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Vulnerability · Published Sep 4, 2025 · Assigned by Linux

CVE-2025-38717net: kcm: Fix race condition in kcm_unattach()

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 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 98.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: net: kcm: Fix race condition in kcm_unattach() syzbot found a race condition when kcm_unattach(psock) and kcm_release(kcm) are executed at the same time. kcm_unattach() is missing a check of the flag kcm->tx_stopped before calling queue_work(). If the kcm has a reserved psock, kcm_unattach() might get executed between cancel_work_sync() and unreserve_psock() in kcm_release(), requeuing kcm->tx_work right before kcm gets freed in kcm_done(). Remove kcm->tx_stopped and replace it by the less error-prone disable_work_sync().

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2025-38717
Debian:13linux6.12.43-1DEBIAN-CVE-2025-38717
Debian:14linux6.16.3-1DEBIAN-CVE-2025-38717
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-38717
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38USN-8781-1
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2025-38717
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2025-38717
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2025-38717

Affected products (as reported)

VendorProductVersions
Linux Linux ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 – before c0bffbc92a1ca3960fb9cdb8e9f75a68468eb308ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 – before 7275dc3bb8f91b23125ff3f47b6529935cf46152ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 – before 798733ee5d5788b12e8a52db1519abc17e826f69ab7ac4eb9832e32a09f4e8042705484d2fb0aad3 – before 52565a935213cd6a8662ddb8efe5b4219343a25d
Linux Linux 4.6

References