Log in Start free

Vulnerability · Published Jan 31, 2026 · Assigned by Linux

CVE-2025-71182can: j1939: make j1939_session_activate() fail if device is no longer registered

Medium 5.5

In plain English

A medium-severity race condition 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 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.1%top 96.9% 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: can: j1939: make j1939_session_activate() fail if device is no longer registered syzbot is still reporting unregister_netdevice: waiting for vcan0 to become free. Usage count = 2 even after commit 93a27b5891b8 ("can: j1939: add missing calls in NETDEV_UNREGISTER notification handler") was added. A debug printk() patch found that j1939_session_activate() can succeed even after j1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER) has completed. Since j1939_cancel_active_session() is processed with the session list lock held, checking ndev->reg_state in j1939_session_activate() with the session list lock held can reliably close the race window.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.162-1DEBIAN-CVE-2025-71182
Debian:13linux6.12.69-1DEBIAN-CVE-2025-71182
Debian:14linux6.18.8-1DEBIAN-CVE-2025-71182
Ubuntu:22.04:LTSlinux5.15.0-173.183UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux6.8.0-117.117UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux6.8.0-117.117USN-8278-1
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-aws5.15.0-1103.110UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-aws6.8.0-1055.58UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-aws6.8.0-1055.58USN-8278-1
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1057.60~22.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-azure5.15.0-1109.118UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-azure6.8.0-1056.62USN-8278-2
Ubuntu:24.04:LTSlinux-azure6.8.0-1056.62UBUNTU-CVE-2025-71182
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-azure-6.176.17.0-1021.21~24.04.1USN-8604-1
Ubuntu:24.04:LTSlinux-azure-6.176.17.0-1021.21~24.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1059.65~22.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1109.118.1UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1058.65UBUNTU-CVE-2025-71182
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-azure-fde-6.176.17.0-1018.18~24.04.1USN-8605-1
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1058.65~22.04.1UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-gcp5.15.0-1103.112UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-gcp6.8.0-1058.61UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-gcp6.8.0-1058.61USN-8278-1
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1021.24~24.04.1USN-8570-1
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1021.24~24.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1060.63~22.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-gke5.15.0-1099.105UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-gke6.8.0-1054.60USN-8278-1
Ubuntu:24.04:LTSlinux-gke6.8.0-1054.60UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1086.94UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1041.44UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1041.44USN-8278-1
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-hwe-6.176.17.0-41.41~24.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-124.124~22.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-ibm5.15.0-1097.100UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-ibm6.8.0-1055.56UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-ibm6.8.0-1055.56USN-8278-1
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1055.56~22.04.1USN-8278-1
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1055.56~22.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1098.104UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-kvm5.15.0-1095.100UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-173.183UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-117.117.1UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-117.117.1USN-8278-1
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-117.117.1~22.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-117.117.1~22.04.1USN-8278-1
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1098.99UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1054.57USN-8289-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1054.57UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1031.31USN-8669-1
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1031.31UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1054.57~22.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1054.57~22.04.1USN-8289-2
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1054.57.1UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1054.57.1USN-8289-1
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1055.55UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1024.24USN-8296-2
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1024.24UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1044.44UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1030.30USN-8594-1
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1030.30UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-oracle5.15.0-1100.106UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-oracle6.8.0-1054.55UBUNTU-CVE-2025-71182
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1019.19~24.04.3USN-8570-2
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1019.19~24.04.3UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1054.55~22.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-raspi5.15.0-1097.100UBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-raspi6.8.0-1056.60USN-8278-1
Ubuntu:24.04:LTSlinux-raspi6.8.0-1056.60UBUNTU-CVE-2025-71182
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-71182
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-71182
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-117.117~22.04.1UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-71182
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1032.33USN-8499-1
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1032.33UBUNTU-CVE-2025-71182
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1067.71UBUNTU-CVE-2025-71182

Affected products (as reported)

VendorProductVersions
Linux Linux 9d71dd0c70099914fcd063135da3c580865e924c – before ebb0dfd718dd31c8d3600612ca4b7207ec3d923a9d71dd0c70099914fcd063135da3c580865e924c – before c3a4316e3c746af415c0fd6c6d489ad13f53714d9d71dd0c70099914fcd063135da3c580865e924c – before 46ca9dc978923c5e1247a9e9519240ba7ace413c9d71dd0c70099914fcd063135da3c580865e924c – before 78d87b72cebe2a993fd5b017e9f14fb6278f2eae9d71dd0c70099914fcd063135da3c580865e924c – before ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb35369d71dd0c70099914fcd063135da3c580865e924c – before 79dd3f1d9dd310c2af89b09c71f34d93973b200f9d71dd0c70099914fcd063135da3c580865e924c – before 5d5602236f5db19e8b337a2cd87a90ace5ea776d
Linux Linux 5.4

Weakness: CWE-362

References