linux-cve-announce - CVE-2025-38239: scsi: megaraid

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Message-ID: <2025070933-CVE-2025-38239-678a@gregkh>
Date: Wed,  9 Jul 2025 12:42:32 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38239: scsi: megaraid_sas: Fix invalid node index

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

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

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

scsi: megaraid_sas: Fix invalid node index

On a system with DRAM interleave enabled, out-of-bound access is
detected:

megaraid_sas 0000:3f:00.0: requested/available msix 128/128 poll_queue 0
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in ./arch/x86/include/asm/topology.h:72:28
index -1 is out of range for type 'cpumask *[1024]'
dump_stack_lvl+0x5d/0x80
ubsan_epilogue+0x5/0x2b
__ubsan_handle_out_of_bounds.cold+0x46/0x4b
megasas_alloc_irq_vectors+0x149/0x190 [megaraid_sas]
megasas_probe_one.cold+0xa4d/0x189c [megaraid_sas]
local_pci_probe+0x42/0x90
pci_device_probe+0xdc/0x290
really_probe+0xdb/0x340
__driver_probe_device+0x78/0x110
driver_probe_device+0x1f/0xa0
__driver_attach+0xba/0x1c0
bus_for_each_dev+0x8b/0xe0
bus_add_driver+0x142/0x220
driver_register+0x72/0xd0
megasas_init+0xdf/0xff0 [megaraid_sas]
do_one_initcall+0x57/0x310
do_init_module+0x90/0x250
init_module_from_file+0x85/0xc0
idempotent_init_module+0x114/0x310
__x64_sys_finit_module+0x65/0xc0
do_syscall_64+0x82/0x170
entry_SYSCALL_64_after_hwframe+0x76/0x7e

Fix it accordingly.

The Linux kernel CVE team has assigned CVE-2025-38239 to this issue.


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

	Issue introduced in 5.17 with commit 8049da6f3943d0ac51931b8064b2e4769a69a967 and fixed in 6.1.143 with commit f1064b3532192e987ab17be7281d5fee36fd25e1
	Issue introduced in 5.17 with commit 8049da6f3943d0ac51931b8064b2e4769a69a967 and fixed in 6.6.96 with commit bf2c1643abc3b2507d56bb6c22bf9897272f8a35
	Issue introduced in 5.17 with commit 8049da6f3943d0ac51931b8064b2e4769a69a967 and fixed in 6.12.36 with commit 19a47c966deb36624843b7301f0373a3dc541a05
	Issue introduced in 5.17 with commit 8049da6f3943d0ac51931b8064b2e4769a69a967 and fixed in 6.15.5 with commit 074efb35552556a4b3b25eedab076d5dc24a8199
	Issue introduced in 5.17 with commit 8049da6f3943d0ac51931b8064b2e4769a69a967 and fixed in 6.16-rc4 with commit 752eb816b55adb0673727ba0ed96609a17895654

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-2025-38239
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/megaraid/megaraid_sas_base.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/f1064b3532192e987ab17be7281d5fee36fd25e1
	https://git.kernel.org/stable/c/bf2c1643abc3b2507d56bb6c22bf9897272f8a35
	https://git.kernel.org/stable/c/19a47c966deb36624843b7301f0373a3dc541a05
	https://git.kernel.org/stable/c/074efb35552556a4b3b25eedab076d5dc24a8199
	https://git.kernel.org/stable/c/752eb816b55adb0673727ba0ed96609a17895654