CVE-2026-98017
In the Linux kernel, the following vulnerability has been resolved: net/sched: defer qdisc freeing…
- Risk score
- 57/100
- CVSS
- 7.8 v3.1
- Exploit chance (30 days)
- 0.1%
- Published
- 25 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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, est…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.8 high
- On your watchlist: linux kernel
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
Original 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.
Last activity 25 Sep 2026. Patch Forecast updates every hour.