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kernel: packet: use consistent hard_header_len in non-ring send paths

🗓️ 04 Sep 2026 08:22:12Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 4 Views

OOB write in Linux kernel packet_snd() via inconsistent header length allowing privilege escalation.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.8ppc64lebpftool4.18.0-477.165.1.el8_8bpftool-4.18.0-477.165.1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64bpftool4.18.0-477.165.1.el8_8bpftool-4.18.0-477.165.1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lebpftool-debuginfo4.18.0-477.165.1.el8_8bpftool-debuginfo-4.18.0-477.165.1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64bpftool-debuginfo4.18.0-477.165.1.el8_8bpftool-debuginfo-4.18.0-477.165.1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lekernel4.18.0-477.165.1.el8_8kernel-4.18.0-477.165.1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64kernel4.18.0-477.165.1.el8_8kernel-4.18.0-477.165.1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8noarchkernel-abi-stablelists4.18.0-477.165.1.el8_8kernel-abi-stablelists-4.18.0-477.165.1.el8_8.noarch.rpm
Red Hat Enterprise Linux8.8ppc64lekernel-core4.18.0-477.165.1.el8_8kernel-core-4.18.0-477.165.1.el8_8.ppc64le.rpm
Red Hat Enterprise Linux8.8x86_64kernel-core4.18.0-477.165.1.el8_8kernel-core-4.18.0-477.165.1.el8_8.x86_64.rpm
Red Hat Enterprise Linux8.8ppc64lekernel-debug4.18.0-477.165.1.el8_8kernel-debug-4.18.0-477.165.1.el8_8.ppc64le.rpm
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04 Sep 2026 16:27Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.8
EPSS0.0012
4