Use-after-free in Linux kernel - CVE-2026-31419

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Main Vulnerability Database Vulnerabilities #VU125859

Use-after-free in Linux kernel - CVE-2026-31419

Published: April 14, 2026


Vulnerability identifier: #VU125859
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-2026-31419
CWE-ID: CWE-416
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 a use-after-free in bond_xmit_broadcast() when transmitting broadcast packets during concurrent slave enslave or release operations. A local user can trigger concurrent network interface state changes and packet transmission to cause a denial of service.

The issue arises because the determination of the last slave can change during RCU-protected iteration, leading to double consumption and double free of the original skb.


Affected software

Linux kernel
Debian Linux
Red Hat Enterprise Linux for Real Time for NFV
Anolis OS
Red Hat Enterprise Linux for Real Time
Red Hat CodeReady Linux Builder for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Ubuntu
openEuler
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kpatch-patch-4_18_0-553_125_1 (Red Hat package)
kpatch-patch-5_14_0-284_172_1 (Red Hat package)
kpatch-patch-5_14_0-427_126_1 (Red Hat package)
kpatch-patch-5_14_0-570_116_1 (Red Hat package)
kpatch-patch-5_14_0-687_10_1 (Red Hat package)
kpatch-patch-6_12_0-211_16_1 (Red Hat package)
kpatch-patch-4_18_0-477_130_1 (Red Hat package)
kpatch-patch-4_18_0-553_109_1 (Red Hat package)
kpatch-patch-5_14_0-284_158_1 (Red Hat package)
kpatch-patch-5_14_0-427_113_1 (Red Hat package)
kpatch-patch-5_14_0-570_94_1 (Red Hat package)
kpatch-patch-4_18_0-477_120_1 (Red Hat package)
kpatch-patch-4_18_0-553_85_1 (Red Hat package)
kpatch-patch-5_14_0-284_148_1 (Red Hat package)
kpatch-patch-5_14_0-427_100_1 (Red Hat package)
kpatch-patch-5_14_0-570_66_1 (Red Hat package)
kpatch-patch-4_18_0-477_107_1 (Red Hat package)
kpatch-patch-5_14_0-570_39_1 (Red Hat package)
kpatch-patch-4_18_0-553_72_1 (Red Hat package)
kpatch-patch-5_14_0-284_134_1 (Red Hat package)
kpatch-patch-5_14_0-427_84_1 (Red Hat package)
kpatch-patch-4_18_0-477_97_1 (Red Hat package)
kpatch-patch-4_18_0-553_53_1 (Red Hat package)
kpatch-patch-5_14_0-427_68_2 (Red Hat package)
kpatch-patch-5_14_0-284_117_1 (Red Hat package)
kpatch-patch-5_14_0-570_17_1 (Red Hat package)
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-debug-modules-extra
kernel-abi-stablelists
kernel-doc
python3-perf
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-modules-extra
kernel-modules
kernel-headers
kernel-devel
kernel-debug-modules
kernel-debug-devel
kernel-debug-core
kernel-debug
kernel-cross-headers
kernel-core
kernel
bpftool
bpftool-debuginfo
kernel-debugsource
kernel-tools-debuginfo
kernel-tools-devel
perf-debuginfo
python3-perf-debuginfo
kernel-source
kernel-debuginfo
linux (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-lowlatency-hwe-5.15 (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-azure (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-6.8 (Ubuntu package)
kernel-devel (Red Hat package)
kernel-debuginfo-common-s390x (Red Hat package)
kernel-debug-devel-matched (Red Hat package)
kernel-debuginfo-common-x86_64 (Red Hat package)
kernel-devel-matched (Red Hat package)
kernel-headers (Red Hat package)
kernel-tools-debuginfo (Red Hat package)
perf (Red Hat package)
python3-perf (Red Hat package)
rtla (Red Hat package)
rv (Red Hat package)
kernel-debug-debuginfo (Red Hat package)
kernel-debuginfo (Red Hat package)
kernel-zfcpdump-devel (Red Hat package)
kernel-zfcpdump-devel-matched (Red Hat package)
kernel-debuginfo-common-ppc64le (Red Hat package)
kernel-64k-debug-debuginfo (Red Hat package)
kernel-64k-debug-devel (Red Hat package)
kernel-64k-debug-devel-matched (Red Hat package)
kernel-64k-debuginfo (Red Hat package)
kernel-64k-devel (Red Hat package)
kernel-64k-devel-matched (Red Hat package)
kernel-debuginfo-common-aarch64 (Red Hat package)
kernel-debug-devel (Red Hat package)
linux (Debian package)
linux-oracle-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)

