CVE-2025-38177: sch_hfsc: make hfsc_qlen_notify() idempotent

Published Jul 4, 2025
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

schhfsc: make hfscqlennotify() idempotent

hfscqlennotify() is not idempotent either and not friendly to its callers, like fqcodeldequeue(). Let's make it idempotent to ease qdisctreereducebacklog() callers' life:

1. updatevf() decreases cl->clnactive, so we can check whether it is non-zero before calling it.

2. eltreeremove() always removes RB node cl->elnode, but we can use RBEMPTYNODE() + RBCLEARNODE() to make it safe.

Affected Software

219 affected componentsFixes available
Linux Foundation Linux Kernel
Microsoft cbl2 kernel 5.15.186.1-1
Microsoft cbl2 kernel 5.15.186.1-1
Patch available
Linux Linux kernel<5.4.297
Linux Linux kernel>=5.5<5.10.241
Linux Linux kernel>=5.11<5.15.190
Linux Linux kernel>=5.16<6.1.138
Linux Linux kernel>=6.2<6.6.90
Linux Linux kernel>=6.7<6.12.28
Linux Linux kernel>=6.13<6.14.6
Linux Linux kernel=6.15-rc1
Debian Debian Linux=11.0
ubuntu/linux-azure<4.15.0-1190.205~14.04.1
4.15.0-1190.205~14.04.1
ubuntu/linux-aws-hwe<4.15.0-1182.195~16.04.1
4.15.0-1182.195~16.04.1
ubuntu/linux-azure<4.15.0-1190.205~16.04.1
4.15.0-1190.205~16.04.1
ubuntu/linux-gcp<4.15.0-1175.192~16.04.1
4.15.0-1175.192~16.04.1
ubuntu/linux-hwe<4.15.0-239.251~16.04.1
4.15.0-239.251~16.04.1
ubuntu/linux-oracle<4.15.0-1144.155~16.04.1
4.15.0-1144.155~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux<4.15.0-239.251
4.15.0-239.251
ubuntu/linux-aws<4.15.0-1182.195
4.15.0-1182.195
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-aws-5.4<5.4.0-1148.158~18.04.1
5.4.0-1148.158~18.04.1
ubuntu/linux-azure*
ubuntu/linux-azure-4.15<4.15.0-1190.205
4.15.0-1190.205
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-5.4<5.4.0-1153.160~18.04.1
5.4.0-1153.160~18.04.1
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-4.15<4.15.0-1175.192
4.15.0-1175.192
ubuntu/linux-gcp-5.3*
ubuntu/linux-gcp-5.4<5.4.0-1151.160~18.04.1
5.4.0-1151.160~18.04.1
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-5.4<5.4.0-219.239~18.04.1
5.4.0-219.239~18.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-ibm-5.4<5.4.0-1094.99~18.04.1
5.4.0-1094.99~18.04.1
ubuntu/linux-kvm<4.15.0-1165.170
4.15.0-1165.170
ubuntu/linux-oem*
ubuntu/linux-oracle<4.15.0-1144.155
4.15.0-1144.155
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-oracle-5.4<5.4.0-1146.156~18.04.1
5.4.0-1146.156~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1131.144~18.04.1
5.4.0-1131.144~18.04.1
ubuntu/linux-aws-fips<4.15.0-2120.126
4.15.0-2120.126
ubuntu/linux-azure-fips<4.15.0-2099.105
4.15.0-2099.105
ubuntu/linux-fips<4.15.0-1137.148
4.15.0-1137.148
ubuntu/linux-gcp-fips<4.15.0-2083.89
4.15.0-2083.89
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-219.239
5.4.0-219.239
ubuntu/linux-aws<5.4.0-1148.158
5.4.0-1148.158
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.15<5.15.0-1087.94~20.04.1
5.15.0-1087.94~20.04.1
ubuntu/linux-aws-5.8*
ubuntu/linux-azure<5.4.0-1153.160
5.4.0-1153.160
