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CVE-2026-23074 is a use-after-free vulnerability in the Linux kernel net/sched subsystem caused by permitting the teql queueing discipline to be attached as a non-root child qdisc, contrary to its design constraints. When teql is used beneath QFQ, teql reports successful enqueue operations but updates its parent-visible queue length only during dequeue; its peek operation returns no packet. QFQ consequently does not invoke teql dequeue and observes a queue length of zero. A subsequent QFQ class configuration change can free aggregate-associated class pointers without correctly deactivating the class. When delayed traffic is later rescheduled, the kernel dereferences a dangling pointer. The correction restricts teql to use as a root qdisc.
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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.
32 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel use-after-free vulnerability in the teql queueing discipline that can lead to privilege escalation.
A Linux kernel use-after-free vulnerability in the teql queueing discipline that can lead to privilege escalation.
A Linux kernel use-after-free vulnerability in the teql queueing discipline that can lead to privilege escalation.
A Linux kernel use-after-free vulnerability in the teql queueing discipline that can lead to privilege escalation.
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.