CVE-2026-68197

CVE CVE-2026-68197EUVD EUVD-2026-55298Published 2026-08-10T12:00:15.000Z

What the advisory describes

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).

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.42; 396939f94084d5923d558e9f22db48bc51156e47 <eb42c3c8fd479166c42984728754cd779c71fd60; patch: 6.12.101; 396939f94084d5923d558e9f22db48bc51156e47 <45011e4d9ba3f2182e5df64be65888044fa20771; 3.16; patch: 7.1.6; 396939f94084d5923d558e9f22db48bc51156e47 <cca4398aa305c22016d1714f388e2fa6ea4e5ad4; patch: 7.2-rc5; 396939f94084d5923d558e9f22db48bc51156e47 <c3d68e294cbb6a4090bb219d3dcaca85a011809b; 396939f94084d5923d558e9f22db48bc51156e47 <9375a4ea4121625ef27a46b74781cda66a5cc61b; patch: 0; patch: 6.6.148

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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