Vulnerability · Published May 20, 2025 · Assigned by Linux
CVE-2025-37932sch_htb: make htb_qlen_notify() idempotent
Medium 5.5
In plain English
A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 85.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In the Linux kernel, the following vulnerability has been resolved: sch_htb: make htb_qlen_notify() idempotent htb_qlen_notify() always deactivates the HTB class and in fact could trigger a warning if it is already deactivated. Therefore, it is not idempotent and not friendly to its callers, like fq_codel_dequeue(). Let's make it idempotent to ease qdisc_tree_reduce_backlog() callers' life.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 6.1.140-1 | DSA-5925-1 |
| Debian:12 | linux | 6.1.140-1 | DEBIAN-CVE-2025-37932 |
| Debian:13 | linux | 6.12.29-1 | DEBIAN-CVE-2025-37932 |
| Debian:14 | linux | 6.12.29-1 | DEBIAN-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux | 5.15.0-143.153 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux | 5.15.0-143.153 | USN-7608-1 |
| Ubuntu:24.04:LTS | linux | 6.8.0-63.66 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux | 6.8.0-63.66 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1087.94 | USN-7608-1 |
| Ubuntu:22.04:LTS | linux-aws | 5.15.0-1087.94 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1031.33 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1031.33 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-aws-6.14 | 6.14.0-1009.9~24.04.1 | USN-7665-2 |
| Ubuntu:24.04:LTS | linux-aws-6.14 | 6.14.0-1009.9~24.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-aws-6.5 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1031.33~22.04.1 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1031.33~22.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1092.101 | USN-7608-7 |
| Ubuntu:22.04:LTS | linux-azure | 5.15.0-1092.101 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-azure | 6.8.0-1031.36 | USN-7609-4 |
| Ubuntu:24.04:LTS | linux-azure | 6.8.0-1031.36 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | 6.11.0-1018.18~24.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-azure-6.5 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 6.8.0-1031.36~22.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 6.8.0-1031.36~22.04.1 | USN-7609-5 |
| Ubuntu:22.04:LTS | linux-azure-fde | 5.15.0-1092.101.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:25.10 | linux-azure-fde | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | 6.8.0-1019.20 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | 6.8.0-1019.20 | USN-7609-5 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1086.95 | USN-7608-1 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1086.95 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1032.34 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1032.34 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | 6.11.0-1017.17~24.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | 6.11.0-1017.17~24.04.1 | USN-7610-1 |
| Ubuntu:24.04:LTS | linux-gcp-6.14 | 6.14.0-1011.11~24.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-gcp-6.5 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1032.34~22.04.1 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1032.34~22.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1084.90 | USN-7608-1 |
| Ubuntu:22.04:LTS | linux-gke | 5.15.0-1084.90 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1027.31 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1027.31 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1069.77 | USN-7608-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1069.77 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1014.16 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1014.16 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | 6.11.0-29.29~24.04.1 | USN-7610-1 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | 6.11.0-29.29~24.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 6.8.0-64.67~22.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1079.82 | USN-7608-1 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1079.82 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1028.28 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1028.28 | USN-7609-3 |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | 6.8.0-1028.28~22.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1082.88 | USN-7608-5 |
| Ubuntu:22.04:LTS | linux-intel-iotg | 5.15.0-1082.88 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1083.88 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1083.88 | USN-7608-1 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-143.153 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-143.153 | USN-7608-1 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-63.66.1 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-63.66.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1016.17~24.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1016.17~24.04.1 | USN-7610-3 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-63.66.1~22.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-63.66.1~22.04.1 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1081.82 | USN-7608-1 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1081.82 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1030.33 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1030.33 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-nvidia-6.11 | 6.11.0-1012.12 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-nvidia-6.5 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1030.33~22.04.1 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1030.33~22.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1030.33.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1030.33.1 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1040.40 | USN-7608-5 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1040.40 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 6.8.0-1008.8 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra-igx | 5.15.0-1029.29 | USN-7608-5 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra-igx | 5.15.0-1029.29 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 6.11.0-1025.25 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 6.11.0-1025.25 | USN-7610-2 |
| Ubuntu:24.04:LTS | linux-oem-6.14 | 6.14.0-1006.6 | USN-7618-1 |
| Ubuntu:24.04:LTS | linux-oem-6.14 | 6.14.0-1006.6 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-oem-6.5 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | 6.8.0-1030.30 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | 6.8.0-1030.30 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1084.90 | USN-7608-1 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1084.90 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1028.29 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1028.29 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-oracle-6.14 | 6.14.0-1009.9~24.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-oracle-6.5 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1028.29~22.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1028.29~22.04.1 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1083.86 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1030.34 | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1030.34 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-riscv-6.14 | 6.14.0-23.23.1~24.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-riscv-6.8 | 6.8.0-63.66~22.04.1 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-starfive-6.5 | no fix listed | UBUNTU-CVE-2025-37932 |
| Ubuntu:24.04:LTS | linux-xilinx | 6.8.0-1017.18 | UBUNTU-CVE-2025-37932 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 5.15.0-1051.55 | USN-7608-6 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 5.15.0-1051.55 | UBUNTU-CVE-2025-37932 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 959466588aa7f84ccf79ae36a1d89542eaf9aaec – before e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1959466588aa7f84ccf79ae36a1d89542eaf9aaec – before 32ae12ce6a9f6bace186ca7335220ff59b6cc3cd959466588aa7f84ccf79ae36a1d89542eaf9aaec – before 967955c9e57f8eebfccc298037d4aaf3d42bc1c9959466588aa7f84ccf79ae36a1d89542eaf9aaec – before 73cf6af13153d62f9b76eff422eea79dbc70f15e959466588aa7f84ccf79ae36a1d89542eaf9aaec – before bbbf5e0f87078b715e7a665d662a2c0e77f044ae959466588aa7f84ccf79ae36a1d89542eaf9aaec – before 0a188c0e197383683fd093ab1ea6ce9a5869a6ea959466588aa7f84ccf79ae36a1d89542eaf9aaec – before a61f1b5921761fbaf166231418bc1db301e5bf59959466588aa7f84ccf79ae36a1d89542eaf9aaec – before 5ba8b837b522d7051ef81bacf3d95383ff8edce5 |
| Linux | Linux | 4.14 |
References
- https://git.kernel.org/stable/c/e6b45f4de763b00dc1c55e685e2dd1aaf525d3c1
- https://git.kernel.org/stable/c/32ae12ce6a9f6bace186ca7335220ff59b6cc3cd
- https://git.kernel.org/stable/c/967955c9e57f8eebfccc298037d4aaf3d42bc1c9
- https://git.kernel.org/stable/c/73cf6af13153d62f9b76eff422eea79dbc70f15e
- https://git.kernel.org/stable/c/bbbf5e0f87078b715e7a665d662a2c0e77f044ae
- https://git.kernel.org/stable/c/0a188c0e197383683fd093ab1ea6ce9a5869a6ea
- https://git.kernel.org/stable/c/a61f1b5921761fbaf166231418bc1db301e5bf59
- https://git.kernel.org/stable/c/5ba8b837b522d7051ef81bacf3d95383ff8edce5
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html