linux-cve-announce - CVE-2025-21690: scsi: storvsc: Ratelimit warning logs to prevent VM denial of service

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Message-ID: <2025021055-CVE-2025-21690-e8ec@gregkh>
Date: Mon, 10 Feb 2025 16:58:58 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-21690: scsi: storvsc: Ratelimit warning logs to prevent VM denial of service

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

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

scsi: storvsc: Ratelimit warning logs to prevent VM denial of service

If there's a persistent error in the hypervisor, the SCSI warning for
failed I/O can flood the kernel log and max out CPU utilization,
preventing troubleshooting from the VM side. Ratelimit the warning so
it doesn't DoS the VM.

The Linux kernel CVE team has assigned CVE-2025-21690 to this issue.


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

	Fixed in 5.15.178 with commit 81d4dd05c412ba04f9f6b85b718e6da833be290c
	Fixed in 6.1.128 with commit 182a4b7c731e95c08cb47f14b87a272b6ab2b2da
	Fixed in 6.6.75 with commit 088bde862f8d3d0fc52e40e66a0484a246837087
	Fixed in 6.12.12 with commit 01d1ebdab9ccb73c952e1666a8a80abd194dbc55
	Fixed in 6.13.1 with commit d0f0af1bafef33b3e2aa8c3a4ef44db48df9b0ea
	Fixed in 6.14-rc1 with commit d2138eab8cde61e0e6f62d0713e45202e8457d6d

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-2025-21690
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/scsi/storvsc_drv.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/81d4dd05c412ba04f9f6b85b718e6da833be290c
	https://git.kernel.org/stable/c/182a4b7c731e95c08cb47f14b87a272b6ab2b2da
	https://git.kernel.org/stable/c/088bde862f8d3d0fc52e40e66a0484a246837087
	https://git.kernel.org/stable/c/01d1ebdab9ccb73c952e1666a8a80abd194dbc55
	https://git.kernel.org/stable/c/d0f0af1bafef33b3e2aa8c3a4ef44db48df9b0ea
	https://git.kernel.org/stable/c/d2138eab8cde61e0e6f62d0713e45202e8457d6d