CVE-2025-21971
net_sched: Prevent creation of classes with TC_H_ROOT
02 Description
net_sched: Prevent creation of classes with TC_H_ROOT
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.
- EPSS probability
- 0.22% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 13.3% 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 2026-10-15.
- 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
- 2026-10-15 21:51Z13 DAYS 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
- Data version
- 5.2
- Document digest
- d91c38cc13b89c42da5c2ef2782c800fc5c937854cb09a3b598e962cc1b292f0
05 Affected products
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
07 Fixed in
Debian 12
- linux Fixed in 6.1.133-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 6.12.20-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 6.12.20-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux-hwe-edge No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-azure No fix yet
- linux-azure-5.3 No fix yet
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-5.3 No fix yet
- linux-gke-4.15 No fix yet
- linux-gke-5.4 No fix yet
- linux-gkeop-5.4 No fix yet
- linux-hwe No fix yet
- linux-hwe-edge No fix yet
- linux-oem No fix yet
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux Fixed in 5.4.0-216.236
- linux-aws Fixed in 5.4.0-1146.156
- linux-aws-5.11 No fix yet
- linux-aws-5.13 No fix yet
- linux-aws-5.15 Fixed in 5.15.0-1084.91~20.04.1
- linux-aws-5.8 No fix yet
- linux-azure Fixed in 5.4.0-1151.158
- linux-azure-5.11 No fix yet
- linux-azure-5.13 No fix yet
- linux-azure-5.15 Fixed in 5.15.0-1089.98~20.04.1
- linux-azure-5.8 No fix yet
- linux-azure-fde No fix yet
- linux-bluefield Fixed in 5.4.0-1105.112
- linux-gcp Fixed in 5.4.0-1149.158
- linux-gcp-5.11 No fix yet
- linux-gcp-5.13 No fix yet
- linux-gcp-5.15 Fixed in 5.15.0-1083.92~20.04.1
- linux-gcp-5.8 No fix yet
- linux-gke No fix yet
- linux-gke-5.15 No fix yet
- linux-gkeop No fix yet
- linux-gkeop-5.15 No fix yet
- linux-hwe-5.11 No fix yet
- linux-hwe-5.13 No fix yet
- linux-hwe-5.8 No fix yet
- linux-ibm Fixed in 5.4.0-1092.97
- linux-ibm-5.15 Fixed in 5.15.0-1076.79~20.04.1
- linux-intel-5.13 No fix yet
- linux-intel-iotg-5.15 Fixed in 5.15.0-1079.85~20.04.1
- linux-kvm Fixed in 5.4.0-1133.142
- linux-lowlatency-hwe-5.15 Fixed in 5.15.0-140.150~20.04.1
- linux-oem-5.10 No fix yet
- linux-oem-5.13 No fix yet
- linux-oem-5.14 No fix yet
- linux-oem-5.6 No fix yet
- linux-oracle Fixed in 5.4.0-1144.154
- linux-oracle-5.11 No fix yet
- linux-oracle-5.13 No fix yet
- linux-oracle-5.15 Fixed in 5.15.0-1081.87~20.04.1
- linux-oracle-5.8 No fix yet
7 further packages in Ubuntu 20.04 LTS not shown (first 40 listed).
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- linux Fixed in 5.15.0-140.150
- linux-allwinner-5.19 No fix yet
- linux-aws Fixed in 5.15.0-1084.91
- linux-aws-5.19 No fix yet
- linux-aws-6.2 No fix yet
- linux-aws-6.5 No fix yet
- linux-aws-6.8 Fixed in 6.8.0-1029.31~22.04.1
- linux-azure Fixed in 5.15.0-1089.98
- linux-azure-5.19 No fix yet
- linux-azure-6.2 No fix yet
- linux-azure-6.5 No fix yet
- linux-azure-6.8 Fixed in 6.8.0-1029.34~22.04.1
- linux-azure-fde Fixed in 5.15.0-1089.98.1
- linux-azure-fde-5.19 No fix yet
- linux-azure-fde-6.2 No fix yet
- linux-gcp Fixed in 5.15.0-1083.92
- linux-gcp-5.19 No fix yet
- linux-gcp-6.2 No fix yet
- linux-gcp-6.5 No fix yet
- linux-gcp-6.8 Fixed in 6.8.0-1030.32~22.04.1
- linux-gke Fixed in 5.15.0-1081.87
- linux-gkeop Fixed in 5.15.0-1066.74
- linux-hwe-5.19 No fix yet
- linux-hwe-6.2 No fix yet
- linux-hwe-6.5 No fix yet
- linux-hwe-6.8 Fixed in 6.8.0-60.63~22.04.1
- linux-ibm Fixed in 5.15.0-1076.79
- linux-ibm-6.8 Fixed in 6.8.0-1026.26~22.04.1
- linux-intel-iot-realtime No fix yet
- linux-intel-iotg Fixed in 5.15.0-1079.85
- linux-kvm Fixed in 5.15.0-1080.85
- linux-lowlatency Fixed in 5.15.0-140.150
- linux-lowlatency-hwe-5.19 No fix yet
- linux-lowlatency-hwe-6.2 No fix yet
- linux-lowlatency-hwe-6.5 No fix yet
- linux-lowlatency-hwe-6.8 Fixed in 6.8.0-60.63.1~22.04.1
- linux-nvidia Fixed in 5.15.0-1078.79
- linux-nvidia-6.2 No fix yet
- linux-nvidia-6.5 No fix yet
- linux-nvidia-6.8 Fixed in 6.8.0-1028.31~22.04.1
19 further packages in Ubuntu 22.04 LTS not shown (first 40 listed).
