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

CVE-2026-93806
HIGH 8.8

At a glance

Source
NVD
EPSS
EPSS 0.25 % · percentile 17 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Received

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.

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

European references

CERT-FR advisories

Affected products

ProductVersions
Linux · Linuxaffected 6829c878ecd24ff0ae41b4668c7e9d0f11b66942 < 3bcaaaa4ad334053ceea2ea2f0623f22afe2e1ac ; affected 6829c878ecd24ff0ae41b4668c7e9d0f11b66942 < 71be658246c903b9e96976a23c23800675896a1b ; affected 6829c878ecd24ff0ae41b4668c7e9d0f11b66942 < a57310600c1e2b9ada0f37c96e8f48aef47d3093 ; affected 6829c878ecd24ff0ae41b4668c7e9d0f11b66942 < 78ac450ad4624d6b2999cb4eeb28916767f81247 ; affected 6829c878ecd24ff0ae41b4668c7e9d0f11b66942 < b760113aeca2e9362d56bf9e9263373ffe6c8eb3
Linux · Linuxaffected 2.6.32 ; unaffected 0 < 2.6.32 ; unaffected 6.1.189 ≤ 6.1.* ; unaffected 6.6.158 ≤ 6.6.* ; unaffected 6.12.111 ≤ 6.12.* ; unaffected 6.18.53 ≤ 6.18.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD