CVE-2026-22999
BaseFortify
Publication date: 2026-01-25
Last updated on: 2026-04-27
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | From 6.13 (inc) to 6.18.7 (exc) |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | 6.19 |
| linux | linux_kernel | From 3.8 (inc) to 5.10.249 (exc) |
| linux | linux_kernel | From 5.11 (inc) to 5.15.199 (exc) |
| linux | linux_kernel | From 5.16 (inc) to 6.1.162 (exc) |
| linux | linux_kernel | From 6.2 (inc) to 6.6.122 (exc) |
| linux | linux_kernel | From 6.7 (inc) to 6.12.67 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is in the Linux kernel's network scheduler component, specifically in the sch_qfq module. The issue occurs in the function qfq_change_class(), where existing classes and queueing disciplines (qdiscs) might be freed incorrectly. The fix ensures that these are only freed if a new class and qdisc were allocated, preventing use-after-free (UAF) errors.
How can this vulnerability impact me? :
If exploited, this vulnerability could lead to use-after-free errors in the Linux kernel's network scheduler, potentially causing system instability, crashes, or allowing an attacker to execute arbitrary code with kernel privileges.