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CVE-2025-38472 is a race condition in the Linux kernel Netfilter connection-tracking subsystem. A conntrack entry returned to the RCU slab can be reinitialized for a new flow while another CPU still observes the prior incarnation. During confirmation, the new entry can receive the IPS_CONFIRMED state before hash-table insertion. If insertion is subsequently skipped, such as during chain-length or clash-resolution handling, its list-link fields remain uninitialized/overloaded rather than representing a valid hash-list membership. A competing garbage-collection path can identify the entry as expired and confirmed, then attempt deletion through __nf_ct_delete_from_lists, dereferencing the invalid list linkage and crashing the kernel. The fix defers IPS_CONFIRMED assignment until after hash insertion, applies atomic-state ordering protections, and checks confirmation status before further garbage-collection processing.
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No public exploit code observed for this vulnerability.
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21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel Netfilter nf_conntrack flaw that can cause a crash when an uninitialized entry is removed.
A Linux kernel netfilter nf_conntrack vulnerability that can cause a crash when an uninitialized entry is removed.
A Linux kernel netfilter nf_conntrack flaw that can cause a crash when an uninitialized entry is removed.
A Linux kernel netfilter/nf_conntrack flaw that can cause a crash due to removal of an uninitialized entry.
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.