CVE-2026-93806

wifi: cfg80211: validate assoc response length before status and IE access

HIGH
8.8
CVSS Score
Published: September 24, 2026 at 04:02 PM UTC
Updated: October 3, 2026 at 11:17 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 0.3%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.6.32 ≤ v < 6.1.1892.6.32 ≤ v < 6.12.1112.6.32 ≤ v < 6.18.532.6.32 ≤ v < 6.6.1582.6.32 ≤ v < 7.22.6.326829c878ecd24ff0ae41b4668c7e9d0f11b66942
Vendor states this is fixed in 3bcaaaa4ad334053ceea2ea2f0623f22afe2e1ac (fixed)
Vendor states this is fixed in 71be658246c903b9e96976a23c23800675896a1b (fixed)
Vendor states this is fixed in 78ac450ad4624d6b2999cb4eeb28916767f81247 (fixed)
Vendor states this is fixed in a57310600c1e2b9ada0f37c96e8f48aef47d3093 (fixed)
Vendor states this is fixed in b760113aeca2e9362d56bf9e9263373ffe6c8eb3 (fixed)
Vendor states this is fixed in 2.6.32 (unaffected)
Vendor states this is fixed in 6.1.189 (unaffected)
Vendor states this is fixed in 6.12.111 (unaffected)
Vendor states this is fixed in 6.18.53 (unaffected)
Vendor states this is fixed in 6.6.158 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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