CVE-2026-97518

/// Technical description

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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References