CVE-2026-23105
High
Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag This is more of a preventive patch to make the code more consistent and to prevent possible exploits that employ child qlen manipulations on qfq. use cl_is_active instead of relying on the child qdisc's qlen to determine class activation.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedFeb 4, 2026
First seenFeb 4, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- linux linux_kernel5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.8 ≤ v < 5.10.249, 5.11 ≤ v < 5.15.199, 5.16 ≤ v < 6.1.162, 6.2 ≤ v < 6.6.122, 6.7 ≤ v < 6.12.68, 6.13 ≤ v < 6.18.8, 6.19 | 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8 |
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