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- linux Fixed in 6.8.0-60.63
- linux-aws Fixed in 6.8.0-1029.31
- linux-azure Fixed in 6.8.0-1029.34
- linux-azure-6.11 Fixed in 6.11.0-1015.15~24.04.1
- linux-azure-nvidia Fixed in 6.8.0-1016.17
- linux-gcp Fixed in 6.8.0-1030.32
- linux-gcp-6.11 Fixed in 6.11.0-1015.15~24.04.1
- linux-gke Fixed in 6.8.0-1025.29
- linux-gkeop Fixed in 6.8.0-1012.14
- linux-hwe-6.11 Fixed in 6.11.0-26.26~24.04.1
- linux-ibm Fixed in 6.8.0-1026.26
- linux-lowlatency Fixed in 6.8.0-60.63.1
- linux-lowlatency-hwe-6.11 Fixed in 6.11.0-1014.15~24.04.1
- linux-nvidia Fixed in 6.8.0-1028.31
- linux-nvidia-6.11 Fixed in 6.11.0-1010.10
- linux-nvidia-lowlatency Fixed in 6.8.0-1028.31.1
- linux-nvidia-tegra Fixed in 6.8.0-1008.8
- linux-oem-6.11 Fixed in 6.11.0-1022.22
- linux-oem-6.8 Fixed in 6.8.0-1028.28
- linux-oracle Fixed in 6.8.0-1026.27
- linux-raspi Fixed in 6.8.0-1028.32
- linux-raspi-realtime No fix yet
- linux-realtime No fix yet
- linux-riscv Fixed in 6.8.0-60.63.1
- linux-xilinx Fixed in 6.8.0-1017.18
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Nvidia-BlueField 22.04 LTS
- linux-bluefield Fixed in 5.15.0-1066.68
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- linux No fix yet
- linux-aws Fixed in 4.4.0-1143.149Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1188.203~14.04.1Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
- linux-lts-xenial Fixed in 4.4.0-268.302~14.04.1Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- linux Fixed in 4.4.0-268.302Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-aws Fixed in 4.4.0-1181.196Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-aws-hwe Fixed in 4.15.0-1180.193~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure Fixed in 4.15.0-1188.203~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-gcp Fixed in 4.15.0-1173.190~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-hwe Fixed in 4.15.0-237.249~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-kvm Fixed in 4.4.0-1144.155Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-oracle Fixed in 4.15.0-1142.153~16.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- linux Fixed in 4.15.0-237.249Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-aws Fixed in 4.15.0-1180.193Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-aws-5.4 Fixed in 5.4.0-1146.156~18.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure-4.15 Fixed in 4.15.0-1188.203Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-azure-5.4 Fixed in 5.4.0-1151.158~18.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-gcp-4.15 Fixed in 4.15.0-1173.190Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-gcp-5.4 Fixed in 5.4.0-1149.158~18.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-hwe-5.4 Fixed in 5.4.0-216.236~18.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-ibm-5.4 Fixed in 5.4.0-1092.97~18.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-kvm Fixed in 4.15.0-1163.168Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-oracle Fixed in 4.15.0-1142.153Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-oracle-5.4 Fixed in 5.4.0-1144.154~18.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-raspi-5.4 Fixed in 5.4.0-1129.142~18.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- linux-hwe-5.15 Fixed in 5.15.0-142.152~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-iot Fixed in 5.4.0-1051.54Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- linux-nvidia-tegra-5.15 Fixed in 5.15.0-1039.39~20.04.1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-preview 22.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 16.04 LTS
- linux-fips Fixed in 4.4.0-1113.120Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 18.04 LTS
- linux-aws-fips Fixed in 4.15.0-2118.124Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 4.15.0-2097.103Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 4.15.0-1135.146Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 4.15.0-2081.87Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 20.04 LTS
- linux-aws-fips Fixed in 5.4.0-1146.156+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 5.4.0-1151.158+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 5.4.0-1120.130Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 5.4.0-1149.158+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 22.04 LTS
- linux-aws-fips Fixed in 5.15.0-1084.91+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 5.15.0-1089.98+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 5.15.0-140.150+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 5.15.0-1083.92+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 24.04 LTS
- linux-fips Fixed in 6.8.0-78.78+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS 16.04 LTS
- linux-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS 18.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS 20.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro Realtime 22.04 LTS
- linux-intel-iot-realtime Fixed in 5.15.0-1077.79Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-realtime Fixed in 5.15.0-1084.93Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-realtime-6.8 Fixed in 6.8.1-1022.23~22.04.1Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro Realtime 24.04 LTS
- linux-raspi-realtime Fixed in 6.8.0-2023.24Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-realtime Fixed in 6.8.1-1022.23Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.