Vulnerability · Published Sep 5, 2025 · Assigned by Linux
CVE-2025-39718vsock/virtio: Validate length in packet header before skb_put()
High 8.4
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 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.4High
Exploit odds (30 days)0.2%top 93.9% 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: vsock/virtio: Validate length in packet header before skb_put() When receiving a vsock packet in the guest, only the virtqueue buffer size is validated prior to virtio_vsock_skb_rx_put(). Unfortunately, virtio_vsock_skb_rx_put() uses the length from the packet header as the length argument to skb_put(), potentially resulting in SKB overflow if the host has gone wonky. Validate the length as advertised by the packet header before calling virtio_vsock_skb_rx_put().
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | bpftool | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-abi-stablelists | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-core | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-cross-headers | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-debug | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-debug-core | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-debug-devel | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-debug-modules | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-debug-modules-extra | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-devel | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-doc | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-headers | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-modules | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-modules-extra | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-rt | 4.18.0-553.84.1.rt7.425.el8_10 | ALSA-2025:21397 |
| AlmaLinux:8 | kernel-rt-core | 4.18.0-553.84.1.rt7.425.el8_10 | ALSA-2025:21397 |
| AlmaLinux:8 | kernel-rt-debug | 4.18.0-553.84.1.rt7.425.el8_10 | ALSA-2025:21397 |
| AlmaLinux:8 | kernel-rt-debug-core | 4.18.0-553.84.1.rt7.425.el8_10 | ALSA-2025:21397 |
| AlmaLinux:8 | kernel-rt-debug-devel | 4.18.0-553.84.1.rt7.425.el8_10 | ALSA-2025:21397 |
| AlmaLinux:8 | kernel-rt-debug-modules | 4.18.0-553.84.1.rt7.425.el8_10 | ALSA-2025:21397 |
| AlmaLinux:8 | kernel-rt-debug-modules-extra | 4.18.0-553.84.1.rt7.425.el8_10 | ALSA-2025:21397 |
| AlmaLinux:8 | kernel-rt-devel | 4.18.0-553.84.1.rt7.425.el8_10 | ALSA-2025:21397 |
| AlmaLinux:8 | kernel-rt-modules | 4.18.0-553.84.1.rt7.425.el8_10 | ALSA-2025:21397 |
| AlmaLinux:8 | kernel-rt-modules-extra | 4.18.0-553.84.1.rt7.425.el8_10 | ALSA-2025:21397 |
| AlmaLinux:8 | kernel-tools | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-tools-libs | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-tools-libs-devel | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-zfcpdump | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-zfcpdump-core | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-zfcpdump-devel | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-zfcpdump-modules | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | kernel-zfcpdump-modules-extra | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | perf | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| AlmaLinux:8 | python3-perf | 4.18.0-553.84.1.el8_10 | ALSA-2025:21398 |
| Debian:12 | linux | 6.1.153-1 | DEBIAN-CVE-2025-39718 |
| Debian:13 | linux | 6.12.48-1 | DEBIAN-CVE-2025-39718 |
| Debian:14 | linux | 6.16.5-1 | DEBIAN-CVE-2025-39718 |
| Rocky Linux:10 | kernel | 0:6.12.0-55.41.1.el10_0 | RLSA-2025:19106 |
| Rocky Linux:9 | kernel | 0:5.14.0-570.58.1.el9_6 | RLSA-2025:19105 |
| Ubuntu:24.04:LTS | linux | 6.8.0-100.100 | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1046.49 | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-aws-6.14 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-aws-6.5 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1046.49~22.04.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-azure | 6.8.0-1046.52 | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-azure-6.14 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-azure-6.5 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 6.8.0-1051.57~22.04.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-azure-fde | 6.8.0-1046.53 | UBUNTU-CVE-2025-39718 |
| Ubuntu:25.10 | linux-azure-fde | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-azure-fde-6.14 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.8 | 6.8.0-1046.53~22.04.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-azure-nvidia-6.14 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1047.50 | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-gcp-6.14 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-gcp-6.5 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1047.50~22.04.2 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1043.48 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1030.33 | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-hwe-6.14 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 6.8.0-100.100~22.04.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1044.44 | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | 6.8.0-1044.44~22.04.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-intel | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-100.100.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-100.100.1~22.04.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1046.49 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-nvidia-6.11 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-nvidia-6.5 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1046.49~22.04.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1046.49.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 6.8.0-1020.20 | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-oem-6.14 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-oem-6.5 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1043.44 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-oracle-6.14 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-oracle-6.5 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1043.44~22.04.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1047.51 | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-riscv-6.14 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-riscv-6.8 | 6.8.0-100.100~22.04.1 | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:22.04:LTS | linux-starfive-6.5 | no fix listed | UBUNTU-CVE-2025-39718 |
| Ubuntu:24.04:LTS | linux-xilinx | 6.8.0-1023.24 | UBUNTU-CVE-2025-39718 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | baddcc2c71572968cdaeee1c4ab3dc0ad90fa765 – before 969b06bd8b7560efb100a34227619e7d318fbe0571dc9ec9ac7d3eee785cdc986c3daeb821381e20 – before ee438c492b2e0705d819ac0e25d04fae758d8f8f71dc9ec9ac7d3eee785cdc986c3daeb821381e20 – before faf332a10372390ce65d0b803888f4b25a38833571dc9ec9ac7d3eee785cdc986c3daeb821381e20 – before 676f03760ca1d69c2470cef36c44dc152494b47c71dc9ec9ac7d3eee785cdc986c3daeb821381e20 – before 0dab92484474587b82e8e0455839eaf5ac7bf8946.1.63 – before 6.1.149 |
| Linux | Linux | 6.3 |
References
- https://git.kernel.org/stable/c/969b06bd8b7560efb100a34227619e7d318fbe05
- https://git.kernel.org/stable/c/ee438c492b2e0705d819ac0e25d04fae758d8f8f
- https://git.kernel.org/stable/c/faf332a10372390ce65d0b803888f4b25a388335
- https://git.kernel.org/stable/c/676f03760ca1d69c2470cef36c44dc152494b47c
- https://git.kernel.org/stable/c/0dab92484474587b82e8e0455839eaf5ac7bf894
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html