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CVE-2026-98017

net/sched: defer qdisc freeing after failed creation PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 51ab2994c387c80b45caf8b8067b3f3b97771d25 before 96a27a3e64e7c87abade03fb2ad04ed66992a89a; affected 51ab2994c387c80b45caf8b8067b3f3b97771d25 before 6a1b49bb9fdf9e8e7aa38e8cd635c0cc4074447d; affected 51ab2994c387c80b45caf8b8067b3f3b97771d25 before 20bf6fa34b345333971bd4464a322cce87b83f4e; affected 51ab2994c387c80b45caf8b8067b3f3b97771d25 before 156a3bab69744e9225bb9eff8c5cc53da18d5a2e; affected 51ab2994c387c80b45caf8b8067b3f3b97771d25 before 5bfe927c5b4b290fad529186218c728589b4b101; affected 51ab2994c387c80b45caf8b8067b3f3b97771d25 before e6662f2100f8d33b0f4d0047c219efd6bba186ea
Linux / Linuxaffected 4.16; unaffected 0 before 4.16; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References