CVE-2026-22999

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

25/01/2026

Last modified:

26/02/2026

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_qfq: do not free existing class in qfq_change_class() Fixes qfq_change_class() error case. cl->qdisc and cl should only be freed if a new class and qdisc were allocated, or we risk various UAF.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	3.8 (including)	5.10.249 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.199 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.162 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.122 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.67 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.18.7 (excluding)
cpe:2.3:o:linux:linux_kernel:6.19:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.19:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.19:rc3::::::
cpe:2.3:o:linux:linux_kernel:6.19:rc4::::::
cpe:2.3:o:linux:linux_kernel:6.19:rc5::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-22999

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools