CVE-2026-80732: ata: pata_sl82c105: fix bridge revision use-after-free

CVE-2026-80732: ata: pata_sl82c105: fix bridge revision use-after-free

[Greg Kroah-Hartman]

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

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

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

ata: pata_sl82c105: fix bridge revision use-after-free

pci_get_slot() returns a referenced PCI device. Commit 44c10138fd4b
("PCI: Change all drivers to use pci_device->revision") replaced a
configuration-space read with direct access to the cached revision field,
but left that access after pci_dev_put(). The bridge may therefore be freed
before its revision is read.

Read the revision before dropping the reference.

The Linux kernel CVE team has assigned CVE-2026-80732 to this issue.


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

	Issue introduced in 2.6.23 with commit 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 and fixed in 5.10.265 with commit 1268ca9418e2217f2b60705cf4a280b689b26678
	Issue introduced in 2.6.23 with commit 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 and fixed in 5.15.216 with commit a626dfca96041842053cf2d1efceb436c4cd8dcf
	Issue introduced in 2.6.23 with commit 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 and fixed in 6.1.183 with commit 5ef87b1b4656d675440ceab32a56e69ad958d3a1
	Issue introduced in 2.6.23 with commit 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 and fixed in 6.6.152 with commit fa0dca89b4fb0909ffda7b9ab6051af33270f95e
	Issue introduced in 2.6.23 with commit 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 and fixed in 6.12.104 with commit dc711fb137b33c12e6ca22b6a9c9b9f21d49e4de
	Issue introduced in 2.6.23 with commit 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 and fixed in 6.18.45 with commit a837deeaa37cc3f0e8c4e5c096787047f272c956
	Issue introduced in 2.6.23 with commit 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 and fixed in 7.1.9 with commit 56fd78c8c820f527f8003e379ab71004b2e79a44
	Issue introduced in 2.6.23 with commit 44c10138fd4bbc4b6d6bff0873c24902f2a9da65 and fixed in 7.2 with commit 7700a31039cdc6715cb6cce7e7a664ee4e945f67

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-2026-80732
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/pata_sl82c105.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/1268ca9418e2217f2b60705cf4a280b689b26678
	https://git.kernel.org/stable/c/a626dfca96041842053cf2d1efceb436c4cd8dcf
	https://git.kernel.org/stable/c/5ef87b1b4656d675440ceab32a56e69ad958d3a1
	https://git.kernel.org/stable/c/fa0dca89b4fb0909ffda7b9ab6051af33270f95e
	https://git.kernel.org/stable/c/dc711fb137b33c12e6ca22b6a9c9b9f21d49e4de
	https://git.kernel.org/stable/c/a837deeaa37cc3f0e8c4e5c096787047f272c956
	https://git.kernel.org/stable/c/56fd78c8c820f527f8003e379ab71004b2e79a44
	https://git.kernel.org/stable/c/7700a31039cdc6715cb6cce7e7a664ee4e945f67