CVE-2026-68395: ata: sata_dwc_460ex: enable SATA interrupts only after IRQ handler is registered

CVE-2026-68395: ata: sata_dwc_460ex: enable SATA interrupts only after IRQ handler is registered

[Greg Kroah-Hartman]

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

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

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

ata: sata_dwc_460ex: enable SATA interrupts only after IRQ handler is registered

sata_dwc_enable_interrupts() is called before platform_get_irq() and
ata_host_activate(), leaving the SATA controller's interrupt mask
enabled without a registered handler.  If a later step fails (irq
request, phy init, etc.) or if the controller asserts an interrupt
during probe, the irq line may fire with no handler, causing a
spurious interrupt storm.

Move sata_dwc_enable_interrupts() after ata_host_activate() so that
interrupts are only unmasked once the handler is registered and the
core is fully initialized.

The Linux kernel CVE team has assigned CVE-2026-68395 to this issue.


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

	Issue introduced in 2.6.36 with commit 62936009f35a6659cc3ebe0d90c754182d60da73 and fixed in 6.6.148 with commit fbe7df5d3a3aed2456667a4825e4ff98d6df6ca4
	Issue introduced in 2.6.36 with commit 62936009f35a6659cc3ebe0d90c754182d60da73 and fixed in 6.12.101 with commit 23d4c50fdc0dfe3ad4f9647a3b7d486de807dcda
	Issue introduced in 2.6.36 with commit 62936009f35a6659cc3ebe0d90c754182d60da73 and fixed in 6.18.42 with commit daa80b422ed920a3c0c45153020b0ad7af7fb5a5
	Issue introduced in 2.6.36 with commit 62936009f35a6659cc3ebe0d90c754182d60da73 and fixed in 7.1.6 with commit 5d0797d6940b8dc894f950c52f7af0b42cb55ed0
	Issue introduced in 2.6.36 with commit 62936009f35a6659cc3ebe0d90c754182d60da73 and fixed in 7.2-rc4 with commit 4bbc16a353a98023e5ddfca7c1fc0e49971cf4d0

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-2026-68395
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/ata/sata_dwc_460ex.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/fbe7df5d3a3aed2456667a4825e4ff98d6df6ca4
	https://git.kernel.org/stable/c/23d4c50fdc0dfe3ad4f9647a3b7d486de807dcda
	https://git.kernel.org/stable/c/daa80b422ed920a3c0c45153020b0ad7af7fb5a5
	https://git.kernel.org/stable/c/5d0797d6940b8dc894f950c52f7af0b42cb55ed0
	https://git.kernel.org/stable/c/4bbc16a353a98023e5ddfca7c1fc0e49971cf4d0