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CVE-2024-40912 is a deadlock in the Linux kernel mac80211 wireless subsystem's ieee80211_sta_ps_deliver_wakeup() function. The function acquires sta->ps_lock with spin_lock() while synchronizing with ieee80211_tx_h_unicast_ps_buf(), which can run in softirq context. Because spin_lock() does not disable bottom halves, a softirq can execute on the same CPU while the lock is held and attempt to acquire the same lock, causing a self-deadlock and RCU stall. The fix uses spin_lock_bh() and spin_unlock_bh() to prevent softirq execution on the CPU holding the lock.
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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.
3 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.
Deadlock in Linux kernel mac80211 station power-save wakeup handling.
Linux kernel mac80211 Wi-Fi power-save delivery 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.