Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: reject duplicate wiphy cipher suite entries Duplicate entries in wiphy->cipher_suites do not describe any additional capability, but cfg80211 currently accepts them and leaves individual consumers to deal with them. One such consumer is the WEXT compatibility code, which appends a WEP key length for each WEP cipher entry it sees. Repeated WEP entries can therefore overflow the fixed iw_range::encoding_size array returned by SIOCGIWRANGE. Reject duplicate cipher suite entries in wiphy_register() instead. This keeps the cipher suite invariant in one place and makes malformed wiphy descriptions fail early with -EINVAL, rather than relying on a single cfg80211 user to handle duplicates correctly.

Affected versions

Linux: 2ab658f9ce218ae93b3d2db2b3fe68bfefb81196 through before 1305f8b925fe92edf5fec183588dfc7db719180b (git); 2ab658f9ce218ae93b3d2db2b3fe68bfefb81196 through before 4cbb2360f4d8c29e67bc7a8bf6ba0ae096583923 (git); 2ab658f9ce218ae93b3d2db2b3fe68bfefb81196 through before 7187d145d9042b037e4f10538f70cf95e380219f (git); 2.6.32 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.