PT-2026-4661 · Linux+2 · Linux Kernel+2
Published
2026-01-01
·
Updated
2026-05-22
·
CVE-2026-22999
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A flaw exists in the Linux kernel’s networking scheduler, specifically within the sch qfq (Stochastic Fairness Queueing) component. The
qfq change class() function contains an error that can lead to a use-after-free condition. This occurs when the function attempts to free memory that is still in use, potentially resulting in system instability or compromise. The issue arises because the cl->qdisc and cl structures are freed under incorrect circumstances, specifically when a new class and queueing discipline have not been allocated.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Allocation of Resources Without Limits
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu