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

🗓️ 30 May 2023 15:10:11Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 7 Views

Netfilter nf_tables batch requests use-after-free enables kernel access; CAP_NET_ADMIN users risk crash.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.8aarch64bpftool4.18.0-477.13.1.el8_8bpftool-4.18.0-477.13.1.el8_8.aarch64.rpm
Red Hat Enterprise Linux8.8ppc64lebpftool4.18.0-477.13.1.el8_8bpftool-4.18.0-477.13.1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8s390xbpftool4.18.0-477.13.1.el8_8bpftool-4.18.0-477.13.1.el8_8.s390x.rpm
Red Hat Enterprise Linux8.8x86_64bpftool4.18.0-477.13.1.el8_8bpftool-4.18.0-477.13.1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8aarch64bpftool-debuginfo4.18.0-477.13.1.el8_8bpftool-debuginfo-4.18.0-477.13.1.el8_8.aarch64.rpm
Red Hat Enterprise Linux8.8ppc64lebpftool-debuginfo4.18.0-477.13.1.el8_8bpftool-debuginfo-4.18.0-477.13.1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8s390xbpftool-debuginfo4.18.0-477.13.1.el8_8bpftool-debuginfo-4.18.0-477.13.1.el8_8.s390x.rpm
Red Hat Enterprise Linux8.8x86_64bpftool-debuginfo4.18.0-477.13.1.el8_8bpftool-debuginfo-4.18.0-477.13.1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8aarch64kernel4.18.0-477.13.1.el8_8kernel-4.18.0-477.13.1.el8_8.aarch64.rpm
Red Hat Enterprise Linux8.8ppc64lekernel4.18.0-477.13.1.el8_8kernel-4.18.0-477.13.1.el8_8.ppc64le.rpm
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29 Jun 2026 23:46Current
6.6Medium risk
Vulners AI Score6.6
CVSS 3.17.8
EPSS0.12966
SSVC
CWE-416
netfilternf tablesbatch requestsuse after freekernel accesscap net adminprivilege escalation
7