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kernel: Linux kernel: Privilege escalation or Denial of Service via TCP Fast Open vulnerability

🗓️ 17 Dec 2025 03:45:59Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 3 Views

A local attacker can trigger use-after-free and double-free in TCP Fast Open handling, causing kernel panic, denial of service, or privilege escalation.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.6aarch64bpftool4.18.0-372.173.1.el8_6bpftool-4.18.0-372.173.1.el8_6.aarch64.rpm
Red Hat Enterprise Linux8.6ppc64lebpftool4.18.0-372.173.1.el8_6bpftool-4.18.0-372.173.1.el8_6.ppc64le.rpm
Red Hat Enterprise Linux8.6s390xbpftool4.18.0-372.173.1.el8_6bpftool-4.18.0-372.173.1.el8_6.s390x.rpm
Red Hat Enterprise Linux8.6x86_64bpftool4.18.0-372.173.1.el8_6bpftool-4.18.0-372.173.1.el8_6.x86_64.rpm
Red Hat Enterprise Linux8.6aarch64bpftool-debuginfo4.18.0-372.173.1.el8_6bpftool-debuginfo-4.18.0-372.173.1.el8_6.aarch64.rpm
Red Hat Enterprise Linux8.6ppc64lebpftool-debuginfo4.18.0-372.173.1.el8_6bpftool-debuginfo-4.18.0-372.173.1.el8_6.ppc64le.rpm
Red Hat Enterprise Linux8.6s390xbpftool-debuginfo4.18.0-372.173.1.el8_6bpftool-debuginfo-4.18.0-372.173.1.el8_6.s390x.rpm
Red Hat Enterprise Linux8.6x86_64bpftool-debuginfo4.18.0-372.173.1.el8_6bpftool-debuginfo-4.18.0-372.173.1.el8_6.x86_64.rpm
Red Hat Enterprise Linux8.6aarch64kernel4.18.0-372.173.1.el8_6kernel-4.18.0-372.173.1.el8_6.aarch64.rpm
Red Hat Enterprise Linux8.6ppc64lekernel4.18.0-372.173.1.el8_6kernel-4.18.0-372.173.1.el8_6.ppc64le.rpm
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30 Jul 2026 08:47Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.18.1
EPSS0.00533
3