linux-cve-announce - CVE-2023-53568: s390/zcrypt: don't leak memory if dev_set

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Message-ID: <2025100452-CVE-2023-53568-0020@gregkh>
Date: Sat,  4 Oct 2025 17:17:22 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2023-53568: s390/zcrypt: don't leak memory if dev_set_name() fails

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

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

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

s390/zcrypt: don't leak memory if dev_set_name() fails

When dev_set_name() fails, zcdn_create() doesn't free the newly
allocated resources. Do it.

The Linux kernel CVE team has assigned CVE-2023-53568 to this issue.


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

	Issue introduced in 4.20 with commit 00fab2350e6b91e57b3cdcd5d9f01056775a921d and fixed in 5.4.257 with commit 6b0cb9c055843777b374309503d89eabeb769355
	Issue introduced in 4.20 with commit 00fab2350e6b91e57b3cdcd5d9f01056775a921d and fixed in 5.10.195 with commit 0878052579cb2773caee64812a811edcab6b5a55
	Issue introduced in 4.20 with commit 00fab2350e6b91e57b3cdcd5d9f01056775a921d and fixed in 5.15.132 with commit 131cd74a8e38d75239f2c81dfee53d6554eb8bf8
	Issue introduced in 4.20 with commit 00fab2350e6b91e57b3cdcd5d9f01056775a921d and fixed in 6.1.54 with commit 147d8da33a2c2195ec63acd56cd7d80a3458c253
	Issue introduced in 4.20 with commit 00fab2350e6b91e57b3cdcd5d9f01056775a921d and fixed in 6.5.4 with commit 174f11ef1615ec3ab1e2189685864433c0d855a2
	Issue introduced in 4.20 with commit 00fab2350e6b91e57b3cdcd5d9f01056775a921d and fixed in 6.6 with commit 6252f47b78031979ad919f971dc8468b893488bd

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-2023-53568
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/s390/crypto/zcrypt_api.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/6b0cb9c055843777b374309503d89eabeb769355
	https://git.kernel.org/stable/c/0878052579cb2773caee64812a811edcab6b5a55
	https://git.kernel.org/stable/c/131cd74a8e38d75239f2c81dfee53d6554eb8bf8
	https://git.kernel.org/stable/c/147d8da33a2c2195ec63acd56cd7d80a3458c253
	https://git.kernel.org/stable/c/174f11ef1615ec3ab1e2189685864433c0d855a2
	https://git.kernel.org/stable/c/6252f47b78031979ad919f971dc8468b893488bd