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CVE-2020-25211 is a local buffer-overflow vulnerability in the Linux kernel Netfilter conntrack-netlink subsystem, affecting kernels through 5.8.7. The flaw is in ctnetlink_parse_tuple_filter(), with related older parsing paths also implicated. Insufficient validation of an attacker-supplied layer-3 protocol number permits an invalid value to index or copy beyond a local buffer during conntrack tuple-filter parsing. The upstream correction restricts accepted layer-3 protocol values to IPv4 and IPv6 and rejects other values.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A local buffer-overflow vulnerability in the Linux kernel's netfilter conntrack-netlink tuple-filter parsing code, fixed in the Red Hat kernel update.
A local buffer-overflow vulnerability in the Linux kernel netfilter connection-tracking netlink tuple-filter parser.
A local buffer-overflow vulnerability in the Linux kernel's ctnetlink_parse_tuple_filter function.
A local buffer-overflow vulnerability in the Linux kernel ctnetlink_parse_tuple_filter function.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.