Riskcovery

CVE-2026-23412

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

State
Published
Severity
7.8 High
Published
Apr 2, 2026
Updated
Oct 19, 2026
Reserved
Jan 13, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • 84601d6ee68ae820dec97450934797046d62db4b to before d016c216bc75c45128160593a77b864a04dbe7c0Affected
  • 84601d6ee68ae820dec97450934797046d62db4b to before cb2bf5efdb02a2a59faf603604a1066e8266f349Affected
  • 84601d6ee68ae820dec97450934797046d62db4b to before c25e0dec366ae99b7264324ce3c7cbaea34691f9Affected
  • 84601d6ee68ae820dec97450934797046d62db4b to before 54244d54a971c26a0cd0a9073460ff71f3c51b32Affected
  • 84601d6ee68ae820dec97450934797046d62db4b to before 24f90fa3994b992d1a09003a3db2599330a5232aAffected
LinuxLinux
  • 6.4Affected
  • before 6.4Not affected
  • 6.6.130 through 6.6.*Not affected
  • 6.12.78 through 6.12.*Not affected
  • 6.18.20 through 6.18.*Not affected
  • 6.19.10 through 6.19.*Not affected
  • 7.0 and laterNot affected

References

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