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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93806
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-24 17:17:13 UTC
Updated2026-10-03 11:17:50 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.002540000 probability, percentile 0.153550000 (date 2026-10-05)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 6829c878ecd24ff0ae41b4668c7e9d0f11b66942 3bcaaaa4ad334053ceea2ea2f0623f22afe2e1ac git Not specified
CNA Linux Linux affected 6829c878ecd24ff0ae41b4668c7e9d0f11b66942 71be658246c903b9e96976a23c23800675896a1b git Not specified
CNA Linux Linux affected 6829c878ecd24ff0ae41b4668c7e9d0f11b66942 a57310600c1e2b9ada0f37c96e8f48aef47d3093 git Not specified
CNA Linux Linux affected 6829c878ecd24ff0ae41b4668c7e9d0f11b66942 78ac450ad4624d6b2999cb4eeb28916767f81247 git Not specified
CNA Linux Linux affected 6829c878ecd24ff0ae41b4668c7e9d0f11b66942 b760113aeca2e9362d56bf9e9263373ffe6c8eb3 git Not specified
CNA Linux Linux affected 2.6.32 Not specified
CNA Linux Linux unaffected 2.6.32 semver Not specified
CNA Linux Linux unaffected 6.1.189 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.158 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/71be658246c903b9e96976a23c23800675896a1b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a57310600c1e2b9ada0f37c96e8f48aef47d3093 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/78ac450ad4624d6b2999cb4eeb28916767f81247 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b760113aeca2e9362d56bf9e9263373ffe6c8eb3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3bcaaaa4ad334053ceea2ea2f0623f22afe2e1ac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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