025 17:14:11 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2024-58078: misc: misc_minor_alloc to use ida for all dynamic/misc dynamic minors

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

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

misc: misc_minor_alloc to use ida for all dynamic/misc dynamic minors

misc_minor_alloc was allocating id using ida for minor only in case of
MISC_DYNAMIC_MINOR but misc_minor_free was always freeing ids
using ida_free causing a mismatch and following warn:
> > WARNING: CPU: 0 PID: 159 at lib/idr.c:525 ida_free+0x3e0/0x41f
> > ida_free called for id=127 which is not allocated.
> > <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
...
> > [<60941eb4>] ida_free+0x3e0/0x41f
> > [<605ac993>] misc_minor_free+0x3e/0xbc
> > [<605acb82>] misc_deregister+0x171/0x1b3

misc_minor_alloc is changed to allocate id from ida for all minors
falling in the range of dynamic/ misc dynamic minors

The Linux kernel CVE team has assigned CVE-2024-58078 to this issue.


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

	Issue introduced in 6.2 with commit ab760791c0cfbb1d7a668f46a135264f56c8f018 and fixed in 6.6.78 with commit 3df72111c39f7e4c5029c9ff720b56ec2e05b764
	Issue introduced in 6.2 with commit ab760791c0cfbb1d7a668f46a135264f56c8f018 and fixed in 6.12.14 with commit 8b4120b3e060e137eaa8dc76a1c40401088336e5
	Issue introduced in 6.2 with commit ab760791c0cfbb1d7a668f46a135264f56c8f018 and fixed in 6.13.3 with commit 6635332d246d7db89b90e145f2bf937406cecaf0
	Issue introduced in 6.2 with commit ab760791c0cfbb1d7a668f46a135264f56c8f018 and fixed in 6.14-rc1 with commit 6d04d2b554b14ae6c428a9c60b6c85f1e5c89f68

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-2024-58078
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/char/misc.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/3df72111c39f7e4c5029c9ff720b56ec2e05b764
	https://git.kernel.org/stable/c/8b4120b3e060e137eaa8dc76a1c40401088336e5
	https://git.kernel.org/stable/c/6635332d246d7db89b90e145f2bf937406cecaf0
	https://git.kernel.org/stable/c/6d04d2b554b14ae6c428a9c60b6c85f1e5c89f68