Memory leak in Linux kernel - CVE-2025-71186

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU122207

Memory leak in Linux kernel - CVE-2025-71186

Published: February 2, 2026


Vulnerability identifier: #VU122207
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-71186
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the stm32_dmamux_route_allocate() function in drivers/dma/stm32-dmamux.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Debian Linux
Ubuntu
openEuler
linux (Ubuntu package)
linux-fips (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-azure (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-ibm (Ubuntu package)
linux-raspi (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux (Debian package)
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-headers
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo
kernel-extra-modules
linux-nvidia (Ubuntu package)
linux-nvidia-6.8 (Ubuntu package)
linux-azure-fde-6.17 (Ubuntu package)
linux-gcp-6.17 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-azure-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)

How to mitigate CVE-2025-71186

Install update from vendor's repository.

linux (Ubuntu package) - addressed in versions 5.15.0.175.148, 5.15.0-175.185, 5.15.0-175.185~20.04.1, 5.15.0.176.161, 5.15.0-176.186, 5.15.0.1088.87, 5.15.0-1088.96, 5.15.0.1100.100, 5.15.0-1100.101, 5.15.0.1101.100, 5.15.0-1101.107~20.04.1, 5.15.0.1102.98, 5.15.0-1102.108, 5.15.0.1105.101, 5.15.0.1105.108, 5.15.0-1105.112, 5.15.0-1105.112~20.04.1, 5.15.0-1105.114, 6.8.0-117.117, 6.8.0-117.117.1, 6.8.0-117.117.1~22.04.1, 6.8.0-1041.44, 6.8.0-1054.60, 6.8.0-1055.56, 6.8.0-1055.56~22.04.1, 6.8.0-1055.58+fips1, 6.8.0-1056.60, 6.8.0-1058.61, 6.8.0-1058.61+fips1, 6.8.0-2045.46, 6.8.1-1051.52, 6.8.1-1051.52~22.04.1
linux-fips (Ubuntu package) - addressed in versions 5.15.0.176.102, 5.15.0-176.186+fips1, 5.15.0.1105.95, 5.15.0-1105.114+fips1, 6.8.0-116.116+fips1
linux-hwe-5.15 (Ubuntu package) - update to 5.15.0-176.186~20.04.1
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1046.46+1, 5.15.0.1046.48, 5.15.0-1057.57, 6.8.0-1024.24
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1057.57~20.04.1
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.15.0.1070.73, 5.15.0-1070.74
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1097.93, 5.15.0-1097.102, 5.15.0.1100.99, 5.15.0-1100.106, 5.15.0-1100.106~20.04.1, 5.15.0-1102.108~20.04.1, 5.15.0.1110.108, 5.15.0-1110.119, 6.8.0-1056.62
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1097.99, 5.15.0.1097.101, 5.15.0.1104.108, 5.15.0-1104.113
linux-ibm (Ubuntu package) - addressed in versions 5.15.0.1099.95, 5.15.0-1099.102, 5.15.0-1099.102~20.04.1
linux-raspi (Ubuntu package) - addressed in versions 5.15.0.1099.97, 5.15.0-1099.102
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1110.95, 5.15.0-1110.119+fips1
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1110.119~20.04.1
linux (Debian package) - addressed in versions 6.1.162-1, 6.12.69-1
kernel - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
bpftool - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
bpftool-debuginfo - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-debuginfo - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-debugsource - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-devel - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-headers - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-source - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-tools - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-tools-debuginfo - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-tools-devel - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
perf - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
perf-debuginfo - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
python3-perf - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
python3-perf-debuginfo - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-extra-modules - update to 6.6.0-142.0.0.137
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1054.57, 6.8.0-1054.57.1
linux-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1054.57~22.04.1
linux-azure-fde-6.17 (Ubuntu package) - update to 6.17.0-1018.18~24.04.1
linux-gcp-6.17 (Ubuntu package) - addressed in versions 6.17.0-1018.20~24.04.1, 6.17.0-1021.24~24.04.1
linux-oracle-6.17 (Ubuntu package) - addressed in versions 6.17.0-1019.19~24.04.3, 6.17.0-1019.19~24.04.3+1
linux-azure-6.17 (Ubuntu package) - update to 6.17.0-1021.21~24.04.1
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1030.30

External References

Related Security Bulletins