CVE-2026-68308: wifi: mt76: mt7996: check pointer returned by mt76_connac_get_he_phy_cap()

CVE-2026-68308: wifi: mt76: mt7996: check pointer returned by mt76_connac_get_he_phy_cap()

[Greg Kroah-Hartman]

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

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

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

wifi: mt76: mt7996: check pointer returned by mt76_connac_get_he_phy_cap()

mt76_connac_get_he_phy_cap routine can theoretically return NULL so
check cap pointer before dereferencing it.

The Linux kernel CVE team has assigned CVE-2026-68308 to this issue.


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

	Issue introduced in 6.2 with commit 98686cd21624c75a043e96812beadddf4f6f48e5 and fixed in 6.6.148 with commit 4fd85fd2373501b7386e93a5ce4a549d7c4e64e3
	Issue introduced in 6.2 with commit 98686cd21624c75a043e96812beadddf4f6f48e5 and fixed in 6.12.101 with commit 8b8a079e22ce9fc3c0d05b148ef67e4c6e576678
	Issue introduced in 6.2 with commit 98686cd21624c75a043e96812beadddf4f6f48e5 and fixed in 6.18.42 with commit d14238523ca4c6f5fcb54d1920eb2f8525a7711f
	Issue introduced in 6.2 with commit 98686cd21624c75a043e96812beadddf4f6f48e5 and fixed in 7.1.6 with commit 8bc7167e8a86489b7cb96a69cf1fb671d6df014b
	Issue introduced in 6.2 with commit 98686cd21624c75a043e96812beadddf4f6f48e5 and fixed in 7.2-rc5 with commit e858cf6bf99880343348ff1e8c942aaff1d9d592

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-2026-68308
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/mediatek/mt76/mt7996/mcu.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/4fd85fd2373501b7386e93a5ce4a549d7c4e64e3
	https://git.kernel.org/stable/c/8b8a079e22ce9fc3c0d05b148ef67e4c6e576678
	https://git.kernel.org/stable/c/d14238523ca4c6f5fcb54d1920eb2f8525a7711f
	https://git.kernel.org/stable/c/8bc7167e8a86489b7cb96a69cf1fb671d6df014b
	https://git.kernel.org/stable/c/e858cf6bf99880343348ff1e8c942aaff1d9d592