CVE-2025-37797: net_sched: hfsc: Fix a UAF vulnerability in class handling

Published May 2, 2025
·
Updated

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

netsched: hfsc: Fix a UAF vulnerability in class handling

This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfscchangeclass() when working with certain child qdiscs like netem or codel.

The vulnerability works as follows: 1. hfscchangeclass() checks if a class has packets (q.qlen != 0) 2. It then calls qdiscpeeklen(), which for certain qdiscs (e.g., codel, netem) might drop packets and empty the queue 3. The code continues assuming the queue is still non-empty, adding the class to vttree 4. This breaks HFSC scheduler assumptions that only non-empty classes are in vttree 5. Later, when the class is destroyed, this can lead to a Use-After-Free

The fix adds a second queue length check after qdiscpeeklen() to verify the queue wasn't emptied.

Affected Software

223 affected componentsFixes available
Linux Linux kernel
Linux Linux kernel>=4.14.1<5.4.293
Linux Linux kernel>=5.5<5.10.237
Linux Linux kernel>=5.11<5.15.181
Linux Linux kernel>=5.16<6.1.136
Linux Linux kernel>=6.2<6.6.89
Linux Linux kernel>=6.7<6.12.26
Linux Linux kernel>=6.13<6.14.5
Linux Linux kernel=4.14
Linux Linux kernel=4.14-rc2
Linux Linux kernel=4.14-rc3
Linux Linux kernel=4.14-rc4
Linux Linux kernel=4.14-rc5
Linux Linux kernel=4.14-rc6
Linux Linux kernel=4.14-rc7
Linux Linux kernel=4.14-rc8
Linux Linux kernel=6.15-rc1
Linux Linux kernel=6.15-rc2
Linux Linux kernel=6.15-rc3
Debian Debian Linux=11.0
ubuntu/linux-azure<4.15.0-1191.206~14.04.1
4.15.0-1191.206~14.04.1
ubuntu/linux-aws-hwe<4.15.0-1183.196~16.04.1
4.15.0-1183.196~16.04.1
ubuntu/linux-azure<4.15.0-1191.206~16.04.1
4.15.0-1191.206~16.04.1
ubuntu/linux-gcp<4.15.0-1176.193~16.04.1
4.15.0-1176.193~16.04.1
ubuntu/linux-hwe<4.15.0-240.252~16.04.1
4.15.0-240.252~16.04.1
ubuntu/linux-oracle<4.15.0-1145.156~16.04.1
4.15.0-1145.156~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux<4.15.0-240.252
4.15.0-240.252
ubuntu/linux-aws<4.15.0-1183.196
4.15.0-1183.196
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-aws-5.4<5.4.0-1149.159~18.04.1
5.4.0-1149.159~18.04.1
ubuntu/linux-azure*
ubuntu/linux-azure-4.15<4.15.0-1191.206
4.15.0-1191.206
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-5.4<5.4.0-1154.161~18.04.1
5.4.0-1154.161~18.04.1
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-4.15<4.15.0-1176.193
4.15.0-1176.193
ubuntu/linux-gcp-5.3*
ubuntu/linux-gcp-5.4<5.4.0-1152.161~18.04.1
5.4.0-1152.161~18.04.1
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-5.4<5.4.0-220.240~18.04.1
5.4.0-220.240~18.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-ibm-5.4<5.4.0-1095.100~18.04.1
5.4.0-1095.100~18.04.1
ubuntu/linux-kvm<4.15.0-1166.171
4.15.0-1166.171
ubuntu/linux-oem*
ubuntu/linux-oracle<4.15.0-1145.156
4.15.0-1145.156
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-oracle-5.4<5.4.0-1148.158~18.04.1
