CVE-2026-68406: wifi: cfg80211: validate PMSR FTM preamble range

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

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

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

wifi: cfg80211: validate PMSR FTM preamble range

PMSR FTM request parsing accepts preamble values outside the
enumerated nl80211 preamble range.

Reject out-of-range values before using them in the parser capability
bit test using the policy.

[drop unnecessary check]

The Linux kernel CVE team has assigned CVE-2026-68406 to this issue.


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

	Issue introduced in 5.0 with commit 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and fixed in 6.6.148 with commit 44ea65d779e2d23b2264fea6af2d0c666a3ec9fb
	Issue introduced in 5.0 with commit 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and fixed in 6.12.101 with commit 922d71fbaf99c1d5318151a0cb0a42ad448d07d9
	Issue introduced in 5.0 with commit 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and fixed in 6.18.42 with commit cfbda103aeae61071a122a6fc2bfe98cffbd7165
	Issue introduced in 5.0 with commit 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and fixed in 7.1.6 with commit 58320cb47df2accc7a20bb72c0150280732fa58f
	Issue introduced in 5.0 with commit 9bb7e0f24e7e7d00daa1219b14539e2e602649b2 and fixed in 7.2-rc4 with commit 36230936468f0ba4930e94aef496fc229d4bb951

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-2026-68406
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:
	net/wireless/nl80211.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/44ea65d779e2d23b2264fea6af2d0c666a3ec9fb
	https://git.kernel.org/stable/c/922d71fbaf99c1d5318151a0cb0a42ad448d07d9
	https://git.kernel.org/stable/c/cfbda103aeae61071a122a6fc2bfe98cffbd7165
	https://git.kernel.org/stable/c/58320cb47df2accc7a20bb72c0150280732fa58f
	https://git.kernel.org/stable/c/36230936468f0ba4930e94aef496fc229d4bb951