CVE-2026-68350: wifi: carl9170: fix OOB read from off-by-two in TX status handler

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

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

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

wifi: carl9170: fix OOB read from off-by-two in TX status handler

The bounds check in carl9170_tx_process_status() uses
`i > ((cmd->hdr.len / 2) + 1)` which is off by two, allowing
2 extra iterations past valid _tx_status entries when the firmware-
controlled hdr.ext exceeds hdr.len/2. Fix by using the correct
comparison `i >= (cmd->hdr.len / 2)`.

The Linux kernel CVE team has assigned CVE-2026-68350 to this issue.


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

	Issue introduced in 2.6.37 with commit a84fab3cbfdc427e7d366f1cc844f27b2084c26c and fixed in 6.6.148 with commit 7ed0dce8613c92111d2a3836ced2ab03190ba20e
	Issue introduced in 2.6.37 with commit a84fab3cbfdc427e7d366f1cc844f27b2084c26c and fixed in 6.12.101 with commit e8a862a3da457ddc50633c346dc645d559da09ae
	Issue introduced in 2.6.37 with commit a84fab3cbfdc427e7d366f1cc844f27b2084c26c and fixed in 6.18.42 with commit fab6ff91d5b8c4af62e2ced42fb357fa3eb9fd59
	Issue introduced in 2.6.37 with commit a84fab3cbfdc427e7d366f1cc844f27b2084c26c and fixed in 7.1.6 with commit 423c836f934814b8fdbe53b24a79d021a0ee8454
	Issue introduced in 2.6.37 with commit a84fab3cbfdc427e7d366f1cc844f27b2084c26c and fixed in 7.2-rc5 with commit a3f42f1049ad80c65560d2b078ad426c3134f78d

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-2026-68350
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/carl9170/tx.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/7ed0dce8613c92111d2a3836ced2ab03190ba20e
	https://git.kernel.org/stable/c/e8a862a3da457ddc50633c346dc645d559da09ae
	https://git.kernel.org/stable/c/fab6ff91d5b8c4af62e2ced42fb357fa3eb9fd59
	https://git.kernel.org/stable/c/423c836f934814b8fdbe53b24a79d021a0ee8454
	https://git.kernel.org/stable/c/a3f42f1049ad80c65560d2b078ad426c3134f78d