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.13*
ubuntu/linux-azure-5.15<5.15.0-1094.103~20.04.1
5.15.0-1094.103~20.04.1
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde*
ubuntu/linux-bluefield<5.4.0-1107.114
5.4.0-1107.114
ubuntu/linux-gcp<5.4.0-1151.160
5.4.0-1151.160
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.13*
ubuntu/linux-gcp-5.15<5.15.0-1086.95~20.04.1
5.15.0-1086.95~20.04.1
ubuntu/linux-gcp-5.8*
ubuntu/linux-gke*
ubuntu/linux-gke-5.15*
ubuntu/linux-gkeop*
ubuntu/linux-gkeop-5.15*
ubuntu/linux-hwe-5.11*
ubuntu/linux-hwe-5.13*
ubuntu/linux-hwe-5.15<5.15.0-143.153~20.04.1
5.15.0-143.153~20.04.1
ubuntu/linux-hwe-5.8*
ubuntu/linux-ibm<5.4.0-1094.99
5.4.0-1094.99
ubuntu/linux-ibm-5.15<5.15.0-1079.82~20.04.1
5.15.0-1079.82~20.04.1
ubuntu/linux-intel-5.13*
ubuntu/linux-intel-iotg-5.15<5.15.0-1083.89~20.04.1
5.15.0-1083.89~20.04.1
ubuntu/linux-iot<5.4.0-1052.55
5.4.0-1052.55
ubuntu/linux-kvm<5.4.0-1135.144
5.4.0-1135.144
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-143.153~20.04.1
5.15.0-143.153~20.04.1
ubuntu/linux-nvidia-tegra-5.15<5.15.0-1040.40~20.04.1
5.15.0-1040.40~20.04.1
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle<5.4.0-1146.156
5.4.0-1146.156
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.13*
ubuntu/linux-oracle-5.15<5.15.0-1084.90~20.04.1
5.15.0-1084.90~20.04.1
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi<5.4.0-1131.144
5.4.0-1131.144
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.15<5.15.0-1082.86~20.04.1
5.15.0-1082.86~20.04.1
ubuntu/linux-riscv-5.8*
ubuntu/linux-xilinx-zynqmp<5.4.0-1066.70
5.4.0-1066.70
ubuntu/linux-aws-fips<5.4.0-1148.158+fips1
5.4.0-1148.158+fips1
ubuntu/linux-azure-fips<5.4.0-1154.161+fips1
5.4.0-1154.161+fips1
ubuntu/linux-fips<5.4.0-1122.132
5.4.0-1122.132
ubuntu/linux-gcp-fips<5.4.0-1151.160+fips1
5.4.0-1151.160+fips1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.15.0-143.153
5.15.0-143.153
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1087.94
5.15.0-1087.94
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-aws-6.8<6.8.0-1031.33~22.04.1
6.8.0-1031.33~22.04.1
ubuntu/linux-azure<5.15.0-1092.101
5.15.0-1092.101
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-6.8<6.8.0-1031.36~22.04.1
6.8.0-1031.36~22.04.1
ubuntu/linux-azure-fde<5.15.0-1092.101.1
5.15.0-1092.101.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1086.95
5.15.0-1086.95
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gcp-6.8<6.8.0-1032.34~22.04.1
6.8.0-1032.34~22.04.1
ubuntu/linux-gke<5.15.0-1084.90
5.15.0-1084.90
ubuntu/linux-gkeop<5.15.0-1069.77
5.15.0-1069.77
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-hwe-6.8<6.8.0-64.67~22.04.1
6.8.0-64.67~22.04.1
ubuntu/linux-ibm<5.15.0-1079.82
5.15.0-1079.82
ubuntu/linux-ibm-6.8<6.8.0-1028.28~22.04.1
6.8.0-1028.28~22.04.1
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-intel-iotg<5.15.0-1082.88
5.15.0-1082.88
ubuntu/linux-kvm<5.15.0-1083.88
5.15.0-1083.88
ubuntu/linux-lowlatency<5.15.0-143.153
5.15.0-143.153
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-lowlatency-hwe-6.8<6.8.0-63.66.1~22.04.1
