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kernel: Linux kernel: Out-of-bounds write in VXLAN due to incorrect nexthop hash size leading to denial of service

🗓️ 25 Feb 2026 14:18:41Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 4 Views

Linux kernel VXLAN DoS via out-of-bounds write from 31-bit nexthop hash error, requires CAP_NET_ADMIN.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.2x86_64kernel-rt5.14.0-284.158.1.rt14.443.el9_2kernel-rt-5.14.0-284.158.1.rt14.443.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-core5.14.0-284.158.1.rt14.443.el9_2kernel-rt-core-5.14.0-284.158.1.rt14.443.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug5.14.0-284.158.1.rt14.443.el9_2kernel-rt-debug-5.14.0-284.158.1.rt14.443.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-core5.14.0-284.158.1.rt14.443.el9_2kernel-rt-debug-core-5.14.0-284.158.1.rt14.443.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-debuginfo5.14.0-284.158.1.rt14.443.el9_2kernel-rt-debug-debuginfo-5.14.0-284.158.1.rt14.443.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-devel5.14.0-284.158.1.rt14.443.el9_2kernel-rt-debug-devel-5.14.0-284.158.1.rt14.443.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-kvm5.14.0-284.158.1.rt14.443.el9_2kernel-rt-debug-kvm-5.14.0-284.158.1.rt14.443.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-modules5.14.0-284.158.1.rt14.443.el9_2kernel-rt-debug-modules-5.14.0-284.158.1.rt14.443.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-modules-core5.14.0-284.158.1.rt14.443.el9_2kernel-rt-debug-modules-core-5.14.0-284.158.1.rt14.443.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-modules-extra5.14.0-284.158.1.rt14.443.el9_2kernel-rt-debug-modules-extra-5.14.0-284.158.1.rt14.443.el9_2.x86_64.rpm
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12 Jul 2026 02:02Current
7.2High risk
Vulners AI Score7.2
CVSS 3.17.8
EPSS0.00154
4