PT-2026-29719 · Linux · Linux

Published 2026-04-02 · Updated 2026-04-02 · CVE-2026-23412

NVD

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: 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.

Related Identifiers

CVE-2026-23412

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-23412 · Security Note
• https://git.kernel.org/stable/c/cb2bf5efdb02a2a59faf603604a1066e8266f349 · Note
• https://git.kernel.org/stable/c/d016c216bc75c45128160593a77b864a04dbe7c0 · Note
• https://git.kernel.org/stable/c/c25e0dec366ae99b7264324ce3c7cbaea34691f9 · Note
• https://git.kernel.org/stable/c/24f90fa3994b992d1a09003a3db2599330a5232a · Note
• https://git.kernel.org/stable/c/54244d54a971c26a0cd0a9073460ff71f3c51b32 · Note