6.8.0-63.66.1~22.04.1
ubuntu/linux-nvidia<5.15.0-1081.82
5.15.0-1081.82
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
ubuntu/linux-nvidia-6.8<6.8.0-1030.33~22.04.1
6.8.0-1030.33~22.04.1
ubuntu/linux-nvidia-tegra<5.15.0-1040.40
5.15.0-1040.40
ubuntu/linux-nvidia-tegra-igx<5.15.0-1029.29
5.15.0-1029.29
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-oem-6.5*
ubuntu/linux-oracle<5.15.0-1084.90
5.15.0-1084.90
ubuntu/linux-oracle-6.5*
ubuntu/linux-oracle-6.8<6.8.0-1028.29~22.04.1
6.8.0-1028.29~22.04.1
ubuntu/linux-raspi<5.15.0-1083.86
5.15.0-1083.86
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-riscv-6.5*
ubuntu/linux-riscv-6.8<6.8.0-63.66~22.04.1
6.8.0-63.66~22.04.1
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-xilinx-zynqmp<5.15.0-1051.55
5.15.0-1051.55
ubuntu/linux-bluefield<5.15.0-1070.72
5.15.0-1070.72
ubuntu/linux-intel-iot-realtime<5.15.0-1080.82
5.15.0-1080.82
ubuntu/linux-realtime<5.15.0-1087.96
5.15.0-1087.96
ubuntu/linux-realtime-6.8<6.8.1-1024.25~22.04.1
6.8.1-1024.25~22.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-aws-fips<5.15.0-1087.94+fips1
5.15.0-1087.94+fips1
ubuntu/linux-azure-fips<5.15.0-1094.103+fips1
5.15.0-1094.103+fips1
ubuntu/linux-fips<5.15.0-143.153+fips1
5.15.0-143.153+fips1
ubuntu/linux-gcp-fips<5.15.0-1086.95+fips1
5.15.0-1086.95+fips1
ubuntu/linux<6.8.0-63.66
6.8.0-63.66
ubuntu/linux-aws<6.8.0-1031.33
6.8.0-1031.33
ubuntu/linux-aws-6.14<6.14.0-1009.9~24.04.1
6.14.0-1009.9~24.04.1
ubuntu/linux-azure<6.8.0-1031.36
6.8.0-1031.36
ubuntu/linux-azure-6.11*
ubuntu/linux-azure-nvidia<6.8.0-1019.20
6.8.0-1019.20
ubuntu/linux-gcp<6.8.0-1032.34
6.8.0-1032.34
ubuntu/linux-gcp-6.11*
ubuntu/linux-gcp-6.14<6.14.0-1011.11~24.04.1
6.14.0-1011.11~24.04.1
ubuntu/linux-gke<6.8.0-1027.31
6.8.0-1027.31
ubuntu/linux-gkeop<6.8.0-1014.16
6.8.0-1014.16
ubuntu/linux-hwe-6.11*
ubuntu/linux-ibm<6.8.0-1028.28
6.8.0-1028.28
ubuntu/linux-lowlatency<6.8.0-63.66.1
6.8.0-63.66.1
ubuntu/linux-lowlatency-hwe-6.11*
ubuntu/linux-nvidia<6.8.0-1030.33
6.8.0-1030.33
ubuntu/linux-nvidia-6.11<6.11.0-1012.12
6.11.0-1012.12
ubuntu/linux-nvidia-lowlatency<6.8.0-1030.33.1
6.8.0-1030.33.1
ubuntu/linux-nvidia-tegra<6.8.0-1008.8
6.8.0-1008.8
ubuntu/linux-oem-6.11<6.11.0-1025.25
6.11.0-1025.25
ubuntu/linux-oem-6.14<6.14.0-1006.6
6.14.0-1006.6
ubuntu/linux-oem-6.8<6.8.0-1030.30
6.8.0-1030.30
ubuntu/linux-oracle<6.8.0-1028.29
6.8.0-1028.29
ubuntu/linux-oracle-6.14<6.14.0-1009.9~24.04.1
6.14.0-1009.9~24.04.1
ubuntu/linux-raspi<6.8.0-1030.34
6.8.0-1030.34
ubuntu/linux-raspi-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-6.14<6.14.0-23.23.1~24.04.1
6.14.0-23.23.1~24.04.1
ubuntu/linux-xilinx<6.8.0-1017.18
6.8.0-1017.18
ubuntu/linux-raspi-realtime<6.8.0-2025.26
6.8.0-2025.26
ubuntu/linux-realtime<6.8.1-1024.25
6.8.1-1024.25
ubuntu/linux-realtime-6.14<6.14.0-1010.10~24.04.1
6.14.0-1010.10~24.04.1
ubuntu/linux-fips<6.8.0-78.78+fips1
6.8.0-78.78+fips1
ubuntu/linux-azure-fde*
ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1190.205~14.04.1
  2. Upgrade

    Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-1182.195~16.04.1
  3. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 4.15.0-1190.205~16.04.1
  4. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 4.15.0-1175.192~16.04.1
  5. Upgrade

    Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.

    Fixed in 4.15.0-239.251~16.04.1
  6. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1144.155~16.04.1
  7. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 4.15.0-239.251
  8. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 4.15.0-1182.195
  9. Upgrade

    Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1148.158~18.04.1
  10. Upgrade

    Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1190.205
  11. Upgrade

    Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1153.160~18.04.1
  12. Upgrade

    Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1175.192
  13. Upgrade

    Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1151.160~18.04.1
  14. Upgrade

    Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-219.239~18.04.1
  15. Upgrade

    Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1094.99~18.04.1
  16. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 4.15.0-1165.170
  17. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 4.15.0-1144.155
  18. Upgrade

    Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1146.156~18.04.1
  19. Upgrade

    Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1131.144~18.04.1
  20. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2120.126
  21. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2099.105
  22. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-1137.148
  23. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 4.15.0-2083.89
  24. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 5.4.0-219.239
  25. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0-1148.158
  26. Upgrade

    Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1087.94~20.04.1
  27. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0-1153.160
  28. Upgrade

    Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1094.103~20.04.1
  29. Upgrade

    Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.

    Fixed in 5.4.0-1107.114
  30. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1151.160
  31. Upgrade

    Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1086.95~20.04.1
  32. Upgrade

    Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-143.153~20.04.1
  33. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1094.99
  34. Upgrade

    Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1079.82~20.04.1
  35. Upgrade

    Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1083.89~20.04.1
  36. Upgrade

    Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.

    Fixed in 5.4.0-1052.55
  37. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1135.144
  38. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-143.153~20.04.1
  39. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1040.40~20.04.1
  40. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0-1146.156
  41. Upgrade

    Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1084.90~20.04.1
  42. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1131.144
  43. Upgrade

    Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1082.86~20.04.1
  44. Upgrade

    Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1066.70
  45. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1148.158+fips1
  46. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1154.161+fips1
  47. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1122.132
  48. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1151.160+fips1
  49. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 5.15.0-143.153
  50. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 5.15.0-1087.94
  51. Upgrade

    Upgrade ubuntu/linux-aws-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1031.33~22.04.1
  52. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 5.15.0-1092.101
  53. Upgrade

    Upgrade ubuntu/linux-azure-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1031.36~22.04.1
  54. Upgrade

    Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.

    Fixed in 5.15.0-1092.101.1
  55. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 5.15.0-1086.95
  56. Upgrade

    Upgrade ubuntu/linux-gcp-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1032.34~22.04.1
  57. Upgrade

    Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.

    Fixed in 5.15.0-1084.90
  58. Upgrade

    Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.

    Fixed in 5.15.0-1069.77
  59. Upgrade

    Upgrade ubuntu/linux-hwe-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-64.67~22.04.1
  60. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 5.15.0-1079.82
  61. Upgrade

    Upgrade ubuntu/linux-ibm-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1028.28~22.04.1
  62. Upgrade

    Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.

    Fixed in 5.15.0-1082.88
  63. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 5.15.0-1083.88
  64. Upgrade

    Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.15.0-143.153
  65. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-63.66.1~22.04.1
  66. Upgrade

    Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.

    Fixed in 5.15.0-1081.82
  67. Upgrade

    Upgrade ubuntu/linux-nvidia-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1030.33~22.04.1
  68. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.

    Fixed in 5.15.0-1040.40
  69. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra-igx to a version that resolves this vulnerability.

    Fixed in 5.15.0-1029.29
  70. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 5.15.0-1084.90
  71. Upgrade

    Upgrade ubuntu/linux-oracle-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1028.29~22.04.1
  72. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 5.15.0-1083.86
  73. Upgrade

    Upgrade ubuntu/linux-riscv-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-63.66~22.04.1
  74. Upgrade

    Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.

    Fixed in 5.15.0-1051.55
  75. Upgrade

    Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.

