{"id":"CVE-2026-68197","title":"wifi: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper\n\nmwifiex_tdls_add_ht_oper() gates its follow-the-AP-bandwidth path on\nbss_desc->bcn_ht_cap bei…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < e1770f7410b4232a0267924f99751dc9c5ca31af","Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < 8c2058717fd06f05d421c2d3adf1dff3c3abcda1","Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < fba7eb7b248ea0618235f504158b685d752a153a","Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < eb42c3c8fd479166c42984728754cd779c71fd60","Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < 45011e4d9ba3f2182e5df64be65888044fa20771","Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < 9375a4ea4121625ef27a46b74781cda66a5cc61b","Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < cca4398aa305c22016d1714f388e2fa6ea4e5ad4","Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < c3d68e294cbb6a4090bb219d3dcaca85a011809b","Linux 3.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:44:24.447783Z"},"published":"2026-08-10","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:45:01.610Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68197","references":[{"url":"https://git.kernel.org/stable/c/e1770f7410b4232a0267924f99751dc9c5ca31af"},{"url":"https://git.kernel.org/stable/c/8c2058717fd06f05d421c2d3adf1dff3c3abcda1"},{"url":"https://git.kernel.org/stable/c/fba7eb7b248ea0618235f504158b685d752a153a"},{"url":"https://git.kernel.org/stable/c/eb42c3c8fd479166c42984728754cd779c71fd60"},{"url":"https://git.kernel.org/stable/c/45011e4d9ba3f2182e5df64be65888044fa20771"},{"url":"https://git.kernel.org/stable/c/9375a4ea4121625ef27a46b74781cda66a5cc61b"},{"url":"https://git.kernel.org/stable/c/cca4398aa305c22016d1714f388e2fa6ea4e5ad4"},{"url":"https://git.kernel.org/stable/c/c3d68e294cbb6a4090bb219d3dcaca85a011809b"}],"tags":["cve.org"],"epss":0.00216,"epssPercentile":0.12143,"ingestedAt":"2026-11-06T16:57:43.134Z","slug":"CVE-2026-68197","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper\n\nmwifiex_tdls_add_ht_oper() gates its follow-the-AP-bandwidth path on\nbss_desc->bcn_ht_cap being present, but then dereferences a different\npointer, bss_desc->bcn_ht_oper:\n\n\tif (ISSUPP_CHANWIDTH40(priv->adapter->hw_dot_11n_dev_cap) &&\n\t    bss_desc->bcn_ht_cap &&\n\t    ISALLOWED_CHANWIDTH40(bss_desc->bcn_ht_oper->ht_param))\n\nbcn_ht_cap and bcn_ht_oper are populated independently while parsing the\nassociated AP's beacon in mwifiex_update_bss_desc_with_ie(): an AP that\nadvertises an HT Capabilities element but no HT Operation element leaves\nbcn_ht_cap non-NULL and bcn_ht_oper NULL. Setting up a TDLS link to a\npeer while associated to such an AP then dereferences the NULL\nbcn_ht_oper and crashes the kernel. Every other bcn_ht_oper user in the\ndriver NULL-checks it first.\n\nGuard on the pointer that is actually dereferenced.\n\nFound by 0sec automated security-research tooling (https://0sec.ai).\n\n## Affected\n\n- `Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < e1770f7410b4232a0267924f99751dc9c5ca31af`\n- `Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < 8c2058717fd06f05d421c2d3adf1dff3c3abcda1`\n- `Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < fba7eb7b248ea0618235f504158b685d752a153a`\n- `Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < eb42c3c8fd479166c42984728754cd779c71fd60`\n- `Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < 45011e4d9ba3f2182e5df64be65888044fa20771`\n- `Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < 9375a4ea4121625ef27a46b74781cda66a5cc61b`\n- `Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < cca4398aa305c22016d1714f388e2fa6ea4e5ad4`\n- `Linux >= 396939f94084d5923d558e9f22db48bc51156e47 < c3d68e294cbb6a4090bb219d3dcaca85a011809b`\n- `Linux 3.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}