CVE-2026-68197

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

wifi: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper

mwifiex_tdls_add_ht_oper() gates its follow-the-AP-bandwidth path on

bss_desc->bcn_ht_cap being present, but then dereferences a different

pointer, bss_desc->bcn_ht_oper:

if (ISSUPP_CHANWIDTH40(priv->adapter->hw_dot_11n_dev_cap) &&

bss_desc->bcn_ht_cap &&

ISALLOWED_CHANWIDTH40(bss_desc->bcn_ht_oper->ht_param))

bcn_ht_cap and bcn_ht_oper are populated independently while parsing the

associated AP's beacon in mwifiex_update_bss_desc_with_ie(): an AP that

advertises an HT Capabilities element but no HT Operation element leaves

bcn_ht_cap non-NULL and bcn_ht_oper NULL. Setting up a TDLS link to a

peer while associated to such an AP then dereferences the NULL

bcn_ht_oper and crashes the kernel. Every other bcn_ht_oper user in the

driver NULL-checks it first.

Guard on the pointer that is actually dereferenced.

Found by 0sec automated security-research tooling (https://0sec.ai).