CVE-2026-23412

Summary

In the Linux kernel, the following vulnerability has been resolved:

netfilter: bpf: defer hook memory release until rcu readers are done

Yiming Qian reports UaF when concurrent process is dumping hooks via nfnetlink_hooks:

BUG: KASAN: slab-use-after-free in nfnl_hook_dump_one.isra.0+0xe71/0x10f0 Read of size 8 at addr ffff888003edbf88 by task poc/79 Call Trace: <TASK> nfnl_hook_dump_one.isra.0+0xe71/0x10f0 netlink_dump+0x554/0x12b0 nfnl_hook_get+0x176/0x230 [..]

Defer release until after concurrent readers have completed.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux84601d6ee68ae820dec97450934797046d62db4b < d016c216bc75c45128160593a77b864a04dbe7c0affected
LinuxLinux84601d6ee68ae820dec97450934797046d62db4b < cb2bf5efdb02a2a59faf603604a1066e8266f349affected
LinuxLinux84601d6ee68ae820dec97450934797046d62db4b < c25e0dec366ae99b7264324ce3c7cbaea34691f9affected
LinuxLinux84601d6ee68ae820dec97450934797046d62db4b < 54244d54a971c26a0cd0a9073460ff71f3c51b32affected
LinuxLinux84601d6ee68ae820dec97450934797046d62db4b < 24f90fa3994b992d1a09003a3db2599330a5232aaffected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.6.130 <= 6.6.*unaffected
LinuxLinux6.12.78 <= 6.12.*unaffected
LinuxLinux6.18.20 <= 6.18.*unaffected
LinuxLinux6.19.10 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References