linux-cve-announce - CVE-2022-50879: objtool: Fix SEGFAULT

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Message-ID: <2025123024-CVE-2022-50879-47a7@gregkh>
Date: Tue, 30 Dec 2025 13:23:28 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50879: objtool: Fix SEGFAULT

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

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

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

objtool: Fix SEGFAULT

find_insn() will return NULL in case of failure. Check insn in order
to avoid a kernel Oops for NULL pointer dereference.

The Linux kernel CVE team has assigned CVE-2022-50879 to this issue.


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

	Fixed in 5.4.229 with commit 418ef921cce2d7415fab7e3e93529227f239e4bb
	Fixed in 5.10.163 with commit 0af0e115ff59d638f45416a004cdd8edb38db40c
	Fixed in 5.15.87 with commit 23a249b1185cdd5bfb6971d1608ba49e589f2288
	Fixed in 6.0.17 with commit 38b9415abbd703438ebbc6fb74990bd0fbddc5b9
	Fixed in 6.1.3 with commit fcee8a2d4db404a93e690d79e7273b6ef9d33575
	Fixed in 6.2 with commit efb11fdb3e1a9f694fa12b70b21e69e55ec59c36

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-2022-50879
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:
	tools/objtool/check.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/418ef921cce2d7415fab7e3e93529227f239e4bb
	https://git.kernel.org/stable/c/0af0e115ff59d638f45416a004cdd8edb38db40c
	https://git.kernel.org/stable/c/23a249b1185cdd5bfb6971d1608ba49e589f2288
	https://git.kernel.org/stable/c/38b9415abbd703438ebbc6fb74990bd0fbddc5b9
	https://git.kernel.org/stable/c/fcee8a2d4db404a93e690d79e7273b6ef9d33575
	https://git.kernel.org/stable/c/efb11fdb3e1a9f694fa12b70b21e69e55ec59c36