Bug 2536466 (CVE-2026-90106)

Summary: CVE-2026-90106 kernel: net: bridge: arp/nd proxy: fix reading neigh ha
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
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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Doc Text:
A flaw was found in the Linux kernel's bridge ARP/ND (Address Resolution Protocol/Neighbor Discovery) proxy. When the neighbor hardware address (HA) is read directly, it can result in torn or partial reads if the neighbor entry is simultaneously being updated. This data inconsistency could lead to incorrect network state or unexpected behavior within the bridge module.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-17 18:04:39 UTC
In the Linux kernel, the following vulnerability has been resolved:

net: bridge: arp/nd proxy: fix reading neigh ha

Currently neigh ha address is read directly, but that can result in
torn/partial reads if the neigh is being updated. Use neigh_ha_snapshot
to take a stable snapshot of the address.