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High · 7.8 CVE-2024-27395 EUVD-2024-24599GHSA-97fh-3x83-fvh6

net: openvswitch: Fix Use-After-Free in ovs_ct_exit

Published May 9, 2024 · Updated Oct 15, 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-6.8 Package: linux-aws-fips Package: linux-azure 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-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 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-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-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 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-6.2 Package: linux-hwe-6.5 Package: linux-hwe-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-5.4 Package: linux-ibm-6.8 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-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency 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-6.5 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-oracle-6.8 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.8 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-6.5 Package: linux-riscv-6.8 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: openvswitch: Fix Use-After-Free in ovs_ct_exit

Since kfree_rcu, which is called in the hlist_for_each_entry_rcu traversal
of ovs_ct_limit_exit, is not part of the RCU read critical section, it
is possible that the RCU grace period will pass during the traversal and
the key will be free.

To prevent this, it should be changed to hlist_for_each_entry_safe.

Affected products

VendorProductAffectedFixed
Linux Linux 4.18 4.19.313

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 6.8.9-1 —
Debian 13 linux 6.8.9-1 —
Debian 12 linux 6.1.90-1 —
Debian 10 linux 4.19.316-1 DLA-3840-1
Debian 10 linux-5.10 5.10.216-1~deb10u1 DLA-3842-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1047.49 —
Ubuntu 24.04 LTS linux 6.8.0-40.40 USN-6949-1
Ubuntu 24.04 LTS linux-aws 6.8.0-1013.14 USN-6949-1
Ubuntu 24.04 LTS linux-azure 6.8.0-1012.14 USN-6952-2
Ubuntu 24.04 LTS linux-gcp 6.8.0-1012.13 USN-6949-1
Ubuntu 24.04 LTS linux-gke 6.8.0-1008.11 USN-6949-1
Ubuntu 24.04 LTS linux-ibm +2 6.8.0-1010.10 USN-6955-1, USN-6952-1, USN-6949-1
Ubuntu 24.04 LTS linux-nvidia 6.8.0-1011.11 USN-6949-1
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1011.11.1 USN-6952-1
Ubuntu 24.04 LTS linux-raspi 6.8.0-1009.10 USN-6949-2
Ubuntu 24.04 LTS linux-riscv +1 6.8.0-40.40.1 USN-6949-2
Ubuntu 22.04 LTS linux +1 5.15.0-116.126 USN-6898-2, USN-6898-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1065.71 USN-6898-3
Ubuntu 22.04 LTS linux-aws-6.8 6.8.0-1013.14~22.04.1 —
Ubuntu 22.04 LTS linux-azure 5.15.0-1068.77 USN-6917-1
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1012.14~22.04.1 —
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1068.77.1 USN-6917-1
Ubuntu 22.04 LTS linux-gcp 5.15.0-1064.72 USN-6898-1
Ubuntu 22.04 LTS linux-gcp-6.8 6.8.0-1012.13~22.04.1 —
Ubuntu 22.04 LTS linux-gke 5.15.0-1062.68 USN-6898-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1048.55 USN-6898-1
Ubuntu 22.04 LTS linux-hwe-6.8 6.8.0-40.40~22.04.3 —
Ubuntu 22.04 LTS linux-ibm +1 5.15.0-1058.61 USN-6919-1, USN-6898-1
Ubuntu 22.04 LTS linux-ibm-6.8 +1 6.8.0-1010.10~22.04.1 —
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1060.66 USN-6898-1
Ubuntu 22.04 LTS linux-kvm 5.15.0-1062.67 USN-6898-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1060.61 USN-6898-1
Ubuntu 22.04 LTS linux-nvidia-6.8 6.8.0-1011.11~22.04.1 USN-6949-1
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1026.26 —
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1015.15 —
Ubuntu 22.04 LTS linux-oracle 5.15.0-1063.69 USN-6898-1
Ubuntu 22.04 LTS linux-riscv +31 No fix yet —
