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Unscored CVE-2023-53995 EUVD-2025-205164GHSA-2cq7-86qp-4xjx

net: ipv4: fix one memleak in __inet_del_ifa()

Published Dec 24, 2025 · Updated May 11, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.4 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-fips Package: linux-aws-hwe Package: linux-azure Package: linux-azure-4.15 Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.4 Package: linux-azure-5.8 Package: linux-azure-6.11 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-4.15 Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.4 Package: linux-gcp-5.8 Package: linux-gcp-6.11 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.4 Package: linux-hwe-5.8 Package: linux-hwe-6.11 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-5.4 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-iot Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.11 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lts-xenial Package: linux-nvidia Package: linux-nvidia-6.11 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-tegra Package: linux-nvidia-tegra-5.15 Package: linux-nvidia-tegra-igx Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.11 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.4 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.14 Package: linux-riscv-6.5 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

In the Linux kernel, the following vulnerability has been resolved:

net: ipv4: fix one memleak in __inet_del_ifa()

I got the below warning when do fuzzing test:
unregister_netdevice: waiting for bond0 to become free. Usage count = 2

It can be repoduced via:

ip link add bond0 type bond
sysctl -w net.ipv4.conf.bond0.promote_secondaries=1
ip addr add 4.117.174.103/0 scope 0x40 dev bond0
ip addr add 192.168.100.111/255.255.255.254 scope 0 dev bond0
ip addr add 0.0.0.4/0 scope 0x40 secondary dev bond0
ip addr del 4.117.174.103/0 scope 0x40 dev bond0
ip link delete bond0 type bond

In this reproduction test case, an incorrect 'last_prim' is found in
__inet_del_ifa(), as a result, the secondary address(0.0.0.4/0 scope 0x40)
is lost. The memory of the secondary address is leaked and the reference of
in_device and net_device is leaked.

Fix this problem:
Look for 'last_prim' starting at location of the deleted IP and inserting
the promoted IP into the location of 'last_prim'.

Affected products

VendorProductAffectedFixed
Linux Linux 2.6.15 5.4.257

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.5.6-1 —
Debian 13 linux 6.5.6-1 —
Debian 12 linux 6.1.55-1 —
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1035.37 —
Ubuntu 24.04 LTS linux-riscv +10 No fix yet —
Ubuntu 22.04 LTS linux +1 5.15.0-94.104 —
Ubuntu 22.04 LTS linux-aws 5.15.0-1053.58 —
Ubuntu 22.04 LTS linux-azure 5.15.0-1056.64 —
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1056.64.1 —
Ubuntu 22.04 LTS linux-gcp 5.15.0-1051.59 —
Ubuntu 22.04 LTS linux-gke +1 5.15.0-1050.55 —
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1036.42 —
Ubuntu 22.04 LTS linux-ibm +1 5.15.0-1046.49 —
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1047.53 —
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1044.44 —
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1022.22 —
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1009.9 —
Ubuntu 22.04 LTS linux-oracle 5.15.0-1051.57 —
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1027.31 —
Ubuntu 20.04 LTS linux 5.4.0-169.187 —
Ubuntu 20.04 LTS linux-aws 5.4.0-1116.126 —
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1053.58~20.04.1 —
Ubuntu 20.04 LTS linux-azure 5.4.0-1121.128 —
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1056.64~20.04.1 —
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1076.82 —
Ubuntu 20.04 LTS linux-gcp 5.4.0-1120.129 —
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1051.59~20.04.1 —
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-94.104~20.04.1 —
Ubuntu 20.04 LTS linux-ibm 5.4.0-1063.68 —
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1046.49~20.04.1 —
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1048.54~20.04.1 —
Ubuntu 20.04 LTS linux-iot 5.4.0-1028.29 —
Ubuntu 20.04 LTS linux-kvm 5.4.0-1104.111 —
Ubuntu 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1022.22~20.04.1 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1115.124 —
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1051.57~20.04.1 —
Ubuntu 20.04 LTS linux-raspi 5.4.0-1100.112 —
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1049.53~20.04.2 —
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1035.39 —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Show 13 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1046.48 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1054.60 —
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 18.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 16.04 LTS linux-fips No fix yet —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1053.58+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-94.104+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1055.63+fips2 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1116.126+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1121.128+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1090.100 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1120.129+fips1 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS-updates 16.04 LTS linux-fips No fix yet —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro 18.04 LTS linux +5 No fix yet —
Ubuntu Pro 18.04 LTS linux-aws-5.4 5.4.0-1116.126~18.04.1 —
Ubuntu Pro 18.04 LTS linux-azure-5.4 5.4.0-1121.128~18.04.1 —
Ubuntu Pro 18.04 LTS linux-gcp-5.4 5.4.0-1120.129~18.04.1 —
Ubuntu Pro 18.04 LTS linux-hwe-5.4 5.4.0-169.187~18.04.1 —
Ubuntu Pro 18.04 LTS linux-ibm-5.4 5.4.0-1063.68~18.04.1 —
Ubuntu Pro 18.04 LTS linux-oracle-5.4 5.4.0-1115.124~18.04.1 —
Ubuntu Pro 18.04 LTS linux-raspi-5.4 5.4.0-1100.112~18.04.1 —
Ubuntu Pro 16.04 LTS linux +7 No fix yet —
Ubuntu Pro 14.04 LTS linux +3 No fix yet —
ReleasePackageFixed inAdvisory
RHEL 9 bpftool 7.3.0-427.13.1.el9_4 RHSA-2024:2394
RHEL 9 rv +64 5.14.0-427.13.1.el9_4 RHSA-2024:2394
RHEL 8 perf +26 4.18.0-553.el8_10 RHSA-2024:3138

