01 Record

CVE-2025-21971

net_sched: Prevent creation of classes with TC_H_ROOT

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: Prevent creation of classes with TC_H_ROOT

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.22% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 12.6% 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 2026-07-30.
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

2025-04-01 15:47Z1 YR AGO

Last updated

2026-08-05 11:55Z1 MO AGO

Reserved

2024-12-29

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

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base
CWE-703Improper Check or Handling of Exceptional ConditionsPillar

Data version

5.2

Document digest

5efb6bb980158479944887742c6cc6f2e67423c6519d305cc1976286a089b70e

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux066a3b5b2346febf9a655b444567b7138e3bb939 to < e05d9938b1b0ac40b6054cc5fa0ccbd9afd5ed4c, 066a3b5b2346febf9a655b444567b7138e3bb939 to < 7a82fe67a9f4d7123d8e5ba8f0f0806c28695006, 066a3b5b2346febf9a655b444567b7138e3bb939 to < 003d92c91cdb5a64b25a9a74cb8543aac9a8bb48, 066a3b5b2346febf9a655b444567b7138e3bb939 to < e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7, 066a3b5b2346febf9a655b444567b7138e3bb939 to < 78533c4a29ac3aeddce4b481770beaaa4f3bfb67, 066a3b5b2346febf9a655b444567b7138e3bb939 to < 5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7, 066a3b5b2346febf9a655b444567b7138e3bb939 to < 94edfdfb9505ab608e86599d1d1e38c83816fc1c, 066a3b5b2346febf9a655b444567b7138e3bb939 to < 0c3057a5a04d07120b3d0ec9c79568fceb9c921e, 2.6.25—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/e05d9938b1b0ac40b6054cc5fa0ccbd9afd5ed4c
git.kernel.orghttps://git.kernel.org/stable/c/7a82fe67a9f4d7123d8e5ba8f0f0806c28695006
git.kernel.orghttps://git.kernel.org/stable/c/003d92c91cdb5a64b25a9a74cb8543aac9a8bb48
git.kernel.orghttps://git.kernel.org/stable/c/e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7
git.kernel.orghttps://git.kernel.org/stable/c/78533c4a29ac3aeddce4b481770beaaa4f3bfb67
git.kernel.orghttps://git.kernel.org/stable/c/5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7
git.kernel.orghttps://git.kernel.org/stable/c/94edfdfb9505ab608e86599d1d1e38c83816fc1c
git.kernel.orghttps://git.kernel.org/stable/c/0c3057a5a04d07120b3d0ec9c79568fceb9c921e
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00030.html

01 Record index

CVE-2025-21971

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2025-21971

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References