linux-cve-announce - CVE-2022-50835: jbd2: add miss release buffer head in fc_do_one

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Message-ID: <2025123017-CVE-2022-50835-a5ba@gregkh>
Date: Tue, 30 Dec 2025 13:13:21 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50835: jbd2: add miss release buffer head in fc_do_one_pass()

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

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

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

jbd2: add miss release buffer head in fc_do_one_pass()

In fc_do_one_pass() miss release buffer head after use which will lead
to reference count leak.

The Linux kernel CVE team has assigned CVE-2022-50835 to this issue.


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

	Fixed in 5.10.150 with commit e65506ff181fc176088f32117d69b9cb1ddda777
	Fixed in 5.15.75 with commit 56fcd0788f0d9243c1754bd6f80b8b327c4afeee
	Fixed in 5.19.17 with commit 27c7bd35135d5ab38b9138ecf186ce54a96c98d9
	Fixed in 6.0.3 with commit 1f48116cbd3404898c9022892e114dd7cc3063c1
	Fixed in 6.1 with commit dfff66f30f66b9524b661f311bbed8ff3d2ca49f

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-2022-50835
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:
	fs/jbd2/recovery.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/e65506ff181fc176088f32117d69b9cb1ddda777
	https://git.kernel.org/stable/c/56fcd0788f0d9243c1754bd6f80b8b327c4afeee
	https://git.kernel.org/stable/c/27c7bd35135d5ab38b9138ecf186ce54a96c98d9
	https://git.kernel.org/stable/c/1f48116cbd3404898c9022892e114dd7cc3063c1
	https://git.kernel.org/stable/c/dfff66f30f66b9524b661f311bbed8ff3d2ca49f