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 kernel 4.18.0-553.123.1.el8_10.cloud.0.1 RXSA-2024:3138
ReleasePackageFixed inAdvisory
SLES 15 SP7 kernel-64kb +6 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1
SLES 15 SP7 kernel-azure +2 6.4.0-150700.20.24.1 SUSE-SU-2026:0281-1
SLES 15 SP7 kernel-default-base 6.4.0-150700.53.28.1.150700.17.19.1 SUSE-SU-2026:0315-1
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.84.1.150600.12.38.1 SUSE-SU-2026:0293-1
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.182.1 SUSE-SU-2026:3595-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.182.1.150500.6.85.2 SUSE-SU-2026:3595-1
SLES 15 SP4 kernel-64kb +6 5.14.21-150400.24.235.1 SUSE-SU-2026:3593-1
SLES 15 SP4 kernel-default-base 5.14.21-150400.24.235.1.150400.24.118.3 SUSE-SU-2026:3593-1
SLES 12 SP5 kernel-syms +2 4.12.14-122.320.1 SUSE-SU-2026:2914-1
Show 17 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES 11 SP4 kernel-ec2 +6 3.0.101-108.216.1 SUSE-SU-2026:3809-1
SLES for SAP 15 SP6 kernel-default-base 6.4.0-150600.23.84.1.150600.12.38.1 SUSE-SU-2026:0293-1
SLES for SAP 15 SP6 kernel-docs +4 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1
SLES for SAP 15 SP5 kernel-default-base 5.14.21-150500.55.182.1.150500.6.85.2 SUSE-SU-2026:3595-1
SLES for SAP 15 SP5 kernel-docs +4 5.14.21-150500.55.182.1 SUSE-SU-2026:3595-1
SLES for SAP 15 SP4 kernel-default-base 5.14.21-150400.24.235.1.150400.24.118.3 SUSE-SU-2026:3593-1
SLES for SAP 15 SP4 kernel-docs +4 5.14.21-150400.24.235.1 SUSE-SU-2026:3593-1
SLE Micro 6.1 kernel-default-base 6.4.0-39.1.21.16 SUSE-SU-2026:20498-1
SLE Micro 6.1 kernel-rt +1 6.4.0-40.1 SUSE-SU-2026:20876-1
SLE Micro 6.1 kernel-source +2 6.4.0-39.1 SUSE-SU-2026:20498-1
SLE Micro 6.0 kernel-default-base 6.4.0-39.1.21.16 SUSE-SU-2026:20477-1
SLE Micro 6.0 kernel-rt +1 6.4.0-40.1 SUSE-SU-2026:20845-1
SLE Micro 6.0 kernel-source +2 6.4.0-39.1 SUSE-SU-2026:20477-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.182.1.150500.6.85.2 SUSE-SU-2026:3595-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.156.1 SUSE-SU-2026:3617-1
SLE Micro 5.5 kernel-source +1 5.14.21-150500.55.182.1 SUSE-SU-2026:3595-1
SLE Micro 5.4 kernel-default-base 5.14.21-150400.24.235.1.150400.24.118.3 SUSE-SU-2026:3593-1
SLE Micro 5.4 kernel-rt +1 5.14.21-150400.15.181.1 SUSE-SU-2026:3616-1
SLE Micro 5.4 kernel-source +1 5.14.21-150400.24.235.1 SUSE-SU-2026:3593-1
SLE Micro 5.3 kernel-default-base 5.14.21-150400.24.235.1.150400.24.118.3 SUSE-SU-2026:3593-1
SLE Micro 5.3 kernel-rt +1 5.14.21-150400.15.181.1 SUSE-SU-2026:3616-1
SLE Micro 5.3 kernel-source +1 5.14.21-150400.24.235.1 SUSE-SU-2026:3593-1
SLE Live Patching 15 SP7 kernel-default 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7-RT_Update_8 1-150700.1.3.1 SUSE-SU-2026:0278-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7_Update_8 1-150700.15.3.1 SUSE-SU-2026:0315-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_19 1-150600.13.3.1 SUSE-SU-2026:0293-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.182.1 SUSE-SU-2026:3595-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_29 20-150500.2.1 SUSE-SU-2026:3739-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_30 17-150500.2.1 