linux-cve-announce - CVE-2025-37883: s390/sclp: Add check for get_zeroed

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Message-ID: <2025050944-CVE-2025-37883-d5d2@gregkh>
Date: Fri,  9 May 2025 08:45:50 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-37883: s390/sclp: Add check for get_zeroed_page()

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

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

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

s390/sclp: Add check for get_zeroed_page()

Add check for the return value of get_zeroed_page() in
sclp_console_init() to prevent null pointer dereference.
Furthermore, to solve the memory leak caused by the loop
allocation, add a free helper to do the free job.

The Linux kernel CVE team has assigned CVE-2025-37883 to this issue.


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

	Fixed in 5.15.181 with commit e1e00dc45648125ef7cb87ebc3b581ac224e7b39
	Fixed in 6.1.136 with commit 397254706eba9d8f99fd237feede7ab3169a7f9a
	Fixed in 6.6.89 with commit 28e5a867aa542e369e211c2baba7044228809a99
	Fixed in 6.12.26 with commit 3b3aa72636a6205933609ec274a8747720c1ee3f
	Fixed in 6.14.5 with commit f69f8a93aacf6e99af7b1cc992d8ca2cc07b96fb
	Fixed in 6.15-rc1 with commit 3db42c75a921854a99db0a2775814fef97415bac

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-2025-37883
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/char/sclp_con.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/e1e00dc45648125ef7cb87ebc3b581ac224e7b39
	https://git.kernel.org/stable/c/397254706eba9d8f99fd237feede7ab3169a7f9a
	https://git.kernel.org/stable/c/28e5a867aa542e369e211c2baba7044228809a99
	https://git.kernel.org/stable/c/3b3aa72636a6205933609ec274a8747720c1ee3f
	https://git.kernel.org/stable/c/f69f8a93aacf6e99af7b1cc992d8ca2cc07b96fb
	https://git.kernel.org/stable/c/3db42c75a921854a99db0a2775814fef97415bac