CVE-2026-23412 (GCVE-0-2026-23412)

Vulnerability from cvelistv5 – Published: 2026-04-02 11:40 – Updated: 2026-04-13 06:06
VLAI?
Title
netfilter: bpf: defer hook memory release until rcu readers are done
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 84601d6ee68ae820dec97450934797046d62db4b , < d016c216bc75c45128160593a77b864a04dbe7c0 (git)
Affected: 84601d6ee68ae820dec97450934797046d62db4b , < cb2bf5efdb02a2a59faf603604a1066e8266f349 (git)
Affected: 84601d6ee68ae820dec97450934797046d62db4b , < c25e0dec366ae99b7264324ce3c7cbaea34691f9 (git)
Affected: 84601d6ee68ae820dec97450934797046d62db4b , < 54244d54a971c26a0cd0a9073460ff71f3c51b32 (git)
Affected: 84601d6ee68ae820dec97450934797046d62db4b , < 24f90fa3994b992d1a09003a3db2599330a5232a (git)
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    Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_bpf_link.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: bpf: defer hook memory release until rcu readers are done\n\nYiming Qian reports UaF when concurrent process is dumping hooks via\nnfnetlink_hooks:\n\nBUG: KASAN: slab-use-after-free in nfnl_hook_dump_one.isra.0+0xe71/0x10f0\nRead of size 8 at addr ffff888003edbf88 by task poc/79\nCall Trace:\n \u003cTASK\u003e\n nfnl_hook_dump_one.isra.0+0xe71/0x10f0\n netlink_dump+0x554/0x12b0\n nfnl_hook_get+0x176/0x230\n [..]\n\nDefer release until after concurrent readers have completed."
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-13T06:06:55.700Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23412",
    "datePublished": "2026-04-02T11:40:53.528Z",
    "dateReserved": "2026-01-13T15:37:46.013Z",
    "dateUpdated": "2026-04-13T06:06:55.700Z",
    "state": "PUBLISHED"
  },
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  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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