How to mitigate CVE-2026-31419

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kpatch-patch-4_18_0-553_125_1 (Red Hat package) - update to 1-3.el8_10
kpatch-patch-5_14_0-284_172_1 (Red Hat package) - update to 1-3.el9_2
kpatch-patch-5_14_0-427_126_1 (Red Hat package) - update to 1-3.el9_4
kpatch-patch-5_14_0-570_116_1 (Red Hat package) - update to 1-3.el9_6
kpatch-patch-5_14_0-687_10_1 (Red Hat package) - update to 1-3.el9_8
kpatch-patch-6_12_0-211_16_1 (Red Hat package) - update to 1-3.el10_2
kpatch-patch-4_18_0-477_130_1 (Red Hat package) - update to 1-6.el8_8
kpatch-patch-4_18_0-553_109_1 (Red Hat package) - update to 1-6.el8_10
kpatch-patch-5_14_0-284_158_1 (Red Hat package) - update to 1-6.el9_2
kpatch-patch-5_14_0-427_113_1 (Red Hat package) - update to 1-6.el9_4
kpatch-patch-5_14_0-570_94_1 (Red Hat package) - update to 1-6.el9_6
kpatch-patch-4_18_0-477_120_1 (Red Hat package) - update to 1-8.el8_8
kpatch-patch-4_18_0-553_85_1 (Red Hat package) - update to 1-8.el8_10
kpatch-patch-5_14_0-284_148_1 (Red Hat package) - update to 1-8.el9_2
kpatch-patch-5_14_0-427_100_1 (Red Hat package) - update to 1-8.el9_4
kpatch-patch-5_14_0-570_66_1 (Red Hat package) - update to 1-8.el9_6
kpatch-patch-4_18_0-477_107_1 (Red Hat package) - update to 1-9.el8_8
kpatch-patch-5_14_0-570_39_1 (Red Hat package) - update to 1-9.el9_6
kpatch-patch-4_18_0-553_72_1 (Red Hat package) - update to 1-10.el8_10
kpatch-patch-5_14_0-284_134_1 (Red Hat package) - update to 1-10.el9_2
kpatch-patch-5_14_0-427_84_1 (Red Hat package) - update to 1-10.el9_4
kpatch-patch-4_18_0-477_97_1 (Red Hat package) - update to 1-13.el8_8
kpatch-patch-4_18_0-553_53_1 (Red Hat package) - update to 1-13.el8_10
kpatch-patch-5_14_0-427_68_2 (Red Hat package) - update to 1-15.el9_4
kpatch-patch-5_14_0-284_117_1 (Red Hat package) - update to 1-16.el9_2
kpatch-patch-5_14_0-570_17_1 (Red Hat package) - update to 1-18.el9_6
kernel (Red Hat package) - addressed in versions 4.18.0-477.143.1.el8_8, 4.18.0-553.136.1.el8_10, 5.14.0-284.174.1.el9_2, 5.14.0-427.127.1.el9_4, 5.14.0-687.15.1.el9_8, 6.12.0-124.55.1.el10_1, 6.12.0-211.22.1.el10_2
kernel-rt (Red Hat package) - addressed in versions 4.18.0-553.136.1.rt7.477.el8_10, 5.14.0-284.174.1.rt14.459.el9_2
kernel-debug-modules-extra - update to 4.18.0-553.137.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.137.1.0.1
kernel-doc - update to 4.18.0-553.137.1.0.1
python3-perf - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
perf - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
kernel-tools-libs-devel - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
kernel-tools-libs - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
kernel-tools - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
kernel-modules-extra - update to 4.18.0-553.137.1.0.1
kernel-modules - update to 4.18.0-553.137.1.0.1
kernel-headers - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
kernel-devel - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
kernel-debug-modules - update to 4.18.0-553.137.1.0.1
kernel-debug-devel - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
kernel-debug-core - update to 4.18.0-553.137.1.0.1
kernel-debug - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
kernel-cross-headers - update to 4.18.0-553.137.1.0.1
kernel-core - update to 4.18.0-553.137.1.0.1
kernel - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
bpftool - addressed in versions 4.18.0-553.137.1.0.1, 6.6.102-7
bpftool-debuginfo - update to 5.10.0-314.0.0.217
kernel - update to 5.10.0-314.0.0.217
kernel-debugsource - update to 5.10.0-314.0.0.217
bpftool - update to 5.10.0-314.0.0.217
kernel-tools-debuginfo - update to 5.10.0-314.0.0.217
kernel-tools-devel - update to 5.10.0-314.0.0.217
perf - update to 5.10.0-314.0.0.217
perf-debuginfo - update to 5.10.0-314.0.0.217
python3-perf - update to 5.10.0-314.0.0.217
