Bug 2516359 (CVE-2026-68472)

Summary: CVE-2026-68472 kernel: wifi: cfg80211: validate EHT MLE before MLD ID read
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's cfg80211 Wi-Fi subsystem. A remote attacker, by operating a malicious Access Point (AP), could send a specially crafted EHT Multi-Link Element (MLE) in an MBSSID beacon. This could cause the kernel to read beyond the intended memory boundary when processing the MLE, potentially leading to information disclosure or a denial of service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-15 06:08:22 UTC 
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.
Comment 1 Keith Grant 2026-08-17 14:22:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081505-CVE-2026-68472-2865@gregkh/T