Vulnerability details
CVE-2026-98017
Linux Linux
net/sched: defer qdisc freeing after failed creation
CVSS 3.1
7.8High
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 4.16 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 51ab2994c387c80b45caf8b8067b3f3b97771d25 ≤ v < 6a1b49bb9fdf9e8e7aa38e8cd635c0cc4074447d | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 51ab2994c387c80b45caf8b8067b3f3b97771d25 ≤ v < 20bf6fa34b345333971bd4464a322cce87b83f4e | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 51ab2994c387c80b45caf8b8067b3f3b97771d25 ≤ v < 96a27a3e64e7c87abade03fb2ad04ed66992a89a | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 51ab2994c387c80b45caf8b8067b3f3b97771d25 ≤ v < 5bfe927c5b4b290fad529186218c728589b4b101 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 51ab2994c387c80b45caf8b8067b3f3b97771d25 ≤ v < e6662f2100f8d33b0f4d0047c219efd6bba186ea | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 51ab2994c387c80b45caf8b8067b3f3b97771d25 ≤ v < 156a3bab69744e9225bb9eff8c5cc53da18d5a2e | CVEProject cvelistV5 (CNA) |
References and advisories
6- https://git.kernel.org/stable/c/96a27a3e64e7c87abade03fb2ad04ed66992a89a
- https://git.kernel.org/stable/c/6a1b49bb9fdf9e8e7aa38e8cd635c0cc4074447d
- https://git.kernel.org/stable/c/20bf6fa34b345333971bd4464a322cce87b83f4e
- https://git.kernel.org/stable/c/156a3bab69744e9225bb9eff8c5cc53da18d5a2e
- https://git.kernel.org/stable/c/5bfe927c5b4b290fad529186218c728589b4b101
- https://git.kernel.org/stable/c/e6662f2100f8d33b0f4d0047c219efd6bba186ea
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Details
- Published
- 2026-09-25
- Last updated
- 2026-10-19
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.12%
Probability of exploitation in 30 days
2.5%
Percentile (among all CVEs)
Weaknesses (CWE)
- —