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OpenAdvisories
High · 7.8 Public exploit CVE-2023-52927 EUVD-2023-59682GHSA-6952-99fq-g3mw

netfilter: allow exp not to be removed in nf_ct_find_expectation

Published Mar 14, 2025 · Updated Nov 10, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 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-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-6.5 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-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-edge Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 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-6.5 Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

netfilter: allow exp not to be removed in nf_ct_find_expectation

Currently nf_conntrack_in() calling nf_ct_find_expectation() will
remove the exp from the hash table. However, in some scenario, we
expect the exp not to be removed when the created ct will not be
confirmed, like in OVS and TC conntrack in the following patches.

This patch allows exp not to be removed by setting IPS_CONFIRMED
in the status of the tmpl.

Affected products

VendorProductAffectedFixed
Linux Linux 5.18 6.1.130

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 6.6.8-1 —
Debian 13 linux 6.6.8-1 —
Debian 12 linux 6.1.133-1 DSA-5900-1
Debian 11 linux-6.1 6.1.137-1~deb11u1 DLA-4193-1
ReleasePackageFixed inAdvisory
Ubuntu 24.04 LTS linux-realtime +1 No fix yet —
Ubuntu 22.04 LTS linux +1 5.15.0-139.149 USN-7494-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1083.90 USN-7494-1
Ubuntu 22.04 LTS linux-azure 5.15.0-1088.97 USN-7494-4
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1088.97.1 USN-7494-4
Ubuntu 22.04 LTS linux-gcp 5.15.0-1082.91 USN-7494-1
Ubuntu 22.04 LTS linux-gke +1 5.15.0-1080.86 USN-7494-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1065.73 USN-7494-1
Ubuntu 22.04 LTS linux-ibm 5.15.0-1075.78 USN-7494-1
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1078.84 USN-7494-1
Ubuntu 22.04 LTS linux-kvm 5.15.0-1079.84 USN-7494-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1077.78 USN-7494-1
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1036.36 USN-7494-1
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1024.24 USN-7494-1
Ubuntu 22.04 LTS linux-raspi 5.15.0-1077.80 USN-7494-1
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1050.54 USN-7602-1
Ubuntu 20.04 LTS linux 5.4.0-215.235 USN-7495-1
Ubuntu 20.04 LTS linux-aws 5.4.0-1145.155 USN-7495-1
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1083.90~20.04.1 USN-7494-1
Ubuntu 20.04 LTS linux-azure 5.4.0-1150.157 USN-7495-3
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1088.97~20.04.1 USN-7494-4
Ubuntu 20.04 LTS linux-azure-fde-5.15 5.15.0-1088.97~20.04.1.1 USN-7494-4
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1105.112 USN-7517-3
Ubuntu 20.04 LTS linux-gcp 5.4.0-1148.157 USN-7495-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1083.92~20.04.1 USN-7512-1
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-139.149~20.04.1 USN-7494-1
