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CVE-2023-52522 is a concurrency flaw in the Linux kernel networking neighbor subsystem's neigh_periodic_work() worker. When deleting an RCU-protected neighbor-table item, the writer did not use rcu_assign_pointer() or WRITE_ONCE() while concurrent readers dereferenced the pointer through rcu_dereference(). The unprotected pointer update could be torn, allowing a concurrent reader to observe an inconsistent pointer value. The upstream correction uses rcu_assign_pointer(), providing both an atomic publication primitive appropriate for RCU readers and lockdep coverage.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
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.
Linux kernel networking store-tearing race vulnerability.
Linux kernel neighbor-cache periodic-work store-tearing vulnerability.
Linux kernel networking race/data-consistency flaw in neighbor periodic work.
Linux kernel neighbor-table store-tearing issue.
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.