Answer in brief
CVE-2026-23105 records a High severity (CVSS 7.8) vulnerability in net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=462dbc9101acd38e92eda93c0726857517a24bbd <fac2c67bb2bb732eae4283e45fc338af7e08c254 || >=462dbc9101acd38e92eda93c0726857517a24bbd <b8c24cf5268fb3bfb8d16324c3dbb985f698c835 || >=462dbc9101acd38e92eda93c0726857517a24bbd <f27047abf7cac1b6f90c3ad60de21ef9f717c26d || >=462dbc9101acd38e92eda93c0726857517a24bbd <93b8635974fb050c43d07e35e5edfe6e685ca28a || >=462dbc9101acd38e92eda93c0726857517a24bbd <abd9fc26ea577561a5ef6241a1b058755ffdad0c || >=462dbc9101acd38e92eda93c0726857517a24bbd <77f1afd0bb4d5da95236f6114e6d0dfcde187ff6 || >=462dbc9101acd38e92eda93c0726857517a24bbd <d837fbee92453fbb829f950c8e7cf76207d73f33 | fac2c67bb2bb732eae4283e45fc338af7e08c254, b8c24cf5268fb3bfb8d16324c3dbb985f698c835, f27047abf7cac1b6f90c3ad60de21ef9f717c26d, 93b8635974fb050c43d07e35e5edfe6e685ca28a, abd9fc26ea577561a5ef6241a1b058755ffdad0c, 77f1afd0bb4d5da95236f6114e6d0dfcde187ff6, d837fbee92453fbb829f950c8e7cf76207d73f33 |
| Linux/Linuxgeneric | 3.8 | Not reported |
Published upstream
Feb 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.