Ubuntu 20.04 LTS linux-ibm 5.4.0-1091.96 USN-7495-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1075.78~20.04.1 USN-7494-1
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1078.84~20.04.1 USN-7494-1
Ubuntu 20.04 LTS linux-kvm 5.4.0-1132.141 USN-7495-1
Ubuntu 20.04 LTS linux-oracle 5.4.0-1143.153 USN-7495-1
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1080.86~20.04.1 USN-7494-1
Ubuntu 20.04 LTS linux-raspi 5.4.0-1129.142 USN-7539-1
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1064.68 USN-7517-1
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Show 8 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1076.78 USN-7494-3
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1083.92 USN-7494-3
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1083.90+fips1 USN-7494-2
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1088.97+fips1 USN-7494-5
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-139.149+fips1 USN-7494-2
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1082.91+fips1 USN-7494-2
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1145.156+fips1 USN-7495-2
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1151.158+fips1 USN-7518-1
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1119.129 USN-7495-2
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1148.157+fips1 USN-7495-2
Ubuntu Pro FIPS-updates 18.04 LTS linux-aws-fips 4.15.0-2118.124 USN-7496-2
Ubuntu Pro FIPS-updates 18.04 LTS linux-azure-fips 4.15.0-2097.103 USN-7496-5
Ubuntu Pro FIPS-updates 18.04 LTS linux-fips 4.15.0-1135.146 USN-7496-2
Ubuntu Pro FIPS-updates 18.04 LTS linux-gcp-fips 4.15.0-2081.87 USN-7496-2
Ubuntu Pro 20.04 LTS linux-iot 5.4.0-1051.54 USN-7640-1
Ubuntu Pro 18.04 LTS linux 4.15.0-237.249 USN-7496-1
Ubuntu Pro 18.04 LTS linux-aws 4.15.0-1180.193 USN-7496-1
Ubuntu Pro 18.04 LTS linux-aws-5.4 5.4.0-1145.155~18.04.1 USN-7495-1
Ubuntu Pro 18.04 LTS linux-azure-4.15 4.15.0-1188.203 USN-7496-3
Ubuntu Pro 18.04 LTS linux-azure-5.4 5.4.0-1150.157~18.04.1 USN-7495-1
Ubuntu Pro 18.04 LTS linux-gcp-4.15 4.15.0-1173.190 USN-7496-1
Ubuntu Pro 18.04 LTS linux-gcp-5.4 5.4.0-1148.157~18.04.1 USN-7495-1
Ubuntu Pro 18.04 LTS linux-hwe-5.4 5.4.0-215.235~18.04.1 USN-7495-1
Ubuntu Pro 18.04 LTS linux-ibm-5.4 5.4.0-1092.97~18.04.1 USN-7517-2
Ubuntu Pro 18.04 LTS linux-kvm 4.15.0-1163.168 USN-7496-1
Ubuntu Pro 18.04 LTS linux-oracle 4.15.0-1142.153 USN-7496-1
Ubuntu Pro 18.04 LTS linux-oracle-5.4 5.4.0-1143.153~18.04.1 USN-7495-1
Ubuntu Pro 18.04 LTS linux-raspi-5.4 5.4.0-1129.142~18.04.1 USN-7540-1
Ubuntu Pro 16.04 LTS linux-aws-hwe 4.15.0-1180.193~16.04.1 USN-7496-1
Ubuntu Pro 16.04 LTS linux-azure 4.15.0-1188.203~16.04.1 USN-7496-3
Ubuntu Pro 16.04 LTS linux-gcp 4.15.0-1173.190~16.04.1 USN-7496-1
Ubuntu Pro 16.04 LTS linux-hwe 4.15.0-237.249~16.04.1 USN-7496-1
Ubuntu Pro 16.04 LTS linux-oracle 4.15.0-1142.153~16.04.1 USN-7496-1
Ubuntu Pro 14.04 LTS linux-azure 4.15.0-1188.203~14.04.1 USN-7496-4
ReleasePackageFixed inAdvisory
SLES 15 SP7 kernel-64kb +6 6.4.0-150700.53.3.1 SUSE-SU-2025:01951-1
SLES 15 SP7 kernel-azure +2 6.4.0-150700.20.3.1 SUSE-SU-2025:01967-1