SUSE-SU-2026:3703-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_32 +1 12-150500.2.1 SUSE-SU-2026:3710-1, SUSE-SU-2026:3708-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_36 8-150500.2.1 SUSE-SU-2026:3724-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_38 7-150500.2.1 SUSE-SU-2026:3744-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_39 6-150500.2.1 SUSE-SU-2026:3715-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_40 +2 4-150500.2.1 SUSE-SU-2026:3759-1, SUSE-SU-2026:3729-1, SUSE-SU-2026:3717-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_43 2-150500.2.1 SUSE-SU-2026:3807-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_44 1-150500.11.5.1 SUSE-SU-2026:3595-1
SLE Live Patching 15 SP4 kernel-default 5.14.21-150400.24.235.1 SUSE-SU-2026:3593-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_42 22-150400.2.1 SUSE-SU-2026:3707-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_43 19-150400.2.1 SUSE-SU-2026:3728-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_45 16-150400.2.1 SUSE-SU-2026:3702-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_46 12-150400.2.1 SUSE-SU-2026:3756-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_48 10-150400.2.1 SUSE-SU-2026:3750-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_49 +1 8-150400.2.1 SUSE-SU-2026:3766-1, SUSE-SU-2026:3722-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_52 6-150400.2.1 SUSE-SU-2026:3709-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_53 5-150400.2.1 SUSE-SU-2026:3747-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_54 +2 4-150400.2.1 SUSE-SU-2026:3757-1, SUSE-SU-2026:3734-1, SUSE-SU-2026:3721-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_57 2-150400.2.1 SUSE-SU-2026:3829-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_58 1-150400.9.7.1 SUSE-SU-2026:3593-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.320.1 SUSE-SU-2026:2914-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_71 17-2.1 SUSE-SU-2026:3706-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_72 16-2.1 SUSE-SU-2026:3723-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_75 +1 12-2.1 SUSE-SU-2026:3743-1, SUSE-SU-2026:3740-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_79 8-2.1 SUSE-SU-2026:3826-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_83 5-2.1 SUSE-SU-2026:3749-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_84 3-2.1 SUSE-SU-2026:3808-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_85 1-8.3.1 SUSE-SU-2026:2914-1
SLE HPC 15 SP5 kernel-64kb +5 5.14.21-150500.55.182.1 SUSE-SU-2026:3595-1
SLE HPC 15 SP5 kernel-default-base 5.14.21-150500.55.182.1.150500.6.85.2 SUSE-SU-2026:3595-1
SLE HPC 15 SP4 kernel-64kb +5 5.14.21-150400.24.235.1 SUSE-SU-2026:3593-1
SLE HPC 15 SP4 kernel-default-base 5.14.21-150400.24.235.1.150400.24.118.3 SUSE-SU-2026:3593-1
SUSE Real Time Module 15 SP7 kernel-rt +2 6.4.0-150700.7.28.1 SUSE-SU-2026:0278-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.84.1.150600.12.38.1 SUSE-SU-2026:0293-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.55-75.123 1.0-0.amzn2023 ALAS2023-2023-356
Amazon Linux 2023 perf +12 6.1.55-75.123.amzn2023 ALAS2023-2023-356

Advisories 50

References