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CVE-2021-47432 is an integer-overflow vulnerability in the Linux kernel generic radix-tree implementation. The overflow occurs in the peek() operation in lib/generic-radix-tree.c when processing corner cases exposed by inode numbers distributed across much of the 64-bit inode-number space. The resulting invalid arithmetic can cause a kernel oops.
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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.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel generic radix-tree integer-overflow flaw.
An overflow flaw in the Linux kernel generic radix tree peek operation.
A low-severity Linux kernel integer-overflow vulnerability in generic radix-tree peek handling. Under the stated CVSS vector, a local attacker with low privileges can cause a high availability impact (denial of service).
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.