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CVE-2023-52735 is an uncontrolled-recursion vulnerability in the Linux kernel BPF sockmap subsystem. The sock_map_close, sock_map_destroy, and sock_map_unhash protocol callbacks could erroneously invoke themselves, despite being designed not to recurse. Repeated self-invocation can exhaust kernel stack space. The upstream fix detects this recursive condition and exits the loop, intentionally favoring a resource leak over stack exhaustion.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel BPF sockmap flaw in which sock_map close, destroy, or unhash operations could recursively call themselves.
Linux kernel BPF sockmap flaw in which sock_map close, destroy, or unhash handling can recursively call itself.
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.