CVE-2026-64305: crypto: qat - protect service table iterations with service_lock

From: Greg Kroah-Hartman <[email protected]>

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

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

crypto: qat - protect service table iterations with service_lock

The service_table list is protected by service_lock when entries are
added or removed (in adf_service_add() and adf_service_remove()), but
several functions iterate over the list without holding this lock.

A concurrent adf_service_register() or adf_service_unregister() call
could modify the list during traversal, leading to list corruption or
a use-after-free.

Fix this by holding service_lock across all list_for_each_entry()
iterations of service_table in adf_dev_init(), adf_dev_start(),
adf_dev_stop(), adf_dev_shutdown(), adf_dev_restarting_notify(),
adf_dev_restarted_notify(), and adf_error_notifier().

The lock ordering is safe: callers of the static helpers (adf_dev_up()
and adf_dev_down()) acquire state_lock before service_lock, and no
event_hld callback or service_lock holder ever acquires state_lock in
the reverse order.

The Linux kernel CVE team has assigned CVE-2026-64305 to this issue.


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

	Issue introduced in 3.17 with commit d8cba25d2c68992a6e7c1d329b690a9ebe01167d and fixed in 6.12.96 with commit 222fa7b453b612f4407f260146d89a2ce2bc831d
	Issue introduced in 3.17 with commit d8cba25d2c68992a6e7c1d329b690a9ebe01167d and fixed in 6.18.39 with commit c3c5925791cff3b84d313293fd60f384d877d793
	Issue introduced in 3.17 with commit d8cba25d2c68992a6e7c1d329b690a9ebe01167d and fixed in 7.1.4 with commit 0dbcecea740d943002c1cbdafa39bdfc108e32a5
	Issue introduced in 3.17 with commit d8cba25d2c68992a6e7c1d329b690a9ebe01167d and fixed in 7.2-rc1 with commit 5c6f845e77ec35f9b7b047cc8f9789bf397cdd3e

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-2026-64305
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/crypto/intel/qat/qat_common/adf_init.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/222fa7b453b612f4407f260146d89a2ce2bc831d
	https://git.kernel.org/stable/c/c3c5925791cff3b84d313293fd60f384d877d793
	https://git.kernel.org/stable/c/0dbcecea740d943002c1cbdafa39bdfc108e32a5
	https://git.kernel.org/stable/c/5c6f845e77ec35f9b7b047cc8f9789bf397cdd3e