SLES 15 SP7 kernel-default-base 6.4.0-150700.53.3.1.150700.17.2.1 SUSE-SU-2025:01951-1
SLES 15 SP6 kernel-64kb +3 6.4.0-150600.23.47.2 SUSE-SU-2025:1180-1
SLES 15 SP6 kernel-azure +1 6.4.0-150600.8.34.2 SUSE-SU-2025:1177-1
SLES 15 SP6 kernel-coco +3 6.4.0-15061.21.coco15sp6.1 SUSE-SU-2025:01919-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.47.2.150600.12.20.2 SUSE-SU-2025:1180-1
SLES 15 SP6 kernel-docs +2 6.4.0-150600.23.47.1 SUSE-SU-2025:1180-1
SLES 15 SP6 kernel-syms-azure 6.4.0-150600.8.34.1 SUSE-SU-2025:1177-1
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.116.1 SUSE-SU-2025:02588-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.116.1.150500.6.55.1 SUSE-SU-2025:02588-1
SLES 15 SP4 kernel-64kb +6 5.14.21-150400.24.173.1 SUSE-SU-2025:02849-1
SLES 15 SP4 kernel-default-base 5.14.21-150400.24.173.1.150400.24.88.1 SUSE-SU-2025:02849-1
SLES 15 SP3 kernel-64kb +7 5.3.18-150300.59.215.1 SUSE-SU-2025:02848-1
SLES 15 SP3 kernel-default-base 5.3.18-150300.59.215.1.150300.18.128.1 SUSE-SU-2025:02848-1
Show 22 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES 12 SP5 kernel-syms +2 4.12.14-122.266.1 SUSE-SU-2025:02334-1
SLES for SAP 15 SP5 kernel-default-base 5.14.21-150500.55.116.1.150500.6.55.1 SUSE-SU-2025:02588-1
SLES for SAP 15 SP5 kernel-docs +4 5.14.21-150500.55.116.1 SUSE-SU-2025:02588-1
SLES for SAP 15 SP4 kernel-default-base 5.14.21-150400.24.173.1.150400.24.88.1 SUSE-SU-2025:02849-1
SLES for SAP 15 SP4 kernel-docs +4 5.14.21-150400.24.173.1 SUSE-SU-2025:02849-1
SLE Micro 6.1 kernel-default-base 6.4.0-28.1.21.6 SUSE-SU-2025:20270-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0_Update_6 +1 1-3.1 SUSE-SU-2025:20270-1, SUSE-SU-2025:20260-1
SLE Micro 6.1 kernel-rt +4 6.4.0-28.1 SUSE-SU-2025:20270-1, SUSE-SU-2025:20260-1
SLE Micro 6.0 kernel-default-base 6.4.0-28.1.21.6 SUSE-SU-2025:20192-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_6 +1 1-3.1 SUSE-SU-2025:20192-1, SUSE-SU-2025:20190-1
SLE Micro 6.0 kernel-rt +4 6.4.0-28.1 SUSE-SU-2025:20192-1, SUSE-SU-2025:20190-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.116.1.150500.6.55.1 SUSE-SU-2025:02588-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.103.2 SUSE-SU-2025:02852-1
SLE Micro 5.5 kernel-source +1 5.14.21-150500.55.116.1 SUSE-SU-2025:02588-1
SLE Micro 5.4 kernel-default 5.14.21-150400.24.173.1 SUSE-SU-2025:02849-1
SLE Micro 5.4 kernel-default-base 5.14.21-150400.24.173.1.150400.24.88.1 SUSE-SU-2025:02849-1
SLE Micro 5.4 kernel-rt +1 5.14.21-150400.15.127.1 SUSE-SU-2025:02851-1
SLE Micro 5.3 kernel-default 5.14.21-150400.24.173.1 SUSE-SU-2025:02849-1
SLE Micro 5.3 kernel-default-base 5.14.21-150400.24.173.1.150400.24.88.1 SUSE-SU-2025:02849-1
SLE Micro 5.3 kernel-rt +1 5.14.21-150400.15.127.1 SUSE-SU-2025:02851-1
SLE Micro 5.2 kernel-default 5.3.18-150300.59.215.1 SUSE-SU-2025:02848-1
SLE Micro 5.2 kernel-default-base 5.3.18-150300.59.215.1.150300.18.128.1 SUSE-SU-2025:02848-1
SLE Micro 5.2 kernel-rt +1 5.3.18-150300.217.1 SUSE-SU-2025:02850-1
SLE Micro 5.1 kernel-default 5.3.18-150300.59.215.1 SUSE-SU-2025:02848-1