Ubuntu 22.04 LTS linux-riscv-6.8 +1 6.8.0-40.40.1~22.04.1 —
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1035.39 USN-7019-1
Ubuntu 20.04 LTS linux 5.4.0-189.209 USN-6896-1
Ubuntu 20.04 LTS linux-aws 5.4.0-1128.138 USN-6896-5
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1065.71~20.04.1 USN-6898-4
Ubuntu 20.04 LTS linux-azure 5.4.0-1133.140 USN-6896-1
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1068.77~20.04.1 USN-6917-1
Ubuntu 20.04 LTS linux-azure-fde-5.15 5.15.0-1068.77~20.04.1.1 USN-6917-1
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1088.95 USN-6896-1
Ubuntu 20.04 LTS linux-gcp 5.4.0-1132.141 USN-6896-1
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1065.73~20.04.1 USN-6927-1
Ubuntu 20.04 LTS linux-gke +26 No fix yet —
Ubuntu 20.04 LTS linux-gkeop 5.4.0-1095.99 USN-6896-1
Ubuntu 20.04 LTS linux-gkeop-5.15 5.15.0-1048.55~20.04.1 USN-6898-1
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-116.126~20.04.1 USN-6898-3, USN-6898-2
Ubuntu 20.04 LTS linux-ibm 5.4.0-1075.80 USN-6896-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1058.61~20.04.1 USN-6898-2
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1060.66~20.04.1 USN-6898-1
Ubuntu 20.04 LTS linux-iot 5.4.0-1040.41 USN-6896-5
Ubuntu 20.04 LTS linux-kvm 5.4.0-1116.123 USN-6896-1
Ubuntu 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1027.27~20.04.1 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1127.136 USN-6896-3
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1063.69~20.04.1 USN-6898-2
Ubuntu 20.04 LTS linux-raspi 5.4.0-1112.124 USN-6896-4
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1061.65~20.04.1 —
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1047.51 USN-6896-3
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2008.8 —
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1006.6 —
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1058.60 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1066.74 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1006.6~22.04.1 —
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-78.78+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1065.71+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1068.77+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-115.125+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1064.72+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1128.138+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1133.140+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1102.112 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1132.141+fips1 —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro 18.04 LTS linux-aws-5.4 5.4.0-1128.138~18.04.1 USN-6896-5
Ubuntu Pro 18.04 LTS linux-azure-5.4 5.4.0-1133.140~18.04.1 USN-6896-1
Ubuntu Pro 18.04 LTS linux-gcp-5.4 5.4.0-1132.141~18.04.1 USN-6896-1
Ubuntu Pro 18.04 LTS linux-hwe-5.4 5.4.0-189.209~18.04.1 USN-6896-2
Ubuntu Pro 18.04 LTS linux-ibm-5.4 5.4.0-1075.80~18.04.1 USN-6896-1
Ubuntu Pro 18.04 LTS linux-oracle-5.4 5.4.0-1127.136~18.04.1 USN-6896-2
Ubuntu Pro 18.04 LTS linux-raspi-5.4 5.4.0-1112.124~18.04.1 USN-6896-4
ReleasePackageFixed inAdvisory
RHEL 9 bpftool 7.4.0-503.11.1.el9_5 RHSA-2024:9315
RHEL 9 rv +67 5.14.0-503.11.1.el9_5 RHSA-2024:9315
RHEL 8 kernel-rt +12 4.18.0-553.16.1.rt7.357.el8_10 RHSA-2024:5102
RHEL 8 perf +26 4.18.0-553.16.1.el8_10 RHSA-2024:5101
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 9.4 EUS bpftool 7.3.0-427.57.1.el9_4 RHSA-2025:2270
RHEL 9.4 EUS rv +64 5.14.0-427.57.1.el9_4 RHSA-2025:2270

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 8 kernel-rt +11 4.18.0-553.16.1.rt7.357.el8_10 ALSA-2024:5102
AlmaLinux 8 perf +24 4.18.0-553.16.1.el8_10 ALSA-2024:5101