    Fixed in 5.15.0-1070.72
  76. Upgrade

    Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.

    Fixed in 5.15.0-1080.82
  77. Upgrade

    Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.

    Fixed in 5.15.0-1087.96
  78. Upgrade

    Upgrade ubuntu/linux-realtime-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.1-1024.25~22.04.1
  79. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-1087.94+fips1
  80. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-1094.103+fips1
  81. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-143.153+fips1
  82. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-1086.95+fips1
  83. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 6.8.0-63.66
  84. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 6.8.0-1031.33
  85. Upgrade

    Upgrade ubuntu/linux-aws-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1009.9~24.04.1
  86. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 6.8.0-1031.36
  87. Upgrade

    Upgrade ubuntu/linux-azure-nvidia to a version that resolves this vulnerability.

    Fixed in 6.8.0-1019.20
  88. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 6.8.0-1032.34
  89. Upgrade

    Upgrade ubuntu/linux-gcp-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1011.11~24.04.1
  90. Upgrade

    Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.

    Fixed in 6.8.0-1027.31
  91. Upgrade

    Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.

    Fixed in 6.8.0-1014.16
  92. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 6.8.0-1028.28
  93. Upgrade

    Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.

    Fixed in 6.8.0-63.66.1
  94. Upgrade

    Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.

    Fixed in 6.8.0-1030.33
  95. Upgrade

    Upgrade ubuntu/linux-nvidia-6.11 to a version that resolves this vulnerability.

    Fixed in 6.11.0-1012.12
  96. Upgrade

    Upgrade ubuntu/linux-nvidia-lowlatency to a version that resolves this vulnerability.

    Fixed in 6.8.0-1030.33.1
  97. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.

    Fixed in 6.8.0-1008.8
  98. Upgrade

    Upgrade ubuntu/linux-oem-6.11 to a version that resolves this vulnerability.

    Fixed in 6.11.0-1025.25
  99. Upgrade

    Upgrade ubuntu/linux-oem-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1006.6
  100. Upgrade

    Upgrade ubuntu/linux-oem-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1030.30
  101. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 6.8.0-1028.29
  102. Upgrade

    Upgrade ubuntu/linux-oracle-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1009.9~24.04.1
  103. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 6.8.0-1030.34
  104. Upgrade

    Upgrade ubuntu/linux-riscv-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-23.23.1~24.04.1
  105. Upgrade

    Upgrade ubuntu/linux-xilinx to a version that resolves this vulnerability.

    Fixed in 6.8.0-1017.18
  106. Upgrade

    Upgrade ubuntu/linux-raspi-realtime to a version that resolves this vulnerability.

    Fixed in 6.8.0-2025.26
  107. Upgrade

    Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.

    Fixed in 6.8.1-1024.25
  108. Upgrade

    Upgrade ubuntu/linux-realtime-6.14 to a version that resolves this vulnerability.

    Fixed in 6.14.0-1010.10~24.04.1
  109. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 6.8.0-78.78+fips1

Event History

Jul 4, 2025
CVE Published
via MITRE·12:47 PM
Data Sourced
via MITRE·12:47 PM
DescriptionSeverity
Data Sourced
via Red Hat·01:01 PM
DescriptionSeverityAffected Software
Data Sourced
via OSV·01:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·01:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Dec 20, 2025
Data Sourced
via Microsoft·01:01 AM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2025-38177?

CVE-2025-38177 has a moderate severity rating due to its impact on the Linux kernel's queuing discipline.

2

What does CVE-2025-38177 affect?

CVE-2025-38177 affects the Linux Kernel's hfsc_qlen_notify() function and its interaction with other queuing mechanisms.

3

How do I fix CVE-2025-38177?

To fix CVE-2025-38177, update your Linux Kernel to the latest version where the vulnerability has been resolved.

4

What is hfsc_qlen_notify() in relation to CVE-2025-38177?

hfsc_qlen_notify() is a function in the Linux kernel that needed to be made idempotent to improve its compatibility with other queue management functions.

5

Why is CVE-2025-38177 a concern for Linux users?

CVE-2025-38177 is a concern for Linux users as it can potentially lead to inefficiencies in packet queuing and network performance.

Company

Resources

Contact

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