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kernel: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache

🗓️ 06 May 2026 14:14:57Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 18 Views

NFSv4.0 nfsd heap overflow in LOCK replay cache; remote attacker with two clients can trigger a slab overflow write, risking code execution or DoS.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.4x86_64bpftool4.18.0-305.190.1.el8_4bpftool-4.18.0-305.190.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64bpftool-debuginfo4.18.0-305.190.1.el8_4bpftool-debuginfo-4.18.0-305.190.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel4.18.0-305.190.1.el8_4kernel-4.18.0-305.190.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4noarchkernel-abi-stablelists4.18.0-305.190.1.el8_4kernel-abi-stablelists-4.18.0-305.190.1.el8_4.noarch.rpm
Red Hat Enterprise Linux8.4x86_64kernel-core4.18.0-305.190.1.el8_4kernel-core-4.18.0-305.190.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-debug4.18.0-305.190.1.el8_4kernel-debug-4.18.0-305.190.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-debug-core4.18.0-305.190.1.el8_4kernel-debug-core-4.18.0-305.190.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-debug-debuginfo4.18.0-305.190.1.el8_4kernel-debug-debuginfo-4.18.0-305.190.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-debug-devel4.18.0-305.190.1.el8_4kernel-debug-devel-4.18.0-305.190.1.el8_4.x86_64.rpm
Red Hat Enterprise Linux8.4x86_64kernel-debug-modules4.18.0-305.190.1.el8_4kernel-debug-modules-4.18.0-305.190.1.el8_4.x86_64.rpm
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12 Jul 2026 02:58Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.19.8
EPSS0.0049
18