Improper resource shutdown or release in Linux kernel - CVE-2026-46158

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Main Vulnerability Database Vulnerabilities #VU133034

Improper resource shutdown or release in Linux kernel - CVE-2026-46158

Published: May 29, 2026


Vulnerability identifier: #VU133034
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-2026-46158
CWE-ID: CWE-404
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource shutdown or release in the mptcp path manager ADD_ADDR retransmission handling when retransmitting ADD_ADDR messages. A local user can trigger ADD_ADDR retransmissions to cause a denial of service.


Affected software

Linux kernel
Debian Linux
Ubuntu
openEuler
linux (Ubuntu package)
linux-kvm (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure (Ubuntu package)
linux-oracle (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-gke (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-lowlatency-hwe-5.15 (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-fips (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-realtime (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-gkeop (Ubuntu package)
linux-azure-fde-5.15 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-ibm-5.15 (Ubuntu package)
linux-ibm (Ubuntu package)
linux-intel-iotg-5.15 (Ubuntu package)
linux-oracle-5.15 (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-azure-fde (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-raspi (Ubuntu package)
linux-lowlatency-hwe-6.8 (Ubuntu package)
linux-azure-fde-6.8 (Ubuntu package)
linux-azure-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-nvidia-lowlatency (Ubuntu package)
linux-nvidia-6.8 (Ubuntu package)
linux-ibm-6.8 (Ubuntu package)
linux-xilinx (Ubuntu package)
linux-gcp-6.8 (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime-6.8 (Ubuntu package)
linux-nvidia-bos (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-oracle-7.0 (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-nvidia-7.0 (Ubuntu package)
kernel-debugsource
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel
python3-perf-debuginfo
linux (Debian package)

How to mitigate CVE-2026-46158

Install security update from vendor's repository.

linux (Ubuntu package) - addressed in versions 5.15.0-202.212, 6.8.0-139.139, 7.0.0-28.28
linux-kvm (Ubuntu package) - update to 5.15.0-1111.116
linux-aws (Ubuntu package) - addressed in versions 5.15.0-1119.126, 6.8.0-1064.67, 7.0.0-1009.9
linux-gcp (Ubuntu package) - addressed in versions 5.15.0-1120.130, 6.8.0-1067.75, 7.0.0-1008.8
linux-azure (Ubuntu package) - addressed in versions 5.15.0-1125.134, 6.8.0-1067.75, 7.0.0-1010.10
linux-oracle (Ubuntu package) - addressed in versions 5.15.0-1116.122, 6.8.0-1061.64, 7.0.0-1008.8
linux-lowlatency (Ubuntu package) - addressed in versions 5.15.0-197.207, 6.8.0-139.139.1
linux-gke (Ubuntu package) - addressed in versions 5.15.0-1115.121, 6.8.0-1062.70, 7.0.0-1003.4
linux-aws-5.15 (Ubuntu package) - update to 5.15.0-1119.126~20.04.1
linux-lowlatency-hwe-5.15 (Ubuntu package) - update to 5.15.0-197.207~20.04.1
linux-hwe-5.15 (Ubuntu package) - update to 5.15.0-202.212~20.04.1
linux-fips (Ubuntu package) - addressed in versions 5.15.0-202.212+fips1, 6.8.0-139.139+fips1
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1125.134~20.04.1
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1070.72, 6.8.0-1035.38
linux-intel-iotg (Ubuntu package) - update to 5.15.0-1114.120
linux-realtime (Ubuntu package) - addressed in versions 5.15.0-1118.127, 6.8.1-1059.60, 7.0.0-28.28.1
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-gkeop (Ubuntu package) - addressed in versions 5.15.0-1102.110, 6.8.0-1049.53
linux-azure-fde-5.15 (Ubuntu package) - update to 5.15.0-1124.133~20.04.1
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0-1114.115, 6.8.0-1062.65, 7.0.0-1016.16
linux-ibm-5.15 (Ubuntu package) - update to 5.15.0-1113.117~20.04.1
linux-ibm (Ubuntu package) - addressed in versions 5.15.0-1113.117, 6.8.0-1064.65, 7.0.0-1010.10
linux-intel-iotg-5.15 (Ubuntu package) - update to 5.15.0-1114.120~20.04.1
linux-oracle-5.15 (Ubuntu package) - update to 5.15.0-1116.122~20.04.1
linux-gcp-5.15 (Ubuntu package) - update to 5.15.0-1120.130~20.04.1
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux-azure-fde (Ubuntu package) - addressed in versions 5.15.0-1124.133, 6.8.0-1065.72, 7.0.0-1009.9
linux-intel-iot-realtime (Ubuntu package) - update to 5.15.0-1111.115
linux-gcp-fips (Ubuntu package) - addressed in versions 5.15.0-1120.130+fips1, 6.8.0-1067.75+fips1
linux-aws-fips (Ubuntu package) - addressed in versions 5.15.0-1119.126+fips1, 6.8.0-1064.67+fips1
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0-1125.134+fips1, 6.8.0-1067.75+fips1
linux-raspi (Ubuntu package) - addressed in versions 6.8.0-1064.68, 7.0.0-1015.15
linux-lowlatency-hwe-6.8 (Ubuntu package) - update to 6.8.0-139.139.1~22.04.1
linux-azure-fde-6.8 (Ubuntu package) - update to 6.8.0-1065.72~22.04.1
linux-azure-6.8 (Ubuntu package) - update to 6.8.0-1067.75~22.04.1
linux-aws-6.8 (Ubuntu package) - update to 6.8.0-1064.67~22.04.1
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1061.64~22.04.1
linux-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1062.65.1
linux-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1062.65~22.04.1
linux-ibm-6.8 (Ubuntu package) - update to 6.8.0-1066.67~22.04.1
linux-xilinx (Ubuntu package) - update to 6.8.0-1036.37
linux-gcp-6.8 (Ubuntu package) - update to 6.8.0-1067.75~22.04.1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2053.55
linux-realtime-6.8 (Ubuntu package) - update to 6.8.1-1059.60~22.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16
linux-azure-7.0 (Ubuntu package) - update to 7.0.0-1014.14~24.04.1
linux-oracle-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1009.9
linux-nvidia-7.0 (Ubuntu package) - update to 7.0.0-1016.16~24.04.1
kernel-debugsource - update to 6.6.0-145.1.20.157
python3-perf - update to 6.6.0-145.1.20.157
perf-debuginfo - update to 6.6.0-145.1.20.157
perf - update to 6.6.0-145.1.20.157
kernel-tools-devel - update to 6.6.0-145.1.20.157
kernel-tools-debuginfo - update to 6.6.0-145.1.20.157
kernel-tools - update to 6.6.0-145.1.20.157
kernel-source - update to 6.6.0-145.1.20.157
kernel-headers - update to 6.6.0-145.1.20.157
kernel-devel - update to 6.6.0-145.1.20.157
kernel-debuginfo - update to 6.6.0-145.1.20.157
bpftool-debuginfo - update to 6.6.0-145.1.20.157
bpftool - update to 6.6.0-145.1.20.157
kernel - update to 6.6.0-145.1.20.157
python3-perf-debuginfo - update to 6.6.0-145.1.20.157
linux (Debian package) - update to 6.12.94-1

External References

Related Security Bulletins