High 7.8Published Apr 2, 2026

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

Updated under an hour ago (Oct 28, 2026, 1:50 AM ET)

Does this affect you?

It affects Linux and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 84601d6ee68ae820dec97450934797046d62db4b before d016c216bc75c45128160593a77b864a04dbe7c0; from 84601d6ee68ae820dec97450934797046d62db4b before cb2bf5efdb02a2a59faf603604a1066e8266f349; from 84601d6ee68ae820dec97450934797046d62db4b before c25e0dec366ae99b7264324ce3c7cbaea34691f9; 84601d6ee68ae820dec97450934797046d62db4b builds before 54244d54a971c26a0cd0a9073460ff71f3c51b32; 84601d6ee68ae820dec97450934797046d62db4b builds before 24f90fa3994b992d1a09003a3db2599330a5232a	CNA record
linux linux_kernel linux:linux_kernel	from 6.4.1 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.20; from 6.19 before 6.19.10; 6.4; 7.0; 7.0; 7.0; and 4 more ranges	NVD

References

References

https://git.kernel.org/stable/c/d016c216bc75c45128160593a77b864a04dbe7c0	patch
https://git.kernel.org/stable/c/cb2bf5efdb02a2a59faf603604a1066e8266f349	patch
https://git.kernel.org/stable/c/c25e0dec366ae99b7264324ce3c7cbaea34691f9	patch
https://git.kernel.org/stable/c/54244d54a971c26a0cd0a9073460ff71f3c51b32	patch
https://git.kernel.org/stable/c/24f90fa3994b992d1a09003a3db2599330a5232a	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.