Description
In the Linux kernel, the following vulnerability has been resolved:

wifi: cfg80211: validate EHT MLE before MLD ID read

cfg80211_gen_new_ie() copies ML probe response elements from
the parent frame when the parent EHT multi-link element has an
MLD ID matching the nontransmitted BSSID index.

The code only checked that the extension element had more than
one byte before calling ieee80211_mle_get_mld_id(). That helper
assumes a BASIC MLE with enough common info and documents that
callers must first use ieee80211_mle_type_ok().

Attack chain:
malicious AP sends a short EHT MLE in an MBSSID beacon.
cfg80211_inform_bss_frame_data() stores the copied IE buffer.
cfg80211_parse_mbssid_data() builds the nontransmitted BSS IE.
cfg80211_gen_new_ie() sees the EHT MLE in the parent frame.
ieee80211_mle_get_mld_id() then reads past the IE boundary.

Validate the MLE type and size before reading the MLD ID. This
matches the contract required by the MLE helper and rejects the
short element before any internal MLE fields are accessed.
Published: 2026-08-15
Score: n/a
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

This flaw allows a remote attacker to trigger an out‑of‑bounds read in the Linux kernel’s WiFi subsystem by sending a malicious beacon that contains a truncated EHT Multi‑Link Element (MLE). The kernel code incorrectly assumes the MLE is a standard BASIC form, validating only length before accessing its fields. The resulting memory read can expose sensitive data or trigger a crash, undermining confidentiality or availability, but does not provide direct code execution.

Affected Systems

All Linux kernels containing the cfg80211 WiFi stack before the patch are affected, regardless of vendor distribution. No specific version range is listed.

Risk and Exploitability

The vulnerability has no publicly disclosed CVSS score but has an EPSS score of less than 1%, indicating a low probability of exploitation. It is not listed in the CISA KEV catalog. Attackers would need to position a rogue access point within radio range, making the damage confined to devices in the same WiFi environment. The exploit path relies purely on the victim’s WiFi receiver parsing the beacon, so no additional host privileges are required.

Generated by OpenCVE AI on August 15, 2026 at 22:06 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the patch that adds validation of the EHT MLE type and size before reading the MLD ID to the Linux kernel source and rebuild, or install a distribution kernel that includes the fix
  • Restart the affected systems to load the patched kernel module
  • If the distribution does not yet ship a patched kernel, coordinate with the vendor to provide a backport of the patch

Generated by OpenCVE AI on August 15, 2026 at 22:06 UTC.

Tracking

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Advisories

No advisories yet.

History

Sat, 15 Aug 2026 22:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
CWE-20

Sat, 15 Aug 2026 06:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: validate EHT MLE before MLD ID read cfg80211_gen_new_ie() copies ML probe response elements from the parent frame when the parent EHT multi-link element has an MLD ID matching the nontransmitted BSSID index. The code only checked that the extension element had more than one byte before calling ieee80211_mle_get_mld_id(). That helper assumes a BASIC MLE with enough common info and documents that callers must first use ieee80211_mle_type_ok(). Attack chain: malicious AP sends a short EHT MLE in an MBSSID beacon. cfg80211_inform_bss_frame_data() stores the copied IE buffer. cfg80211_parse_mbssid_data() builds the nontransmitted BSS IE. cfg80211_gen_new_ie() sees the EHT MLE in the parent frame. ieee80211_mle_get_mld_id() then reads past the IE boundary. Validate the MLE type and size before reading the MLD ID. This matches the contract required by the MLE helper and rejects the short element before any internal MLE fields are accessed.
Title wifi: cfg80211: validate EHT MLE before MLD ID read
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:51:29.634Z

Reserved: 2026-07-30T09:28:09.396Z

Link: CVE-2026-68472

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:20:05.570

Modified: 2026-08-15T06:20:05.570

Link: CVE-2026-68472

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T22:15:04Z

Weaknesses
  • CWE-119

    Improper Restriction of Operations within the Bounds of a Memory Buffer

  • CWE-20

    Improper Input Validation