5.4.0-1148.158~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1132.145~18.04.1
5.4.0-1132.145~18.04.1
ubuntu/linux-aws-fips<4.15.0-2121.127
4.15.0-2121.127
ubuntu/linux-azure-fips<4.15.0-2100.106
4.15.0-2100.106
ubuntu/linux-fips<4.15.0-1138.149
4.15.0-1138.149
ubuntu/linux-gcp-fips<4.15.0-2084.90
4.15.0-2084.90
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-220.240
5.4.0-220.240
ubuntu/linux-aws<5.4.0-1149.159
5.4.0-1149.159
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.15<5.15.0-1088.95~20.04.1
5.15.0-1088.95~20.04.1
ubuntu/linux-aws-5.8*
ubuntu/linux-azure<5.4.0-1154.161
5.4.0-1154.161
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<5.4.0-1108.115
5.4.0-1108.115
ubuntu/linux-gcp<5.4.0-1152.161
5.4.0-1152.161
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.13*
ubuntu/linux-gcp-5.15<5.15.0-1087.96~20.04.2
5.15.0-1087.96~20.04.2
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<5.15.0-144.157~20.04.1
5.15.0-144.157~20.04.1
ubuntu/linux-hwe-5.8*
ubuntu/linux-ibm<5.4.0-1095.100
5.4.0-1095.100
ubuntu/linux-ibm-5.15<5.15.0-1080.83~20.04.1
5.15.0-1080.83~20.04.1
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<5.4.0-1053.56
5.4.0-1053.56
ubuntu/linux-kvm<5.4.0-1136.145
5.4.0-1136.145
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-144.157~20.04.1
5.15.0-144.157~20.04.1
ubuntu/linux-nvidia-tegra-5.15<5.15.0-1041.41~20.04.1
5.15.0-1041.41~20.04.1
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle<5.4.0-1147.157
5.4.0-1147.157
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.13*
ubuntu/linux-oracle-5.15<5.15.0-1085.91~20.04.3
5.15.0-1085.91~20.04.3
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi<5.4.0-1132.145
5.4.0-1132.145
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.15<5.15.0-1083.87~20.04.1
5.15.0-1083.87~20.04.1
ubuntu/linux-riscv-5.8*
ubuntu/linux-xilinx-zynqmp<5.4.0-1067.71
5.4.0-1067.71
ubuntu/linux-aws-fips<5.4.0-1149.159+fips1
5.4.0-1149.159+fips1
ubuntu/linux-azure-fips<5.4.0-1155.162+fips1
5.4.0-1155.162+fips1
ubuntu/linux-fips<5.4.0-1123.133
5.4.0-1123.133
ubuntu/linux-gcp-fips<5.4.0-1152.161+fips1
5.4.0-1152.161+fips1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.15.0-144.157
5.15.0-144.157
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1088.95
5.15.0-1088.95
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-aws-6.8<6.8.0-1033.35~22.04.1
6.8.0-1033.35~22.04.1
ubuntu/linux-azure<5.15.0-1094.103
5.15.0-1094.103
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-6.8<6.8.0-1034.39~22.04.1
6.8.0-1034.39~22.04.1
ubuntu/linux-azure-fde<5.15.0-1094.103.1
5.15.0-1094.103.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1087.96
5.15.0-1087.96
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gcp-6.8<6.8.0-1034.36~22.04.2
6.8.0-1034.36~22.04.2
ubuntu/linux-gke<5.15.0-1085.91
5.15.0-1085.91
ubuntu/linux-gkeop<5.15.0-1070.78
5.15.0-1070.78
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-hwe-6.8<6.8.0-65.68~22.04.1
6.8.0-65.68~22.04.1
ubuntu/linux-ibm<5.15.0-1080.83
5.15.0-1080.83
ubuntu/linux-ibm-6.8<6.8.0-1030.30~22.04.1
6.8.0-1030.30~22.04.1
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-intel-iotg<5.15.0-1083.89
5.15.0-1083.89
ubuntu/linux-kvm<5.15.0-1084.89
5.15.0-1084.89
ubuntu/linux-lowlatency<5.15.0-144.157
5.15.0-144.157
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-lowlatency-hwe-6.8<6.8.0-65.68.1~22.04.1
6.8.0-65.68.1~22.04.1
ubuntu/linux-nvidia<5.15.0-1082.83
5.15.0-1082.83
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
ubuntu/linux-nvidia-6.8<6.8.0-1032.35~22.04.1
6.8.0-1032.35~22.04.1
ubuntu/linux-nvidia-tegra<5.15.0-1041.41
5.15.0-1041.41
ubuntu/linux-nvidia-tegra-igx<5.15.0-1030.30
5.15.0-1030.30
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-oem-6.5*
ubuntu/linux-oracle<5.15.0-1085.91
5.15.0-1085.91
ubuntu/linux-oracle-6.5*
ubuntu/linux-oracle-6.8<6.8.0-1030.31~22.04.1
6.8.0-1030.31~22.04.1
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<6.8.0-71.71~22.04.1
6.8.0-71.71~22.04.1
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-xilinx-zynqmp<5.15.0-1052.56
5.15.0-1052.56
ubuntu/linux-bluefield<5.15.0-1072.74
5.15.0-1072.74
ubuntu/linux-intel-iot-realtime<5.15.0-1081.83
5.15.0-1081.83
ubuntu/linux-realtime<5.15.0-1088.97
5.15.0-1088.97
ubuntu/linux-realtime-6.8<6.8.1-1026.27~22.04.1
6.8.1-1026.27~22.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-aws-fips<5.15.0-1088.95+fips1
5.15.0-1088.95+fips1
ubuntu/linux-azure-fips<5.15.0-1094.103+fips1
5.15.0-1094.103+fips1
ubuntu/linux-fips<5.15.0-144.157+fips1
5.15.0-144.157+fips1
ubuntu/linux-gcp-fips<5.15.0-1087.96+fips1
5.15.0-1087.96+fips1
ubuntu/linux<6.8.0-71.71
6.8.0-71.71
ubuntu/linux-aws<6.8.0-1033.35
6.8.0-1033.35
ubuntu/linux-azure<6.8.0-1034.39
6.8.0-1034.39
ubuntu/linux-azure-6.11*
ubuntu/linux-azure-nvidia<6.8.0-1022.23
6.8.0-1022.23
ubuntu/linux-gcp<6.8.0-1034.36
6.8.0-1034.36
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<6.8.0-1029.33
6.8.0-1029.33
ubuntu/linux-gkeop<6.8.0-1016.18
6.8.0-1016.18
ubuntu/linux-hwe-6.11*
ubuntu/linux-ibm<6.8.0-1030.30
6.8.0-1030.30
ubuntu/linux-lowlatency<6.8.0-65.68.1
6.8.0-65.68.1
ubuntu/linux-lowlatency-hwe-6.11*
ubuntu/linux-nvidia<6.8.0-1032.35
6.8.0-1032.35
ubuntu/linux-nvidia-6.11*
ubuntu/linux-nvidia-lowlatency<6.8.0-1032.35.1
6.8.0-1032.35.1
ubuntu/linux-nvidia-tegra<6.8.0-1009.9
6.8.0-1009.9
ubuntu/linux-oem-6.11*
ubuntu/linux-oem-6.8<6.8.0-1032.32
6.8.0-1032.32
ubuntu/linux-oracle<6.8.0-1030.31
6.8.0-1030.31
ubuntu/linux-raspi<6.8.0-1032.36
6.8.0-1032.36
ubuntu/linux-raspi-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-xilinx<6.8.0-1017.18
6.8.0-1017.18
ubuntu/linux-raspi-realtime<6.8.0-2028.29
6.8.0-2028.29
ubuntu/linux-realtime<6.8.1-1026.27
6.8.1-1026.27
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 4.15.0-1191.206~14.04.1
  2. Upgrade

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

    Fixed in 4.15.0-1183.196~16.04.1
  3. Upgrade

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

    Fixed in 4.15.0-1191.206~16.04.1
  4. Upgrade

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

    Fixed in 4.15.0-1176.193~16.04.1
  5. Upgrade

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

    Fixed in 4.15.0-240.252~16.04.1
  6. Upgrade

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

    Fixed in 4.15.0-1145.156~16.04.1
  7. Upgrade

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

    Fixed in 4.15.0-240.252
  8. Upgrade

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

    Fixed in 4.15.0-1183.196
  9. Upgrade

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

    Fixed in 5.4.0-1149.159~18.04.1
  10. Upgrade

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

    Fixed in 4.15.0-1191.206
  11. Upgrade

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

    Fixed in 5.4.0-1154.161~18.04.1
  12. Upgrade

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

    Fixed in 4.15.0-1176.193
  13. Upgrade

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

    Fixed in 5.4.0-1152.161~18.04.1
  14. Upgrade

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

    Fixed in 5.4.0-220.240~18.04.1
  15. Upgrade

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

    Fixed in 5.4.0-1095.100~18.04.1
  16. Upgrade

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

    Fixed in 4.15.0-1166.171
  17. Upgrade

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

    Fixed in 4.15.0-1145.156
  18. Upgrade

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

    Fixed in 5.4.0-1148.158~18.04.1
  19. Upgrade

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

    Fixed in 5.4.0-1132.145~18.04.1
  20. Upgrade

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

    Fixed in 4.15.0-2121.127
  21. Upgrade

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

    Fixed in 4.15.0-2100.106
  22. Upgrade

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

    Fixed in 4.15.0-1138.149
  23. Upgrade

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

    Fixed in 4.15.0-2084.90
  24. Upgrade

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

    Fixed in 5.4.0-220.240
  25. Upgrade

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

    Fixed in 5.4.0-1149.159
  26. Upgrade

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

    Fixed in 5.15.0-1088.95~20.04.1
  27. Upgrade

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

    Fixed in 5.4.0-1154.161
  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 5.4.0-1108.115
  30. Upgrade

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

    Fixed in 5.4.0-1152.161
  31. Upgrade

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

    Fixed in 5.15.0-1087.96~20.04.2
  32. Upgrade

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

    Fixed in 5.15.0-144.157~20.04.1
  33. Upgrade

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

    Fixed in 5.4.0-1095.100
  34. Upgrade

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

    Fixed in 5.15.0-1080.83~20.04.1
  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 5.4.0-1053.56
  37. Upgrade

