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CVE-2025-38350 is a use-after-free vulnerability in the Linux kernel traffic-control scheduler. Certain classful queueing disciplines can invoke a class dequeue handler while processing an enqueue operation. This can unexpectedly empty a child queueing discipline, cause queue-length notification logic to mark an in-flight class passive, and leave an ancestor scheduler holding a stale class pointer. Subsequent reactivation of the class can dereference freed memory. The corrective change ensures that backlog-reduction handling notifies the parent whenever a child queueing discipline becomes empty; repeated notifications are safe because the relevant classful scheduler notification handlers are idempotent.
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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.
46 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel net/sched issue involving notification handling when a child traffic-control class becomes empty.
A Linux kernel net/sched issue involving failure to consistently pass notifications when a child traffic-control class becomes empty.
A Linux kernel net/sched issue fixed through the Red Hat kernel-rt security update.
A Linux kernel network scheduler flaw involving failure to pass notifications when a child class becomes empty.
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.