wifi: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper
Key facts
- Attack vector
- —
- Privileges required
- —
- User interaction
- —
- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
- —
- Fix status
- Partial Red Hat: 3 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
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).
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 2 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-68197
- 2026-10-03 Alias added: GHSA-fw9r-2mhq-c5mq
- 2026-11-06 CISA SSVC decision points changed
References
Other 8
- https://git.kernel.org/stable/c/e1770f7410b4232a0267924f99751dc9c5ca31af
- https://git.kernel.org/stable/c/8c2058717fd06f05d421c2d3adf1dff3c3abcda1
- https://git.kernel.org/stable/c/fba7eb7b248ea0618235f504158b685d752a153a
- https://git.kernel.org/stable/c/eb42c3c8fd479166c42984728754cd779c71fd60
- https://git.kernel.org/stable/c/45011e4d9ba3f2182e5df64be65888044fa20771
- https://git.kernel.org/stable/c/9375a4ea4121625ef27a46b74781cda66a5cc61b
- https://git.kernel.org/stable/c/cca4398aa305c22016d1714f388e2fa6ea4e5ad4
- https://git.kernel.org/stable/c/c3d68e294cbb6a4090bb219d3dcaca85a011809b
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Sources
- CVE-2026-68197 · CVE Program
- CVE-2026-68197 · NVD
- FIRST EPSS
- GHSA-fw9r-2mhq-c5mq · GitHub Advisory Database · CC BY 4.0
- CVE-2026-68197 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences