CVE-2025-38001: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice

Published Jun 6, 2025
·
Updated

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

netsched: hfsc: Address reentrant enqueue adding class to eltree twice

Savino says: "We are writing to report that this recent patch (141d34391abbb315d68556b7c67ad97885407547) [1] can be bypassed, and a UAF can still occur when HFSC is utilized with NETEM.

The patch only checks the cl->clnactive field to determine whether it is the first insertion or not [2], but this field is only incremented by initvf [3].

By using HFSCRSC (which uses inited) [4], it is possible to bypass the check and insert the class twice in the eltree. Under normal conditions, this would lead to an infinite loop in hfscdequeue for the reasons we already explained in this report [5].

However, if TBF is added as root qdisc and it is configured with a very low rate, it can be utilized to prevent packets from being dequeued. This behavior can be exploited to perform subsequent insertions in the HFSC eltree and cause a UAF."

To fix both the UAF and the infinite loop, with netem as an hfsc child, check explicitly in hfscenqueue whether the class is already in the eltree whenever the HFSCRSC flag is set.

[1] https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=141d34391abbb315d68556b7c67ad97885407547 [2] https://elixir.bootlin.com/linux/v6.15-rc5/source/net/sched/schhfsc.c#L1572 [3] https://elixir.bootlin.com/linux/v6.15-rc5/source/net/sched/schhfsc.c#L677 [4] https://elixir.bootlin.com/linux/v6.15-rc5/source/net/sched/schhfsc.c#L1574 [5] https://lore.kernel.org/netdev/8DuRWwfqjoRDLDmBMlIfbrsZg9Gx50DHJc1ilxsEBNe2D6NMoigReIRIG0LOjMc3r10nUUZtArXx4oZBIdUfZQrwjcQhdinnMis0G7VEk=@willsroot.io/T/#u

Affected Software

206 affected componentsFixes available
Linux Linux kernel
Linux Linux kernel>=5.0.1<5.4.294
Linux Linux kernel>=5.5<5.10.238
Linux Linux kernel>=5.11<5.15.185
Linux Linux kernel>=5.16<6.1.141
Linux Linux kernel>=6.2<6.6.93
Linux Linux kernel>=6.7<6.12.32
Linux Linux kernel>=6.13<6.14.10
Linux Linux kernel>=6.15<6.15.1
Linux Linux kernel=5.0
Linux Linux kernel=5.0-rc3
Linux Linux kernel=5.0-rc4
Linux Linux kernel=5.0-rc5
Linux Linux kernel=5.0-rc6
Linux Linux kernel=5.0-rc7
Linux Linux kernel=5.0-rc8
Debian Debian Linux=11.0
Debian Debian Linux=12.0
ubuntu/linux-hwe-edge*
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-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-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-oem*
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<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<6.11.0-1018.18~24.04.1
6.11.0-1018.18~24.04.1
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<6.11.0-1017.17~24.04.1
6.11.0-1017.17~24.04.1
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<6.11.0-29.29~24.04.1
6.11.0-29.29~24.04.1
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<6.11.0-1016.17~24.04.1
6.11.0-1016.17~24.04.1
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*
debian/linux
6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.4-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 5.4.0-1148.158~18.04.1
  2. Upgrade

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

    Fixed in 5.4.0-1153.160~18.04.1
  3. Upgrade

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

    Fixed in 5.4.0-1151.160~18.04.1
  4. Upgrade

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

    Fixed in 5.4.0-219.239~18.04.1
  5. Upgrade

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

    Fixed in 5.4.0-1094.99~18.04.1
  6. Upgrade

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

    Fixed in 5.4.0-1146.156~18.04.1
  7. Upgrade

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

    Fixed in 5.4.0-1131.144~18.04.1
  8. Upgrade

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

    Fixed in 5.4.0-219.239
  9. Upgrade

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

    Fixed in 5.4.0-1148.158
  10. Upgrade

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

    Fixed in 5.15.0-1087.94~20.04.1
  11. Upgrade

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

    Fixed in 5.4.0-1153.160
  12. Upgrade

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

    Fixed in 5.15.0-1094.103~20.04.1
  13. Upgrade

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

    Fixed in 5.4.0-1107.114
  14. Upgrade

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

    Fixed in 5.4.0-1151.160
  15. Upgrade

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

    Fixed in 5.15.0-1086.95~20.04.1
  16. Upgrade

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

    Fixed in 5.15.0-143.153~20.04.1
  17. Upgrade

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

    Fixed in 5.4.0-1094.99
  18. Upgrade

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

    Fixed in 5.15.0-1079.82~20.04.1
  19. 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
  20. Upgrade

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

    Fixed in 5.4.0-1052.55
  21. Upgrade

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

    Fixed in 5.4.0-1135.144
  22. 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
  23. 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
  24. Upgrade

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

    Fixed in 5.4.0-1146.156
  25. Upgrade

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

    Fixed in 5.15.0-1084.90~20.04.1
  26. Upgrade

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

    Fixed in 5.4.0-1131.144
  27. Upgrade

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

    Fixed in 5.15.0-1082.86~20.04.1
  28. Upgrade

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

    Fixed in 5.4.0-1066.70
  29. Upgrade

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

    Fixed in 5.4.0-1148.158+fips1
  30. Upgrade

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

    Fixed in 5.4.0-1154.161+fips1
  31. Upgrade

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

    Fixed in 5.4.0-1122.132
  32. Upgrade

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

    Fixed in 5.4.0-1151.160+fips1
  33. Upgrade

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

    Fixed in 5.15.0-143.153
  34. Upgrade

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

    Fixed in 5.15.0-1087.94
  35. Upgrade

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

    Fixed in 6.8.0-1031.33~22.04.1
  36. Upgrade

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

    Fixed in 5.15.0-1092.101
  37. Upgrade

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

    Fixed in 6.8.0-1031.36~22.04.1
  38. Upgrade

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

    Fixed in 5.15.0-1092.101.1
  39. Upgrade

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

    Fixed in 5.15.0-1086.95
  40. Upgrade

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

    Fixed in 6.8.0-1032.34~22.04.1
  41. Upgrade

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

    Fixed in 5.15.0-1084.90
  42. Upgrade

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

    Fixed in 5.15.0-1069.77
  43. Upgrade

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

    Fixed in 6.8.0-64.67~22.04.1
  44. Upgrade

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

    Fixed in 5.15.0-1079.82
  45. Upgrade

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

    Fixed in 6.8.0-1028.28~22.04.1
  46. Upgrade

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

    Fixed in 5.15.0-1082.88
  47. Upgrade

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

    Fixed in 5.15.0-1083.88
  48. Upgrade

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

    Fixed in 5.15.0-143.153
  49. 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
  50. Upgrade

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

    Fixed in 5.15.0-1081.82
  51. Upgrade

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

    Fixed in 6.8.0-1030.33~22.04.1
  52. Upgrade

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

    Fixed in 5.15.0-1040.40
  53. Upgrade

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

    Fixed in 5.15.0-1029.29
  54. Upgrade

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

    Fixed in 5.15.0-1084.90
  55. Upgrade

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

    Fixed in 6.8.0-1028.29~22.04.1
  56. Upgrade

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

    Fixed in 5.15.0-1083.86
  57. Upgrade

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

    Fixed in 6.8.0-63.66~22.04.1
  58. Upgrade

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

    Fixed in 5.15.0-1051.55
  59. Upgrade

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

    Fixed in 5.15.0-1070.72
  60. Upgrade

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

    Fixed in 5.15.0-1080.82
  61. Upgrade

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

    Fixed in 5.15.0-1087.96
  62. Upgrade

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

    Fixed in 6.8.1-1024.25~22.04.1
  63. Upgrade

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

    Fixed in 5.15.0-1087.94+fips1
  64. Upgrade

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

    Fixed in 5.15.0-1094.103+fips1
  65. Upgrade

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

    Fixed in 5.15.0-143.153+fips1
  66. Upgrade

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

    Fixed in 5.15.0-1086.95+fips1
  67. Upgrade

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

    Fixed in 6.8.0-63.66
  68. Upgrade

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

    Fixed in 6.8.0-1031.33
  69. Upgrade

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

    Fixed in 6.14.0-1009.9~24.04.1
  70. Upgrade

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

    Fixed in 6.8.0-1031.36
  71. Upgrade

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

    Fixed in 6.11.0-1018.18~24.04.1
  72. Upgrade

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

    Fixed in 6.8.0-1019.20
  73. Upgrade

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

    Fixed in 6.8.0-1032.34
  74. Upgrade

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

    Fixed in 6.11.0-1017.17~24.04.1
  75. Upgrade

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

    Fixed in 6.14.0-1011.11~24.04.1
  76. Upgrade

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

    Fixed in 6.8.0-1027.31
  77. Upgrade

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

    Fixed in 6.8.0-1014.16
  78. Upgrade

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

    Fixed in 6.11.0-29.29~24.04.1
  79. Upgrade

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

    Fixed in 6.8.0-1028.28
  80. Upgrade

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

    Fixed in 6.8.0-63.66.1
  81. Upgrade

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

    Fixed in 6.11.0-1016.17~24.04.1
  82. Upgrade

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

    Fixed in 6.8.0-1030.33
  83. Upgrade

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

    Fixed in 6.11.0-1012.12
  84. Upgrade

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

    Fixed in 6.8.0-1030.33.1
  85. Upgrade

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

    Fixed in 6.8.0-1008.8
  86. Upgrade

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

    Fixed in 6.11.0-1025.25
  87. Upgrade

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

    Fixed in 6.14.0-1006.6
  88. Upgrade

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

    Fixed in 6.8.0-1030.30
  89. Upgrade

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

    Fixed in 6.8.0-1028.29
  90. Upgrade

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

    Fixed in 6.14.0-1009.9~24.04.1
  91. Upgrade

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

    Fixed in 6.8.0-1030.34
  92. 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
  93. Upgrade

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

    Fixed in 6.8.0-1017.18
  94. Upgrade

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

    Fixed in 6.8.0-2025.26
  95. Upgrade

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

    Fixed in 6.8.1-1024.25
  96. Upgrade

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

    Fixed in 6.14.0-1010.10~24.04.1
  97. Upgrade

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

    Fixed in 6.8.0-78.78+fips1
  98. Upgrade

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

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.4-1
  99. Compensating control

    In hfsc_enqueue, when the HFSC_RSC flag is set, explicitly check whether the class is already in the eltree before inserting it, to prevent the UAF and infinite loop.

Event History

Jun 6, 2025
CVE Published
via MITRE·01:41 PM
Data Sourced
via MITRE·01:41 PM
DescriptionSeverity
Data Sourced
via Red Hat·02:03 PM
DescriptionSeverityAffected Software
Data Sourced
via OSV·02:15 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·02:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jul 11, 2025
Exploit Published
via GitHub·06:34 PM

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-2025-38001?

The severity of CVE-2025-38001 is currently under analysis as it was recently patched in the Linux kernel.

2

How do I fix CVE-2025-38001?

To fix CVE-2025-38001, you should update your Linux kernel to the latest version where the vulnerability has been resolved.

3

Which versions of the Linux kernel are affected by CVE-2025-38001?

CVE-2025-38001 affects specific versions of the Linux kernel prior to the application of the relevant patch.

4

What type of vulnerability is CVE-2025-38001?

CVE-2025-38001 is a vulnerability in the net_sched component of the Linux kernel related to address reentrancy.

5

Is there a known exploit for CVE-2025-38001?

Currently, there are no public details indicating the existence of an exploit for CVE-2025-38001.

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