Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: validate assoc response length before status and IE access cfg80211_rx_assoc_resp() initialises the status and response-IE fields of cfg80211_connect_resp_params from the management frame before proving that the frame is long enough for those offsets. S1G and regular association responses also have different IE offsets, but the S1G path only patched resp_ie after the unsafe initialiser had already run. Defer resp_ie, resp_ie_len, and status to after the link-iteration loop. Use a bool to remember whether the frame is S1G, then validate the appropriate minimum length and set all three fields in a single if/else block. Funnel short-frame and SME-reject cleanup through a shared free_bss label for the abandon paths.

Affected versions

Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before a57310600c1e2b9ada0f37c96e8f48aef47d3093 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before 78ac450ad4624d6b2999cb4eeb28916767f81247 (git); 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 through before b760113aeca2e9362d56bf9e9263373ffe6c8eb3 (git); before 6.12.111 (semver); before 6.18.53 (semver) 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.