SLE Micro 5.1 kernel-default-base 5.3.18-150300.59.215.1.150300.18.128.1 SUSE-SU-2025:02848-1
SLE Micro 5.1 kernel-rt +1 5.3.18-150300.217.1 SUSE-SU-2025:02850-1
SLE Live Patching 15 SP7 kernel-default 6.4.0-150700.53.3.1 SUSE-SU-2025:01951-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7_Update_1 1-150700.15.3.1 SUSE-SU-2025:01951-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.47.2 SUSE-SU-2025:1180-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_10 1-150600.1.5.1 SUSE-SU-2025:1178-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_10 1-150600.13.5.1 SUSE-SU-2025:1180-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.116.1 SUSE-SU-2025:02588-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_29 1-150500.11.3.1 SUSE-SU-2025:02588-1
SLE Live Patching 15 SP4 kernel-default 5.14.21-150400.24.173.1 SUSE-SU-2025:02849-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_43 1-150400.9.3.1 SUSE-SU-2025:02849-1
SLE Live Patching 15 SP3 kernel-default 5.3.18-150300.59.215.1 SUSE-SU-2025:02848-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_60 1-150300.7.3.1 SUSE-SU-2025:02848-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.266.1 SUSE-SU-2025:02334-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_70 1-8.5.1 SUSE-SU-2025:02334-1
SLE HPC 15 SP5 kernel-64kb +5 5.14.21-150500.55.116.1 SUSE-SU-2025:02588-1
SLE HPC 15 SP5 kernel-default-base 5.14.21-150500.55.116.1.150500.6.55.1 SUSE-SU-2025:02588-1
SLE HPC 15 SP4 kernel-64kb +5 5.14.21-150400.24.173.1 SUSE-SU-2025:02849-1
SLE HPC 15 SP4 kernel-default-base 5.14.21-150400.24.173.1.150400.24.88.1 SUSE-SU-2025:02849-1
SUSE Real Time Module 15 SP6 kernel-rt +3 6.4.0-150600.10.34.1 SUSE-SU-2025:1178-1
SUSE Manager Server LTS 4.3 kernel-default-base 5.14.21-150400.24.173.1.150400.24.88.1 SUSE-SU-2025:02849-1
SUSE Manager Server LTS 4.3 kernel-syms +3 5.14.21-150400.24.173.1 SUSE-SU-2025:02849-1
SUSE Manager Proxy LTS 4.3 kernel-default-base 5.14.21-150400.24.173.1.150400.24.88.1 SUSE-SU-2025:02849-1
SUSE Manager Proxy LTS 4.3 kernel-syms +2 5.14.21-150400.24.173.1 SUSE-SU-2025:02849-1
SUSE Enterprise Storage 7.1 kernel-64kb +6 5.3.18-150300.59.215.1 SUSE-SU-2025:02848-1
SUSE Enterprise Storage 7.1 kernel-default-base 5.3.18-150300.59.215.1.150300.18.128.1 SUSE-SU-2025:02848-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.6 dtb-aarch64 +4 6.4.0-150600.23.47.1 SUSE-SU-2025:1180-1
openSUSE Leap 15.6 kernel-64kb +5 6.4.0-150600.23.47.2 SUSE-SU-2025:1180-1
openSUSE Leap 15.6 kernel-azure +1 6.4.0-150600.8.34.2 SUSE-SU-2025:1177-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.47.2.150600.12.20.2 SUSE-SU-2025:1180-1
openSUSE Leap 15.6 kernel-rt +3 6.4.0-150600.10.34.1 SUSE-SU-2025:1178-1
openSUSE Leap 15.6 kernel-syms-azure 6.4.0-150600.8.34.1 SUSE-SU-2025:1177-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.130-139.222 1.0-0.amzn2023 ALAS2023-2025-901
Amazon Linux 2023 perf +14 6.1.130-139.222.amzn2023 ALAS2023-2025-901

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 2 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 50

References