On Mon, Jun 15, 2026 at 03:20:58PM +0300, Nazar Kalashnikov wrote:

From: Johannes Berg <redacted>

commit 58192b9ce09b0f0f86e2036683bd542130b91a98 upstream.

If the firmware were to report three LMACs (which doesn't
exist in hardware) then using "fwrt->smem_cfg.lmac[2]" is
an overrun of the array. Reject such and use IWL_FW_CHECK
instead of WARN_ON in this function.

Signed-off-by: Johannes Berg <redacted>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20251110150012.16e8c2d70c26.Iadfcc1aedf43c5175b3f0757bea5aa232454f1ac@changeid
Signed-off-by: Nazar Kalashnikov <redacted>
---
Backport fix for CVE-2026-43172
 drivers/net/wireless/intel/iwlwifi/fw/smem.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

This breaks the build, how did you test it?

thanks,

greg k-h