wifi: cfg80211: validate assoc response length before status and IE access (CVE-2026-93806) | HOL Guard CVE

High · CVSS 8.8CVE-2026-93806

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

Answer in brief

CVE-2026-93806 records a High severity (CVSS 8.8) vulnerability in wifi: cfg80211: validate assoc response length before status and IE access. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 24, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a57310600c1e2b9ada0f37c96e8f48aef47d3093 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <78ac450ad4624d6b2999cb4eeb28916767f81247 \|\| >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b760113aeca2e9362d56bf9e9263373ffe6c8eb3 \|\| >=0 <6.12.111 \|\| >=0 <6.18.53	a57310600c1e2b9ada0f37c96e8f48aef47d3093, 78ac450ad4624d6b2999cb4eeb28916767f81247, b760113aeca2e9362d56bf9e9263373ffe6c8eb3, 6.12.111, 6.18.53

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux.
Review the reported fix. Update Linux/Linux to a57310600c1e2b9ada0f37c96e8f48aef47d3093 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.