linux-cve-announce - CVE-2022-49643: ima: Fix a potential integer overflow in ima_appraise

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Message-ID: <2025022619-CVE-2022-49643-ae05@gregkh>
Date: Wed, 26 Feb 2025 03:23:26 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49643: ima: Fix a potential integer overflow in ima_appraise_measurement

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

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

ima: Fix a potential integer overflow in ima_appraise_measurement

When the ima-modsig is enabled, the rc passed to evm_verifyxattr() may be
negative, which may cause the integer overflow problem.

The Linux kernel CVE team has assigned CVE-2022-49643 to this issue.


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

	Issue introduced in 5.4 with commit 39b07096364a42c516415d5f841069e885234e61 and fixed in 5.4.207 with commit 388f3df7c3c8b7f2a32b9ae0a9b2f9f6ad3b1b77
	Issue introduced in 5.4 with commit 39b07096364a42c516415d5f841069e885234e61 and fixed in 5.10.132 with commit 831e190175f10652be93b08436cc7bf2e62e4bb6
	Issue introduced in 5.4 with commit 39b07096364a42c516415d5f841069e885234e61 and fixed in 5.15.56 with commit c8d5d81940938b5f6c0f495ca9538e7740416f30
	Issue introduced in 5.4 with commit 39b07096364a42c516415d5f841069e885234e61 and fixed in 5.18.13 with commit 640cea4c2839a821adfbb703b590a5928abe9286
	Issue introduced in 5.4 with commit 39b07096364a42c516415d5f841069e885234e61 and fixed in 5.19 with commit d2ee2cfc4aa85ff6a2a3b198a3a524ec54e3d999

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-2022-49643
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:
	security/integrity/ima/ima_appraise.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/388f3df7c3c8b7f2a32b9ae0a9b2f9f6ad3b1b77
	https://git.kernel.org/stable/c/831e190175f10652be93b08436cc7bf2e62e4bb6
	https://git.kernel.org/stable/c/c8d5d81940938b5f6c0f495ca9538e7740416f30
	https://git.kernel.org/stable/c/640cea4c2839a821adfbb703b590a5928abe9286
	https://git.kernel.org/stable/c/d2ee2cfc4aa85ff6a2a3b198a3a524ec54e3d999