CVE-2026-99282: Linux kernel use-after-free in TEQL qdisc packet transmit

CVE-2026-99282 · Severity: info · Published 2026-11-07

The Linux kernel's TEQL (trivial equalizer) network queue scheduler contains a use-after-free vulnerability when transmitting packets through a VLAN interface that drops traffic. An attacker with the ability to cause packet drops could potentially read or corrupt kernel memory. This vulnerability requires specific network configuration and packet conditions to trigger.

Technologies: Linux Kernel. Vendors: Linux.

Quick answers

Is CVE-2026-99282 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-99282 being exploited in the wild.
How severe is CVE-2026-99282?
Informational severity, published 7 November 2026.
Which products and versions are affected?
Linux Kernel versions prior to the fix.
Is there a fix for CVE-2026-99282?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-99282 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2026-99282?
Check whether you run Linux Kernel at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability exists in teql_master_xmit() in the Linux kernel's net/sched/sch_teql module. When a VLAN slave device returns NET_XMIT_DROP from dev_queue_xmit() after the skb has been freed, the function incorrectly treats the packet as unconsumed and attempts to manipulate the freed skb. The fix applies dev_xmit_complete() to properly distinguish between consumed packets (which should not be accessed again) and packets that failed to transmit.

Affected products

  • Linux Linux kernel versions prior to the fix

Timeline

  • 2026-11-07: disclosed

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