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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.

PUBLISHED Reserved 2026-01-13 | Published 2026-04-02 | Updated 2026-05-11 | Assigner Linux




HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Product status

Default status
unaffected

84601d6ee68ae820dec97450934797046d62db4b (git) before d016c216bc75c45128160593a77b864a04dbe7c0
affected

84601d6ee68ae820dec97450934797046d62db4b (git) before cb2bf5efdb02a2a59faf603604a1066e8266f349
affected

84601d6ee68ae820dec97450934797046d62db4b (git) before c25e0dec366ae99b7264324ce3c7cbaea34691f9
affected

84601d6ee68ae820dec97450934797046d62db4b (git) before 54244d54a971c26a0cd0a9073460ff71f3c51b32
affected

84601d6ee68ae820dec97450934797046d62db4b (git) before 24f90fa3994b992d1a09003a3db2599330a5232a
affected

Default status
affected

6.4
affected

Any version before 6.4
unaffected

6.6.130 (semver)
unaffected

6.12.78 (semver)
unaffected

6.18.20 (semver)
unaffected

6.19.10 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/d016c216bc75c45128160593a77b864a04dbe7c0

git.kernel.org/...c/cb2bf5efdb02a2a59faf603604a1066e8266f349

git.kernel.org/...c/c25e0dec366ae99b7264324ce3c7cbaea34691f9

git.kernel.org/...c/54244d54a971c26a0cd0a9073460ff71f3c51b32

git.kernel.org/...c/24f90fa3994b992d1a09003a3db2599330a5232a

cve.org (CVE-2026-23412)

nvd.nist.gov (CVE-2026-23412)

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