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Vulnerability · Published Aug 15, 2026 · Assigned by Linux

CVE-2026-72243selinux: check connect-related permissions on TCP Fast Open

High 8.4

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 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.4High
Exploit odds (30 days)0.2%top 94.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: selinux: check connect-related permissions on TCP Fast Open Similar to Landlock, SELinux was not updated when TCP Fast Open support was introduced to ensure connect-related permissions are checked when using TCP Fast Open. Update its socket_sendmsg() hook to call selinux_socket_connect() when MSG_FASTOPEN is passed.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9kernel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-64k5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-64k-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-64k-debug5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-64k-debug-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-64k-debug-devel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-64k-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-64k-devel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-64k-devel-matched5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-64k-modules5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-64k-modules-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-abi-stablelists5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-cross-headers5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-debug5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-debug-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-debug-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-debug-devel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-debug-devel-matched5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-debug-modules5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-debug-modules-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-debug-modules-extra5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-debug-uki-virt5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-devel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-devel-matched5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-doc6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-doc5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-headers6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-headers5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-modules5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-modules-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-modules-extra5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-debug5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-devel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-modules5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-debug5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-debug-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-debug-devel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-debug-modules5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-devel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-modules5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-modules-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-rt-modules-extra5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-tools5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-tools-libs5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-tools-libs-devel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-uki-virt5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-uki-virt-addons5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-zfcpdump5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-zfcpdump-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-zfcpdump-devel5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-zfcpdump-modules5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9libperf5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10perf6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9perf5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:10python3-perf6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9python3-perf5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9rtla5.14.0-687.49.1.el9_8ALSA-2026:68570
AlmaLinux:9rv5.14.0-687.49.1.el9_8ALSA-2026:68570
Debian:12linux6.1.180-1DEBIAN-CVE-2026-72243
Debian:13linux6.12.100-1DEBIAN-CVE-2026-72243
Debian:14linux7.1.5-1DEBIAN-CVE-2026-72243
Rocky Linux:9kernel0:5.14.0-687.49.1.el9_8RLSA-2026:68570
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux6.8.0-147.147UBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux7.0.0-38.38UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-aws6.8.0-1067.70UBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-aws7.0.0-1014.14UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-aws-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure6.8.0-1071.79UBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-azure7.0.0-1017.17UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1017.17~24.04.1UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1069.76UBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1016.16UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-gcp6.8.0-1071.79UBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-gcp7.0.0-1014.14UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-gke6.8.0-1066.74UBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-gke7.0.0-1008.9UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1052.56UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-38.38~24.04.4UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-ibm6.8.0-1067.68UBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-ibm7.0.0-1015.15UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-147.147.1UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1024.25~24.04.1UBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2022.23UBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1036.39UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1015.15UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-oracle6.8.0-1064.67UBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-oracle7.0.0-1013.13UBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-72243
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-72243
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-72243
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-72243

Affected products (as reported)

VendorProductVersions
Linux Linux cf60af03ca4e71134206809ea892e49b92a88896 – before 11406d0d7e11b4e525bb2ace2c70107031d058dacf60af03ca4e71134206809ea892e49b92a88896 – before e507633bf76bccf1a6af27771fb0d6e2862b7eaccf60af03ca4e71134206809ea892e49b92a88896 – before d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3cf60af03ca4e71134206809ea892e49b92a88896 – before fc633a598206d4f23af782db7c0b5f3a82751d2ccf60af03ca4e71134206809ea892e49b92a88896 – before 646ebbc5f2ff9147d084e1213143f091026a611ccf60af03ca4e71134206809ea892e49b92a88896 – before 44c74d27d1b9aaa99fa8a83640c1223575262b80
Linux Linux 3.6

References