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

🗓️ 06 Jun 2023 08:48:57Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 5 Views

Netfilter nf_tables batch processing use-after-free enables kernel reads and writes, risking crash or privilege escalation.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.0x86_64kernel-rt5.14.0-70.58.1.rt21.129.el9_0kernel-rt-5.14.0-70.58.1.rt21.129.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-core5.14.0-70.58.1.rt21.129.el9_0kernel-rt-core-5.14.0-70.58.1.rt21.129.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug5.14.0-70.58.1.rt21.129.el9_0kernel-rt-debug-5.14.0-70.58.1.rt21.129.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-core5.14.0-70.58.1.rt21.129.el9_0kernel-rt-debug-core-5.14.0-70.58.1.rt21.129.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-debuginfo5.14.0-70.58.1.rt21.129.el9_0kernel-rt-debug-debuginfo-5.14.0-70.58.1.rt21.129.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-devel5.14.0-70.58.1.rt21.129.el9_0kernel-rt-debug-devel-5.14.0-70.58.1.rt21.129.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-kvm5.14.0-70.58.1.rt21.129.el9_0kernel-rt-debug-kvm-5.14.0-70.58.1.rt21.129.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-modules5.14.0-70.58.1.rt21.129.el9_0kernel-rt-debug-modules-5.14.0-70.58.1.rt21.129.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debug-modules-extra5.14.0-70.58.1.rt21.129.el9_0kernel-rt-debug-modules-extra-5.14.0-70.58.1.rt21.129.el9_0.x86_64.rpm
Red Hat Enterprise Linux9.0x86_64kernel-rt-debuginfo5.14.0-70.58.1.rt21.129.el9_0kernel-rt-debuginfo-5.14.0-70.58.1.rt21.129.el9_0.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 tablesuse after freebatch processingkernel memoryprivilege escalationlocal usernetwork administrator capability
5