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CVE-2022-1012 is an insufficient-randomness flaw in the Linux kernel TCP stack's Double-Hash TCP source-port selection algorithm. Its perturbation table was too small, allowing an attacker to use observed source-port selections to infer evolution of internal port-generation state. Because this state is shared across network interfaces and namespaces, the flaw can expose limited cross-interface or cross-namespace TCP traffic information. The issue enables system fingerprinting and inference of outbound TCP connection patterns; it is not a kernel memory-disclosure vulnerability.
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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.
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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.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel TCP source-port generation weakness in which a small table perturb size can result in an information leak.
Linux kernel information-leak vulnerability caused by a small table perturbation size in the TCP source-port generation algorithm.
A Linux kernel TCP source-port generation flaw in which a small table perturb size can cause an information leak.
Linux kernel information-leak vulnerability caused by a small table perturbation size in the TCP source-port generation algorithm.
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.