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Vulnerability record · CVE-2026-23412 · published 2 April 2026

CVE-2026-23412: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.12% · top 98.5% CWE-416 · Use after free
7.8CVSS 3.1 base score
0.12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

Description

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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-23412), CISA KEV, FIRST EPSS (scores of 2026-09-25). This page is refreshed as NVD updates the record.