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CVE-2024-41055 is a race-condition flaw in the Linux kernel memory-management sparse-memory code. In pfn_section_valid(), a concurrent section_deactivate() operation can clear memory_section->usage after it is read. A prior change added READ_ONCE() for this access, but did not validate the returned pointer before dereferencing it. Consequently, pfn_section_valid() can dereference a NULL usage pointer. The upstream correction validates the pointer before use.
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No public exploit code observed for this vulnerability.
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8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel memory-management vulnerability involving NULL pointer dereference in pfn_section_valid().
A NULL-pointer dereference vulnerability in the Linux kernel memory-management pfn_section_valid() function.
Potential NULL-pointer dereference in the Linux kernel memory-management pfn_section_valid() function.
Linux kernel memory-management flaw involving a possible NULL-pointer dereference in pfn_section_valid().
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.