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CVE-2024-39476 is a deadlock and busy-loop flaw in the Linux kernel MD RAID5 implementation. In the affected raid5d() processing path, md_check_recovery() requires reconfig_mutex to clear MD_SB_CHANGE_PENDING, while RAID5 I/O issuance waits for that flag to clear. If another context holds reconfig_mutex, raid5d() can repeatedly process I/O while being unable to clear the pending state itself. The fix skips I/O issuance when MD_SB_CHANGE_PENDING remains set after recovery checking and wakes the daemon after reconfig_mutex is released.
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No public exploit code observed for this vulnerability.
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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.
Linux kernel vulnerability covered by the security update.
Linux kernel md/RAID5 deadlock vulnerability involving raid5d waiting on itself while clearing MD_SB_CHANGE_PENDING.
Linux kernel md/RAID5 deadlock involving raid5d and MD_SB_CHANGE_PENDING.
Linux kernel md/raid5 self-wait deadlock flaw.
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.