CVE-2026-68197
wifi: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper
Description
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).
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Ensure bcn_ht_oper is not NULL before dereferencing it.
- Update the Linux kernel to include the fix.
- Review other driver code for similar pointer checks.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68197.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68197 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68197
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68197 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68197 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': 'eb42c3c8fd479166c42984728754cd779c71fd60', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': '45011e4d9ba3f2182e5df64be65888044fa20771', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': '9375a4ea4121625ef27a46b74781cda66a5cc61b', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': 'cca4398aa305c22016d1714f388e2fa6ea4e5ad4', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': 'c3d68e294cbb6a4090bb219d3dcaca85a011809b', 'versionType': 'git'}], 'programFiles': ['drivers/net/wireless/marvell/mwifiex/tdls.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wireless/marvell/mwifiex/tdls.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': 'eb42c3c8fd479166c42984728754cd779c71fd60', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': '45011e4d9ba3f2182e5df64be65888044fa20771', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': '9375a4ea4121625ef27a46b74781cda66a5cc61b', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': 'cca4398aa305c22016d1714f388e2fa6ea4e5ad4', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': 'c3d68e294cbb6a4090bb219d3dcaca85a011809b', 'versionType': 'git'}], 'programFiles': ['drivers/net/wireless/marvell/mwifiex/tdls.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wireless/marvell/mwifiex/tdls.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': 'eb42c3c8fd479166c42984728754cd779c71fd60', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': '45011e4d9ba3f2182e5df64be65888044fa20771', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': '9375a4ea4121625ef27a46b74781cda66a5cc61b', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': 'cca4398aa305c22016d1714f388e2fa6ea4e5ad4', 'versionType': 'git'}, {'status': 'affected', 'version': '396939f94084d5923d558e9f22db48bc51156e47', 'lessThan': 'c3d68e294cbb6a4090bb219d3dcaca85a011809b', 'versionType': 'git'}], 'programFiles': ['drivers/net/wireless/marvell/mwifiex/tdls.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wireless/marvell/mwifiex/tdls.c'], 'defaultStatus': 'affected'}] Added Description 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). Added Reference https://git.kernel.org/stable/c/45011e4d9ba3f2182e5df64be65888044fa20771 Added Reference https://git.kernel.org/stable/c/9375a4ea4121625ef27a46b74781cda66a5cc61b Added Reference https://git.kernel.org/stable/c/c3d68e294cbb6a4090bb219d3dcaca85a011809b Added Reference https://git.kernel.org/stable/c/cca4398aa305c22016d1714f388e2fa6ea4e5ad4 Added Reference https://git.kernel.org/stable/c/eb42c3c8fd479166c42984728754cd779c71fd60