HarborGuard / CVE
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HIGHCVE-2026-23412Published Modified CNA Linux

CVE-2026-23412: netfilter: bpf: defer hook memory release until rcu readers are done

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.

Metrics

CVSS v3.1
7.8
Severity
HIGH
Fixed in
0
Affected Products
2

Fix available

024f90fa3994b992d1a09003a3db2599330a5232a54244d54a971c26a0cd0a9073460ff71f3c51b326.6.1306.12.786.18.206.19.107.0c25e0dec366ae99b7264324ce3c7cbaea34691f9cb2bf5efdb02a2a59faf603604a1066e8266f349d016c216bc75c45128160593a77b864a04dbe7c0
Affected packages
  • Linux / Linux
    < d016c216bc75c45128160593a77b864a04dbe7c0 (from 84601d6ee68ae820dec97450934797046d62db4b) · < cb2bf5efdb02a2a59faf603604a1066e8266f349 (from 84601d6ee68ae820dec97450934797046d62db4b) · < c25e0dec366ae99b7264324ce3c7cbaea34691f9 (from 84601d6ee68ae820dec97450934797046d62db4b) · < 54244d54a971c26a0cd0a9073460ff71f3c51b32 (from 84601d6ee68ae820dec97450934797046d62db4b) · < 24f90fa3994b992d1a09003a3db2599330a5232a (from 84601d6ee68ae820dec97450934797046d62db4b)
  • Linux / Linux
    6.4
    Fixed in 0, 6.6.130, 6.12.78, 6.18.20, 6.19.10, 7.0
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References