linux-cve-announce - CVE-2025-39778: objtool, nvmet: Fix out-of-bounds stack access in nvmet_ctrl_state

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Message-ID: <2025041821-CVE-2025-39778-70fe@gregkh>
Date: Fri, 18 Apr 2025 09:02:29 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-39778: objtool, nvmet: Fix out-of-bounds stack access in nvmet_ctrl_state_show()

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

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

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

objtool, nvmet: Fix out-of-bounds stack access in nvmet_ctrl_state_show()

The csts_state_names[] array only has six sparse entries, but the
iteration code in nvmet_ctrl_state_show() iterates seven, resulting in a
potential out-of-bounds stack read.  Fix that.

Fixes the following warning with an UBSAN kernel:

  vmlinux.o: warning: objtool: .text.nvmet_ctrl_state_show: unexpected end of section

The Linux kernel CVE team has assigned CVE-2025-39778 to this issue.


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

	Issue introduced in 6.11 with commit 649fd41420a816b11b07423ebf4dbd4ac1ac2905 and fixed in 6.12.23 with commit 1adc93a525fdee8e2b311e6d5fd93eb69714ca05
	Issue introduced in 6.11 with commit 649fd41420a816b11b07423ebf4dbd4ac1ac2905 and fixed in 6.13.11 with commit 8fbf37a3577b4d64c150cafde338eee17b2f2ea4
	Issue introduced in 6.11 with commit 649fd41420a816b11b07423ebf4dbd4ac1ac2905 and fixed in 6.14.2 with commit 0cc0efc58d6c741b2868d4af24874d7fec28a575
	Issue introduced in 6.11 with commit 649fd41420a816b11b07423ebf4dbd4ac1ac2905 and fixed in 6.15-rc1 with commit 107a23185d990e3df6638d9a84c835f963fe30a6

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-2025-39778
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/nvme/target/debugfs.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/1adc93a525fdee8e2b311e6d5fd93eb69714ca05
	https://git.kernel.org/stable/c/8fbf37a3577b4d64c150cafde338eee17b2f2ea4
	https://git.kernel.org/stable/c/0cc0efc58d6c741b2868d4af24874d7fec28a575
	https://git.kernel.org/stable/c/107a23185d990e3df6638d9a84c835f963fe30a6