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Vulnerability · Published May 20, 2025 · Assigned by Linux

CVE-2025-37926ksmbd: fix use-after-free in ksmbd_session_rpc_open

High 8.8

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 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.6%top 52.7% 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: ksmbd: fix use-after-free in ksmbd_session_rpc_open A UAF issue can occur due to a race condition between ksmbd_session_rpc_open() and __session_rpc_close(). Add rpc_lock to the session to protect it.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.162-1DSA-6127-1
Debian:12linux6.1.162-1DEBIAN-CVE-2025-37926
Debian:13linux6.12.29-1DEBIAN-CVE-2025-37926
Debian:14linux6.12.29-1DEBIAN-CVE-2025-37926
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux6.8.0-117.117UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux6.8.0-117.117USN-8278-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-aws6.8.0-1055.58USN-8278-1
Ubuntu:24.04:LTSlinux-aws6.8.0-1055.58UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-aws-6.146.14.0-1009.9~24.04.1UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-aws-6.146.14.0-1009.9~24.04.1USN-7665-2
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1057.60~22.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-azure6.8.0-1056.62UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-azure6.8.0-1056.62USN-8278-2
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1059.65~22.04.1USN-8440-1
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1059.65~22.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1058.65UBUNTU-CVE-2025-37926
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1058.65~22.04.1UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-gcp6.8.0-1058.61UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-gcp6.8.0-1058.61USN-8278-1
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-gcp-6.146.14.0-1011.11~24.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1060.63~22.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-gke6.8.0-1054.60UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-gke6.8.0-1054.60USN-8278-1
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1041.44USN-8278-1
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1041.44UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-124.124~22.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-ibm6.8.0-1055.56USN-8278-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1055.56UBUNTU-CVE-2025-37926
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-2025-37926
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-117.117.1USN-8278-1
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-117.117.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-117.117.1~22.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-117.117.1~22.04.1USN-8278-1
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1054.57UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1054.57USN-8289-1
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1054.57~22.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1054.57~22.04.1USN-8289-2
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1054.57.1USN-8289-1
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1054.57.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1024.24UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1024.24USN-8296-2
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-oem-6.146.14.0-1007.7UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-oem-6.146.14.0-1007.7USN-7650-1
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-oracle6.8.0-1054.55UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-oracle-6.146.14.0-1009.9~24.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1054.55~22.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-raspi6.8.0-1056.60UBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-raspi6.8.0-1056.60USN-8278-1
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-riscv-6.146.14.0-24.24.1~24.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-117.117~22.04.1UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-37926
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1032.33USN-8499-1
Ubuntu:24.04:LTSlinux-xilinx6.8.0-1032.33UBUNTU-CVE-2025-37926
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2025-37926

Affected products (as reported)

VendorProductVersions
Linux Linux 0626e6641f6b467447c81dd7678a69c66f7746cf – before a4348710a7267705b75692dc1a000920481d1d920626e6641f6b467447c81dd7678a69c66f7746cf – before 1067361a1cc6ad9cdf7acfc47f90012b72ad15020626e6641f6b467447c81dd7678a69c66f7746cf – before 8fb3b6c85b7e3127161623586b62abcc366caa200626e6641f6b467447c81dd7678a69c66f7746cf – before 6323fec65fe54b365961fed260dd579191e461210626e6641f6b467447c81dd7678a69c66f7746cf – before a1f46c99d9ea411f9bf30025b912d881d36fc709
Linux Linux 5.15

References