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kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation

🗓️ 30 May 2023 15:07:04Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 9 Views

Netfilter nf_tables batch processing use-after-free enables kernel reads and local privilege escalation.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.8x86_64kernel-rt0:4.18.0-477.13.1.rt7.276.el8_8kernel-rt-0:4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8x86_64kernel-rt-core0:4.18.0-477.13.1.rt7.276.el8_8kernel-rt-core-0:4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8x86_64kernel-rt-debug0:4.18.0-477.13.1.rt7.276.el8_8kernel-rt-debug-0:4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8x86_64kernel-rt-debug-core0:4.18.0-477.13.1.rt7.276.el8_8kernel-rt-debug-core-0:4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8x86_64kernel-rt-debug-debuginfo0:4.18.0-477.13.1.rt7.276.el8_8kernel-rt-debug-debuginfo-0:4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8x86_64kernel-rt-debug-devel0:4.18.0-477.13.1.rt7.276.el8_8kernel-rt-debug-devel-0:4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8x86_64kernel-rt-debug-kvm0:4.18.0-477.13.1.rt7.276.el8_8kernel-rt-debug-kvm-0:4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8x86_64kernel-rt-debug-modules0:4.18.0-477.13.1.rt7.276.el8_8kernel-rt-debug-modules-0:4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8x86_64kernel-rt-debug-modules-extra0:4.18.0-477.13.1.rt7.276.el8_8kernel-rt-debug-modules-extra-0:4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8x86_64kernel-rt-debuginfo0:4.18.0-477.13.1.rt7.276.el8_8kernel-rt-debuginfo-0:4.18.0-477.13.1.rt7.276.el8_8.x86_64.rpm
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28 Jun 2026 12:39Current
6.6Medium risk
Vulners AI Score6.6
CVSS 3.17.8
EPSS0.12966
SSVC
CWE-416
netfilternf_tablesbatch processinguse after freekernel readslocal privilege escalation
9