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CVE-2025-37914 is a memory-corruption vulnerability in the Linux kernel Enhanced Transmission Selection (ETS) traffic-control queuing discipline. A NetEm child queuing discipline can reenter the ETS parent enqueue callback. In the affected path, ETS may insert the same class into its active list more than once because it checks queue length but does not verify that the class is already active. Duplicate list insertion corrupts kernel list state. The upstream fix adds an active-class check before insertion.
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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.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel ETS scheduler double-list-add flaw.
A Linux kernel network-scheduler flaw involving a double list addition in an ETS class when NetEm is configured as a child queueing discipline.
A Linux kernel net_sched/ETS flaw involving a double addition to a list when a class has a netem child qdisc.
A Linux kernel net_sched ETS flaw involving a double list addition when netem is configured as a child qdisc.
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.