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CVE-2026-53266 affects the Linux kernel netfilter bridge ebtables SNAT target's optional ARP sender hardware-address rewrite. The target calls skb_store_bits() without first ensuring that the destination address range is writable. Although skb_header_pointer() safely reads the ARP header, it does not make the subsequent rewrite range writable. If that range resides in a nonlinear socket-buffer fragment backed by a splice-imported file page, the replacement MAC address is copied directly into the underlying page. The existing skb_ensure_writable(skb, 0) protection for Ethernet source-address rewriting does not protect this ARP payload range.
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No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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90 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability affecting kernel packages in CIQ CentOS Bridge 7.9, addressed by advisory ciqsa-2026_1586. No vulnerability-specific mechanism or severity is provided. Aggregate plugin indicators concerning exploit availability and known exploitation cannot be attributed specifically to this CVE.
A vulnerability covered by the Oracle Linux kernel security update published October 2, 2026. No vulnerability-specific mechanism, impact, exploitation status, or workaround is provided.
Listed in AlmaLinux kernel-package security advisory ALSA-2026-71233. Individual technical details and affected-package mappings are not provided.
A Linux kernel netfilter bridge vulnerability in the ebtables SNAT target allows an optional ARP sender hardware address rewrite to modify a backing file page without the necessary writability check. The reference assigns CVSS v3 severity of 8.8, reports available exploits, and lists a CISA Known Exploited Vulnerability remediation deadline of September 21, 2026.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.