Vulnerability · Published May 2, 2025 · Assigned by Linux
CVE-2025-37798codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog()
High 7.8
In plain English
A high-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 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 86.3% 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: codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() After making all ->qlen_notify() callbacks idempotent, now it is safe to remove the check of qlen!=0 from both fq_codel_dequeue() and codel_qdisc_dequeue().
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 6.1.135-1 | DEBIAN-CVE-2025-37798 |
| Debian:13 | linux | 6.12.25-1 | DEBIAN-CVE-2025-37798 |
| Debian:14 | linux | 6.12.25-1 | DEBIAN-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux | 5.15.0-143.153 | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| 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-2025-37798 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-aws-6.5 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1031.33~22.04.1 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1031.33~22.04.1 | USN-7609-1 |
| 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-2025-37798 |
| 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-2025-37798 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | 6.11.0-1018.18~24.04.1 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-azure-6.5 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 6.8.0-1031.36~22.04.1 | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| Ubuntu:25.10 | linux-azure-fde | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | 6.8.0-1019.20 | UBUNTU-CVE-2025-37798 |
| 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 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-gcp | 5.15.0-1086.95 | USN-7608-1 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1032.34 | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1032.34 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2025-37798 |
| 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-6.11 | 6.11.0-1017.17~24.04.1 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-gcp-6.5 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1032.34~22.04.1 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1032.34~22.04.1 | USN-7609-1 |
| 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-2025-37798 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1027.31 | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1027.31 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1069.77 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-gkeop | 5.15.0-1069.77 | USN-7608-1 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1014.16 | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | 6.11.0-29.29~24.04.1 | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | 6.11.0-29.29~24.04.1 | USN-7610-1 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 6.8.0-64.67~22.04.1 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1079.82 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-ibm | 5.15.0-1079.82 | USN-7608-1 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1028.28 | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| Ubuntu:22.04:LTS | linux-kvm | 5.15.0-1083.88 | UBUNTU-CVE-2025-37798 |
| 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 | USN-7608-1 |
| Ubuntu:22.04:LTS | linux-lowlatency | 5.15.0-143.153 | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | 6.11.0-1016.17~24.04.1 | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-63.66.1~22.04.1 | UBUNTU-CVE-2025-37798 |
| 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 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-nvidia | 5.15.0-1081.82 | USN-7608-1 |
| 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-2025-37798 |
| Ubuntu:24.04:LTS | linux-nvidia-6.11 | 6.11.0-1012.12 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-nvidia-6.5 | no fix listed | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1030.33.1 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1030.33.1 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1040.40 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | 5.15.0-1040.40 | USN-7608-5 |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 6.8.0-1008.8 | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 6.11.0-1025.25 | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | 6.11.0-1025.25 | USN-7610-2 |
| Ubuntu:22.04:LTS | linux-oem-6.5 | no fix listed | UBUNTU-CVE-2025-37798 |
| 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-2025-37798 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1084.90 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-oracle | 5.15.0-1084.90 | USN-7608-1 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1028.29 | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1028.29 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-oracle-6.5 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1028.29~22.04.1 | USN-7609-1 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1028.29~22.04.1 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-raspi | 5.15.0-1083.86 | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1030.34 | USN-7609-1 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1030.34 | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-riscv-6.8 | 6.8.0-63.66~22.04.1 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-starfive-6.5 | no fix listed | UBUNTU-CVE-2025-37798 |
| Ubuntu:24.04:LTS | linux-xilinx | 6.8.0-1017.18 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 5.15.0-1051.55 | UBUNTU-CVE-2025-37798 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | 5.15.0-1051.55 | USN-7608-6 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 76e3cc126bb223013a6b9a0e2a51238d1ef2e409 – before 7a742a9506849d1c1aa71e36c89855ceddc7d58e76e3cc126bb223013a6b9a0e2a51238d1ef2e409 – before cc71a757da78dd4aa1b4a9b19cb011833730ccf276e3cc126bb223013a6b9a0e2a51238d1ef2e409 – before eda741fe155ddf5ecd2dd3bfbd4fc3c0c7dbb45076e3cc126bb223013a6b9a0e2a51238d1ef2e409 – before 829c49b6b2ff45b043739168fd1245e4e1a91a3076e3cc126bb223013a6b9a0e2a51238d1ef2e409 – before 2f9761a94bae33d26e6a81b31b36e7d776d93dc176e3cc126bb223013a6b9a0e2a51238d1ef2e409 – before 4d55144b12e742404bb3f8fee6038bafbf45619d76e3cc126bb223013a6b9a0e2a51238d1ef2e409 – before e73c838c80dccb9e4f19becc11d9f3cb4a27d48376e3cc126bb223013a6b9a0e2a51238d1ef2e409 – before a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31 |
| Linux | Linux | 3.5 |
References
- https://git.kernel.org/stable/c/7a742a9506849d1c1aa71e36c89855ceddc7d58e
- https://git.kernel.org/stable/c/cc71a757da78dd4aa1b4a9b19cb011833730ccf2
- https://git.kernel.org/stable/c/eda741fe155ddf5ecd2dd3bfbd4fc3c0c7dbb450
- https://git.kernel.org/stable/c/829c49b6b2ff45b043739168fd1245e4e1a91a30
- https://git.kernel.org/stable/c/2f9761a94bae33d26e6a81b31b36e7d776d93dc1
- https://git.kernel.org/stable/c/4d55144b12e742404bb3f8fee6038bafbf45619d
- https://git.kernel.org/stable/c/e73c838c80dccb9e4f19becc11d9f3cb4a27d483
- https://git.kernel.org/stable/c/a57fe60ef4cf96bfbb6b58397ec28bdb5a5c6b31
- https://git.kernel.org/stable/c/342debc12183b51773b3345ba267e9263bdfaaef
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html