net/sched: sch_qfq: do not free existing class in qfq_change_class()
Summary
| CVE | CVE-2026-22999 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-01-25 15:15:54 UTC |
| Updated | 2026-04-27 14:16:28 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Problem Types: NVD-CWE-noinfo
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 462dbc9101acd38e92eda93c0726857517a24bbd 2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e git | Not specified |
| CNA | Linux | Linux | affected 462dbc9101acd38e92eda93c0726857517a24bbd cff6cd703f41d8071995956142729e4bba160363 git | Not specified |
| CNA | Linux | Linux | affected 462dbc9101acd38e92eda93c0726857517a24bbd f06f7635499bc806cbe2bbc8805c7cef8b1edddf git | Not specified |
| CNA | Linux | Linux | affected 462dbc9101acd38e92eda93c0726857517a24bbd 0a234660dc70ce45d771cbc76b20d925b73ec160 git | Not specified |
| CNA | Linux | Linux | affected 462dbc9101acd38e92eda93c0726857517a24bbd 362e269bb03f7076ba9990e518aeddb898232e50 git | Not specified |
| CNA | Linux | Linux | affected 462dbc9101acd38e92eda93c0726857517a24bbd e9d8f11652fa08c647bf7bba7dd8163241a332cd git | Not specified |
| CNA | Linux | Linux | affected 462dbc9101acd38e92eda93c0726857517a24bbd 3879cffd9d07aa0377c4b8835c4f64b4fb24ac78 git | Not specified |
| CNA | Linux | Linux | affected 3.8 | Not specified |
| CNA | Linux | Linux | unaffected 3.8 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.249 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.199 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.162 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.122 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.67 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.7 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/3879cffd9d07aa0377c4b8835c4f64b4fb24ac78 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/cff6cd703f41d8071995956142729e4bba160363 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/0a234660dc70ce45d771cbc76b20d925b73ec160 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/e9d8f11652fa08c647bf7bba7dd8163241a332cd | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/f06f7635499bc806cbe2bbc8805c7cef8b1edddf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/362e269bb03f7076ba9990e518aeddb898232e50 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.