01 Record

CVE-2026-22999

net/sched: sch_qfq: do not free existing class in qfq_change_class()

HighPUBLISHEDCNA: Linux

CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

net/sched: sch_qfq: do not free existing class in qfq_change_class()

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 10.7% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published: 2026-01-25 14:36Z7 MO AGO
Last updated: 2026-08-05 12:20Z1 MO AGO
Reserved: 2026-01-13
Assigning CNA: Linux
Record state: PUBLISHED
Severity: High (CVSS 7.8)
CNA CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses: No CWE assigned
Data version: 5.2
Document digest: 0e95943aca366d47bba1620c58b80a8d938b30693321fff6917e37c4dabdc2c9

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux462dbc9101acd38e92eda93c0726857517a24bbd to < 2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e, 462dbc9101acd38e92eda93c0726857517a24bbd to < cff6cd703f41d8071995956142729e4bba160363, 462dbc9101acd38e92eda93c0726857517a24bbd to < f06f7635499bc806cbe2bbc8805c7cef8b1edddf, 462dbc9101acd38e92eda93c0726857517a24bbd to < 0a234660dc70ce45d771cbc76b20d925b73ec160, 462dbc9101acd38e92eda93c0726857517a24bbd to < 362e269bb03f7076ba9990e518aeddb898232e50, 462dbc9101acd38e92eda93c0726857517a24bbd to < e9d8f11652fa08c647bf7bba7dd8163241a332cd, 462dbc9101acd38e92eda93c0726857517a24bbd to < 3879cffd9d07aa0377c4b8835c4f64b4fb24ac78, 3.8—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/2a64fb9b47afffeb5dbab5fd3a518e1436dcc90e
git.kernel.orghttps://git.kernel.org/stable/c/cff6cd703f41d8071995956142729e4bba160363
git.kernel.orghttps://git.kernel.org/stable/c/f06f7635499bc806cbe2bbc8805c7cef8b1edddf
git.kernel.orghttps://git.kernel.org/stable/c/0a234660dc70ce45d771cbc76b20d925b73ec160
git.kernel.orghttps://git.kernel.org/stable/c/362e269bb03f7076ba9990e518aeddb898232e50
git.kernel.orghttps://git.kernel.org/stable/c/e9d8f11652fa08c647bf7bba7dd8163241a332cd
git.kernel.orghttps://git.kernel.org/stable/c/3879cffd9d07aa0377c4b8835c4f64b4fb24ac78

01 Record index

CVE-2026-22999

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-22999

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References