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 kernel 4.18.0-553.16.1.el8_10 RXSA-2024:5101, RLSA-2024:5101
Rocky Linux 8 kernel-rt 4.18.0-553.16.1.rt7.357.el8_10 RLSA-2024:5102
ReleasePackageFixed inAdvisory
SLES 15 SP6 kernel-64kb +3 6.4.0-150600.23.7.3 SUSE-SU-2024:2203-1
SLES 15 SP6 kernel-azure +1 6.4.0-150600.8.5.4 SUSE-SU-2024:2135-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.7.3.150600.12.2.7 SUSE-SU-2024:2203-1
SLES 15 SP6 kernel-docs 6.4.0-150600.23.7.4 SUSE-SU-2024:2203-1
SLES 15 SP6 kernel-source 6.4.0-150600.23.7.2 SUSE-SU-2024:2203-1
SLES 15 SP6 kernel-syms 6.4.0-150600.23.7.1 SUSE-SU-2024:2203-1
SLES 15 SP6 kernel-syms-azure 6.4.0-150600.8.5.1 SUSE-SU-2024:2135-1
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.68.1 SUSE-SU-2024:2190-1
SLES 15 SP5 kernel-azure +2 5.14.21-150500.33.57.1 SUSE-SU-2024:2019-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.68.1.150500.6.31.1 SUSE-SU-2024:2190-1
Show 6 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLE Micro 6.0 kernel-default-base 6.4.0-17.1.1.51 SUSE-SU-2025:20008-1
SLE Micro 6.0 kernel-rt +1 6.4.0-9.1 SUSE-SU-2025:20028-1
SLE Micro 6.0 kernel-source +2 6.4.0-18.1 SUSE-SU-2025:20008-1
SLE Micro 5.5 kernel-default 5.14.21-150500.55.68.1 SUSE-SU-2024:2190-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.68.1.150500.6.31.1 SUSE-SU-2024:2190-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.58.1 SUSE-SU-2024:2008-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.7.3 SUSE-SU-2024:2203-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_1 1-150600.1.5.1 SUSE-SU-2024:2973-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_1 1-150600.13.3.7 SUSE-SU-2024:2203-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.68.1 SUSE-SU-2024:2190-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_15 +1 1-150500.11.3.1 SUSE-SU-2024:2190-1, SUSE-SU-2024:2008-1
SUSE Real Time Module 15 SP6 kernel-rt +3 6.4.0-150600.10.5.1 SUSE-SU-2024:2973-1
SUSE Real Time Module 15 SP5 kernel-rt +3 5.14.21-150500.13.58.1 SUSE-SU-2024:2008-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.6 dtb-aarch64 +2 6.4.0-150600.23.7.1 SUSE-SU-2024:2203-1
openSUSE Leap 15.6 kernel-64kb +5 6.4.0-150600.23.7.3 SUSE-SU-2024:2203-1
openSUSE Leap 15.6 kernel-azure +1 6.4.0-150600.8.5.4 SUSE-SU-2024:2135-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.7.3.150600.12.2.7 SUSE-SU-2024:2203-1
openSUSE Leap 15.6 kernel-docs 6.4.0-150600.23.7.4 SUSE-SU-2024:2203-1
openSUSE Leap 15.6 kernel-rt +3 6.4.0-150600.10.5.1 SUSE-SU-2024:2973-1
openSUSE Leap 15.6 kernel-source 6.4.0-150600.23.7.2 SUSE-SU-2024:2203-1
openSUSE Leap 15.6 kernel-syms-azure 6.4.0-150600.8.5.1 SUSE-SU-2024:2135-1
openSUSE Leap 15.5 dtb-aarch64 +10 5.14.21-150500.55.68.1 SUSE-SU-2024:2190-1
openSUSE Leap 15.5 kernel-azure +2 5.14.21-150500.33.57.1 SUSE-SU-2024:2019-1
openSUSE Leap 15.5 kernel-default-base 5.14.21-150500.55.68.1.150500.6.31.1 SUSE-SU-2024:2190-1
openSUSE Leap 15.5 kernel-rt +3 5.14.21-150500.13.58.1 SUSE-SU-2024:2008-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.90-99.173 1.0-0.amzn2023 ALAS2023-2024-695
Amazon Linux 2023 perf +14 6.1.90-99.173.amzn2023 ALAS2023-2024-695

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 bpftool 7.4.0-503.11.1.el9_5 ELSA-2024-9315
Oracle Linux 9 rv +28 5.14.0-503.11.1.el9_5 ELSA-2024-9315
Oracle Linux 8 perf +19 4.18.0-553.16.1.el8_10 ELSA-2024-5101

Advisories 46

References