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Vulnerability · Published Sep 24, 2026 · Assigned by Linux

CVE-2026-93288netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 97.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_log: wait for rcu grace period before freeing pernet state sashiko reports: "nfnl_log_net_exit() calls nf_log_unset(), which clears the logger pointer without an RCU grace period. Immediately after, ops_free_list() frees the per-net state while concurrent packets might still be executing nf_log_packet() under rcu_read_lock()." Clear the pointer via .pre_exit to make sure rcu readers have completed before pernet storage is free'd. The change in nf_log_syslog.c is only done for consistency: it doesn't use pernet data.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-64k6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-debug6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-debug-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-debug-modules6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-debug-modules-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-debug-modules-extra6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-devel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-modules6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-modules-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-64k-modules-extra6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-abi-stablelists6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-abi-stablelists4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-core4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-cross-headers6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-cross-headers4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-debug6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-debug4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-debug-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-debug-core4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-debug-devel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-debug-devel4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-debug-modules6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-debug-modules4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-debug-modules-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-debug-modules-extra6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-debug-uki-virt6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-devel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-devel4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-devel-matched6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-doc6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-doc4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-headers6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-headers4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-modules6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-modules4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-modules-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-modules-extra6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-modules-extra4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-modules-extra-matched6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-rt4.18.0-553.176.1.rt7.517.el8_10ALSA-2026:85774
AlmaLinux:10kernel-rt-64k6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-debug6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-debug-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-debug-devel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-debug-modules6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-debug-modules-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-debug-modules-extra6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-devel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-modules6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-modules-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-64k-modules-extra6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-rt-core4.18.0-553.176.1.rt7.517.el8_10ALSA-2026:85774
AlmaLinux:10kernel-rt-debug6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-rt-debug4.18.0-553.176.1.rt7.517.el8_10ALSA-2026:85774
AlmaLinux:10kernel-rt-debug-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-rt-debug-core4.18.0-553.176.1.rt7.517.el8_10ALSA-2026:85774
AlmaLinux:10kernel-rt-debug-devel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.176.1.rt7.517.el8_10ALSA-2026:85774
AlmaLinux:10kernel-rt-debug-modules6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.176.1.rt7.517.el8_10ALSA-2026:85774
AlmaLinux:10kernel-rt-debug-modules-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-debug-modules-extra6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.176.1.rt7.517.el8_10ALSA-2026:85774
AlmaLinux:10kernel-rt-devel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-rt-devel4.18.0-553.176.1.rt7.517.el8_10ALSA-2026:85774
AlmaLinux:10kernel-rt-modules6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-rt-modules4.18.0-553.176.1.rt7.517.el8_10ALSA-2026:85774
AlmaLinux:10kernel-rt-modules-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-rt-modules-extra6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.176.1.rt7.517.el8_10ALSA-2026:85774
AlmaLinux:10kernel-tools6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-tools4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-tools-libs6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-tools-libs4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-tools-libs-devel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-uki-virt6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-uki-virt-addons6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-zfcpdump6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-zfcpdump4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-zfcpdump-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-zfcpdump-modules6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10kernel-zfcpdump-modules-core6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10kernel-zfcpdump-modules-extra6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10libperf6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10perf6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8perf4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10python3-perf6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:8python3-perf4.18.0-553.176.1.el8_10ALSA-2026:85773
AlmaLinux:10rtla6.12.0-211.63.1.el10_2ALSA-2026:76738
AlmaLinux:10rv6.12.0-211.63.1.el10_2ALSA-2026:76738
Debian:12linux6.1.190-1DEBIAN-CVE-2026-93288
Debian:13linux6.12.111-1DEBIAN-CVE-2026-93288
Debian:14linux7.2.6-1DEBIAN-CVE-2026-93288
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2026-93288
Rocky Linux:8kernel0:4.18.0-553.176.1.el8_10RLSA-2026:85773
Rocky Linux:8kernel-rt0:4.18.0-553.176.1.rt7.517.el8_10RLSA-2026:85774
Ubuntu:22.04:LTSlinux5.15.0-202.212UBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-93288
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-aws5.15.0-1119.126UBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-93288
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-azure5.15.0-1125.134UBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-93288
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1124.133UBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-93288
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-gcp5.15.0-1120.130UBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-93288
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-gke5.15.0-1115.121UBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-93288
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1102.110UBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-ibm5.15.0-1113.117UBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-93288
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1114.120UBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-kvm5.15.0-1111.116UBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-197.207UBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1114.115UBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-93288
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-93288
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-93288
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-93288
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-93288

Affected products (as reported)

VendorProductVersions
Linux Linux c83fa19603bdaeef17b815713dbbe3230c8a34ee – before ba2e246aa294f9acd86194ea87fb6834ed0a37acc83fa19603bdaeef17b815713dbbe3230c8a34ee – before 5570d6c8b320dbcc602617ee08c27ce752fed65ac83fa19603bdaeef17b815713dbbe3230c8a34ee – before 3b9aa62d78ce80de47af2db472ff452398755213c83fa19603bdaeef17b815713dbbe3230c8a34ee – before f4461654374576e9d5d0245fd534c46ad8509051c83fa19603bdaeef17b815713dbbe3230c8a34ee – before dc20050b6b12ca58066715d088e1a537535d938dc83fa19603bdaeef17b815713dbbe3230c8a34ee – before 33d1469b0124cc0baaea7a2032123b77a81e0940
Linux Linux 4.12

References