Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: defer qdisc freeing after failed creation An RTM_NEWQDISC request can make clsact bind a populated shared ingress block during ->init(), publishing an embedded mini_Qdisc to lockless readers. If the same request has an invalid TCA_RATE, estimator setup fails after ->init(); the unwind removes the pointer but synchronously frees its containing qdisc while tc_run() may still hold it. Retire failed qdiscs through the same RCU helper as normal destruction. Inline the synchronous free into the callback now that no direct callers remain.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/156a3bab69744e9225bb9eff8c5cc53da18d5a2e
- https://git.kernel.org/stable/c/20bf6fa34b345333971bd4464a322cce87b83f4e
- https://git.kernel.org/stable/c/5bfe927c5b4b290fad529186218c728589b4b101
- https://git.kernel.org/stable/c/6a1b49bb9fdf9e8e7aa38e8cd635c0cc4074447d
- https://git.kernel.org/stable/c/96a27a3e64e7c87abade03fb2ad04ed66992a89a
- https://git.kernel.org/stable/c/e6662f2100f8d33b0f4d0047c219efd6bba186ea
FAQ
What is CVE-2026-98017?
CVE-2026-98017 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: net/sched: defer qdisc freeing after failed creation An RTM_NEWQDISC request can make clsact bind a populated shared ingress block...
How severe is CVE-2026-98017?
CVE-2026-98017 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-98017?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.