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

    Fixed in 5.4.0-1136.145
  38. Upgrade

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

    Fixed in 5.15.0-144.157~20.04.1
  39. Upgrade

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

    Fixed in 5.15.0-1041.41~20.04.1
  40. Upgrade

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

    Fixed in 5.4.0-1147.157
  41. Upgrade

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

    Fixed in 5.15.0-1085.91~20.04.3
  42. Upgrade

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

    Fixed in 5.4.0-1132.145
  43. Upgrade

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

    Fixed in 5.15.0-1083.87~20.04.1
  44. Upgrade

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

    Fixed in 5.4.0-1067.71
  45. Upgrade

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

    Fixed in 5.4.0-1149.159+fips1
  46. Upgrade

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

    Fixed in 5.4.0-1155.162+fips1
  47. Upgrade

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

    Fixed in 5.4.0-1123.133
  48. Upgrade

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

    Fixed in 5.4.0-1152.161+fips1
  49. Upgrade

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

    Fixed in 5.15.0-144.157
  50. Upgrade

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

    Fixed in 5.15.0-1088.95
  51. Upgrade

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

    Fixed in 6.8.0-1033.35~22.04.1
  52. Upgrade

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

    Fixed in 5.15.0-1094.103
  53. Upgrade

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

    Fixed in 6.8.0-1034.39~22.04.1
  54. Upgrade

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

    Fixed in 5.15.0-1094.103.1
  55. Upgrade

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

    Fixed in 5.15.0-1087.96
  56. Upgrade

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

    Fixed in 6.8.0-1034.36~22.04.2
  57. Upgrade

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

    Fixed in 5.15.0-1085.91
  58. Upgrade

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

    Fixed in 5.15.0-1070.78
  59. Upgrade

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

    Fixed in 6.8.0-65.68~22.04.1
  60. Upgrade

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

    Fixed in 5.15.0-1080.83
  61. Upgrade

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

    Fixed in 6.8.0-1030.30~22.04.1
  62. Upgrade

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

    Fixed in 5.15.0-1083.89
  63. Upgrade

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

    Fixed in 5.15.0-1084.89
  64. Upgrade

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

    Fixed in 5.15.0-144.157
  65. Upgrade

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

    Fixed in 6.8.0-65.68.1~22.04.1
  66. Upgrade

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

    Fixed in 5.15.0-1082.83
  67. Upgrade

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

    Fixed in 6.8.0-1032.35~22.04.1
  68. Upgrade

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

    Fixed in 5.15.0-1041.41
  69. Upgrade

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

    Fixed in 5.15.0-1030.30
  70. Upgrade

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

    Fixed in 5.15.0-1085.91
  71. Upgrade

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

    Fixed in 6.8.0-1030.31~22.04.1
  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 6.8.0-71.71~22.04.1
  74. Upgrade

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

    Fixed in 5.15.0-1052.56
  75. Upgrade

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

    Fixed in 5.15.0-1072.74
  76. Upgrade

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

    Fixed in 5.15.0-1081.83
  77. Upgrade

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

    Fixed in 5.15.0-1088.97
  78. Upgrade

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

    Fixed in 6.8.1-1026.27~22.04.1
  79. Upgrade

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

    Fixed in 5.15.0-1088.95+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 5.15.0-144.157+fips1
  82. Upgrade

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

    Fixed in 5.15.0-1087.96+fips1
  83. Upgrade

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

    Fixed in 6.8.0-71.71
  84. Upgrade

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

    Fixed in 6.8.0-1033.35
  85. Upgrade

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

    Fixed in 6.8.0-1034.39
  86. Upgrade

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

    Fixed in 6.8.0-1022.23
  87. Upgrade

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

    Fixed in 6.8.0-1034.36
  88. Upgrade

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

    Fixed in 6.14.0-1011.11~24.04.1
  89. Upgrade

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

    Fixed in 6.8.0-1029.33
  90. Upgrade

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

    Fixed in 6.8.0-1016.18
  91. Upgrade

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

    Fixed in 6.8.0-1030.30
  92. Upgrade

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

    Fixed in 6.8.0-65.68.1
  93. Upgrade

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

    Fixed in 6.8.0-1032.35
  94. Upgrade

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

    Fixed in 6.8.0-1032.35.1
  95. Upgrade

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

    Fixed in 6.8.0-1009.9
  96. Upgrade

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

    Fixed in 6.8.0-1032.32
  97. Upgrade

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

    Fixed in 6.8.0-1030.31
  98. Upgrade

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

    Fixed in 6.8.0-1032.36
  99. Upgrade

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

    Fixed in 6.8.0-1017.18
  100. Upgrade

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

    Fixed in 6.8.0-2028.29
  101. Upgrade

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

    Fixed in 6.8.1-1026.27
  102. Upgrade

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

    Fixed in 6.14.0-1010.10~24.04.1
  103. Upgrade

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

    Fixed in 6.8.0-78.78+fips1

Event History

May 2, 2025
CVE Published
via MITRE·02:16 PM
Data Sourced
via MITRE·02:16 PM
DescriptionSeverity
Data Sourced
via Red Hat·03:01 PM
DescriptionSeverityAffected Software
Data Sourced
via OSV·03:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·03:15 PM
RemedyDescriptionSeverityWeaknessAffected 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-2025-37797?

CVE-2025-37797 has been classified as a high severity vulnerability due to its potential to allow remote code execution.

2

How do I fix CVE-2025-37797?

To fix CVE-2025-37797, upgrade your Linux kernel to the latest stable version where the vulnerability has been patched.

3

Who is affected by CVE-2025-37797?

CVE-2025-37797 affects all distributions of the Linux kernel that utilize the hfsc qdisc class handling.

4

What type of vulnerability is CVE-2025-37797?

CVE-2025-37797 is identified as a Use-After-Free (UAF) vulnerability, which can lead to arbitrary code execution.

5

Is there a workaround for CVE-2025-37797?

Currently, the best mitigation for CVE-2025-37797 is to apply the kernel patch or upgrade to a patched version.

Company

Resources

Contact

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