python3-perf-debuginfo - update to 5.10.0-314.0.0.217
kernel-tools - update to 5.10.0-314.0.0.217
kernel-source - update to 5.10.0-314.0.0.217
kernel-headers - update to 5.10.0-314.0.0.217
kernel-devel - update to 5.10.0-314.0.0.217
kernel-debuginfo - update to 5.10.0-314.0.0.217
linux (Ubuntu package) - addressed in versions 5.15.0.179.105, 5.15.0.179.163, 5.15.0-179.189+fips1, 5.15.0-179.189~20.04.1, 5.15.0-1060.60, 5.15.0-1060.60~20.04.1, 5.15.0.1091.90, 5.15.0-1091.99, 5.15.0.1100.96, 5.15.0-1100.105, 5.15.0.1102.98, 5.15.0.1102.100, 5.15.0-1102.105, 5.15.0-1102.105~20.04.1, 5.15.0.1103.102, 5.15.0.1103.103, 5.15.0-1103.104, 5.15.0-1103.109, 5.15.0-1103.109~20.04.1, 5.15.0.1104.103, 5.15.0-1104.110, 5.15.0.1105.101, 5.15.0-1105.111, 5.15.0.1107.111, 5.15.0-1107.116, 5.15.0.1108.98, 5.15.0.1108.104, 5.15.0.1108.111, 5.15.0-1108.115, 5.15.0-1108.115+fips1, 5.15.0-1108.115~20.04.1, 5.15.0-1108.117, 5.15.0-1108.117+fips1, 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, 6.17.0-29.29, 6.17.0-29.29~24.04.1, 6.17.0-1013.15, 6.17.0-1013.15~24.04.1, 6.17.0-1014.14, 6.17.0-1015.15, 6.17.0-1017.17, 6.17.0-1023.23
linux-lowlatency (Ubuntu package) - addressed in versions 5.15.0.179.151, 5.15.0-179.189
linux-lowlatency-hwe-5.15 (Ubuntu package) - update to 5.15.0-179.189~20.04.1
linux-nvidia-tegra-igx (Ubuntu package) - addressed in versions 5.15.0-1049.49, 5.15.0.1049.51
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.15.0.1074.77, 5.15.0-1074.78
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1100.102, 5.15.0.1100.104
linux-azure-5.15 (Ubuntu package) - addressed in versions 5.15.0.1114.99, 5.15.0-1114.123+fips1, 5.15.0-1114.123~20.04.1
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1114.112, 5.15.0-1114.123, 6.8.0-1056.62, 6.17.0-1015.15, 6.17.0-1015.15~24.04.1
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1025.25
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
kernel-devel (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-debuginfo-common-s390x (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-debug-devel-matched (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-debuginfo-common-x86_64 (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-devel-matched (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-headers (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-tools-debuginfo (Red Hat package) - update to 6.12.0-55.76.1.el10_0
perf (Red Hat package) - update to 6.12.0-55.76.1.el10_0
python3-perf (Red Hat package) - update to 6.12.0-55.76.1.el10_0
rtla (Red Hat package) - update to 6.12.0-55.76.1.el10_0
rv (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-debug-debuginfo (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-debuginfo (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-zfcpdump-devel (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-zfcpdump-devel-matched (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-debuginfo-common-ppc64le (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-64k-debug-debuginfo (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-64k-debug-devel (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-64k-debug-devel-matched (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-64k-debuginfo (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-64k-devel (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-64k-devel-matched (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-debuginfo-common-aarch64 (Red Hat package) - update to 6.12.0-55.76.1.el10_0
kernel-debug-devel (Red Hat package) - update to 6.12.0-55.76.1.el10_0
linux (Debian package) - addressed in versions 6.12.86-1, 6.12.95-1
linux-oracle-6.17 (Ubuntu package) - update to 6.17.0-1014.14~24.04.1
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1026.26

External References

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