CVE-2026-68352: wifi: ath6kl: fix OOB read from firmware IE lengths in connect event

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

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

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

wifi: ath6kl: fix OOB read from firmware IE lengths in connect event

The firmware-controlled beacon_ie_len, assoc_req_len, and assoc_resp_len
fields in ath6kl_wmi_connect_event_rx() are not validated against the
buffer length. Their sum (up to 765) can exceed the actual WMI event
data, causing out-of-bounds reads during IE parsing and state corruption
of wmi->is_wmm_enabled.

Add a check that the total IE length fits within the buffer.

The Linux kernel CVE team has assigned CVE-2026-68352 to this issue.


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

	Issue introduced in 3.2 with commit bdcd81707973cf8aa9305337166f8ee842a050d4 and fixed in 6.6.148 with commit 1c690f7c4c5b37108ac8c98b94ce1b3c655a4f5e
	Issue introduced in 3.2 with commit bdcd81707973cf8aa9305337166f8ee842a050d4 and fixed in 6.12.101 with commit d70c0a850c21b57a6f46ce363860203389bbeaa6
	Issue introduced in 3.2 with commit bdcd81707973cf8aa9305337166f8ee842a050d4 and fixed in 6.18.42 with commit 33b5342d2080657054ddf89ef1199b426a37dae8
	Issue introduced in 3.2 with commit bdcd81707973cf8aa9305337166f8ee842a050d4 and fixed in 7.1.6 with commit 94e1bfcefe8264a207c2fda2febb954e70a34b42
	Issue introduced in 3.2 with commit bdcd81707973cf8aa9305337166f8ee842a050d4 and fixed in 7.2-rc5 with commit 6b47b29730de3232b919d8362749f6814c5f2a33

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-2026-68352
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/net/wireless/ath/ath6kl/wmi.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/1c690f7c4c5b37108ac8c98b94ce1b3c655a4f5e
	https://git.kernel.org/stable/c/d70c0a850c21b57a6f46ce363860203389bbeaa6
	https://git.kernel.org/stable/c/33b5342d2080657054ddf89ef1199b426a37dae8
	https://git.kernel.org/stable/c/94e1bfcefe8264a207c2fda2febb954e70a34b42
	https://git.kernel.org/stable/c/6b47b29730de3232b919d8362749f6814c5f2a33