CVE-2026-23412netfilter: bpf: defer hook memory release until rcu readers are done
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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)
- Not given
- 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 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
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
- https://git.kernel.org/stable/c/d016c216bc75c45128160593a77b864a04dbe7c0patch
- https://git.kernel.org/stable/c/cb2bf5efdb02a2a59faf603604a1066e8266f349patch
- https://git.kernel.org/stable/c/c25e0dec366ae99b7264324ce3c7cbaea34691f9patch
- https://git.kernel.org/stable/c/54244d54a971c26a0cd0a9073460ff71f3c51b32patch
- https://git.kernel.org/stable/c/24f90fa3994b992d1a09003a3db2599330a5232apatch
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.