Vulnerability-Lookup

FKIE_CVE-2026-23412

Vulnerability from fkie_nvd - Published: 2026-04-02 12:16 - Updated: 2026-04-24 15:23

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/24f90fa3994b992d1a09003a3db2599330a5232a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/54244d54a971c26a0cd0a9073460ff71f3c51b32	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c25e0dec366ae99b7264324ce3c7cbaea34691f9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cb2bf5efdb02a2a59faf603604a1066e8266f349	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d016c216bc75c45128160593a77b864a04dbe7c0	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.4
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5ED2C179-5F1F-4BB1-9DEA-A21F23BC569B",
              "versionEndExcluding": "6.6.130",
              "versionStartIncluding": "6.4.1",
              "vulnerable": true
            },
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              "versionStartIncluding": "6.7",
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              "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6",
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              "vulnerable": true
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          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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."
    }
  ],
  "id": "CVE-2026-23412",
  "lastModified": "2026-04-24T15:23:00.193",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-04-02T12:16:20.270",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    }
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-04-02 11:40 – Updated: 2026-04-13 06:06

Title

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

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d016c216bc75c4512…
	https://git.kernel.org/stable/c/cb2bf5efdb02a2a59…
	https://git.kernel.org/stable/c/c25e0dec366ae99b7…
	https://git.kernel.org/stable/c/54244d54a971c26a0…
	https://git.kernel.org/stable/c/24f90fa3994b992d1…

Impacted products

Vendor

Product

Version

Linux

Affected: 84601d6ee68ae820dec97450934797046d62db4b , < d016c216bc75c45128160593a77b864a04dbe7c0 (git)
Affected: 84601d6ee68ae820dec97450934797046d62db4b , < cb2bf5efdb02a2a59faf603604a1066e8266f349 (git)
Affected: 84601d6ee68ae820dec97450934797046d62db4b , < c25e0dec366ae99b7264324ce3c7cbaea34691f9 (git)
Affected: 84601d6ee68ae820dec97450934797046d62db4b , < 54244d54a971c26a0cd0a9073460ff71f3c51b32 (git)
Affected: 84601d6ee68ae820dec97450934797046d62db4b , < 24f90fa3994b992d1a09003a3db2599330a5232a (git)

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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_bpf_link.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "d016c216bc75c45128160593a77b864a04dbe7c0",
              "status": "affected",
              "version": "84601d6ee68ae820dec97450934797046d62db4b",
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              "lessThan": "cb2bf5efdb02a2a59faf603604a1066e8266f349",
              "status": "affected",
              "version": "84601d6ee68ae820dec97450934797046d62db4b",
              "versionType": "git"
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              "lessThan": "c25e0dec366ae99b7264324ce3c7cbaea34691f9",
              "status": "affected",
              "version": "84601d6ee68ae820dec97450934797046d62db4b",
              "versionType": "git"
            },
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              "lessThan": "54244d54a971c26a0cd0a9073460ff71f3c51b32",
              "status": "affected",
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_bpf_link.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.4"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "version": "6.6.130",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.12.78",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.18.20",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.19.10",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "7.0",
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        },
        {
          "url": "https://git.kernel.org/stable/c/24f90fa3994b992d1a09003a3db2599330a5232a"
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      ],
      "title": "netfilter: bpf: defer hook memory release until rcu readers are done",
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        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "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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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-23412

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

Tags

Sightings

Nomenclature