Bug 2513220 (CVE-2026-68407)

Summary: CVE-2026-68407 kernel: wifi: nl80211: free RNR data on MBSSID mismatch
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's Wi-Fi subsystem (nl80211). When processing beacon frames, the `nl80211_parse_beacon()` function may fail to properly free allocated RNR (Reduced Neighbor Report) data if there is a mismatch in the number of RNR and MBSSID (Multiple Basic Service Set Identifier) entries. This improper memory handling could lead to a memory leak, potentially allowing a remote attacker to cause a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-10 12:25:34 UTC
In the Linux kernel, the following vulnerability has been resolved:

wifi: nl80211: free RNR data on MBSSID mismatch

nl80211_parse_beacon() rejects EMA RNR data when there are fewer RNR
entries than MBSSID entries.

The rejected RNR allocation has not been attached to the beacon data yet,
so free it before returning the error.