Vulnerability-Lookup

FKIE_CVE-2026-46208

Vulnerability from fkie_nvd - Published: 2026-05-28 10:16 - Updated: 2026-06-19 13:16

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: batman-adv: stop tp_meter sessions during mesh teardown TP meter sessions remain linked on bat_priv->tp_list after the netlink request has already finished. When the mesh interface is removed, batadv_mesh_free() currently tears down the mesh without first draining these sessions. A running sender thread or a late incoming tp_meter packet can then keep processing against a mesh instance which is already shutting down. Synchronize tp_meter with the mesh lifetime by stopping all active sessions from batadv_mesh_free() and waiting for sender threads to exit before teardown continues.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/03660dab86f93319178a24667f6998526dc4355d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/268078acae72daa12b17b2b299701cb9924e469a
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/26dfeee8db81354bfdade155f27f9e16510ad196	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3d3cf6a7314aca4df0a6dde28ce784a2a30d0166	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/58943b7ea356294749dae3e75b96c0ee292c00be
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5e7d0ac936354c36810e74ac3056b334ed1f4058
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/79bc0eaeef2c5797317bf2da8e3159a74d62ec47	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8634c1dbd73adb74d40533ebb7e914efb82e71fb	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/batman-adv/main.c",
            "net/batman-adv/tp_meter.c",
            "net/batman-adv/tp_meter.h",
            "net/batman-adv/types.h"
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      ],
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: stop tp_meter sessions during mesh teardown\n\nTP meter sessions remain linked on bat_priv-\u003etp_list after the netlink\nrequest has already finished. When the mesh interface is removed,\nbatadv_mesh_free() currently tears down the mesh without first draining\nthese sessions.\n\nA running sender thread or a late incoming tp_meter packet can then keep\nprocessing against a mesh instance which is already shutting down.\nSynchronize tp_meter with the mesh lifetime by stopping all active\nsessions from batadv_mesh_free() and waiting for sender threads to exit\nbefore teardown continues."
    }
  ],
  "id": "CVE-2026-46208",
  "lastModified": "2026-06-19T13:16:35.580",
  "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"
        },
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        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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  "published": "2026-05-28T10:16:36.457",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "NVD-CWE-noinfo"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-46208 (GCVE-0-2026-46208)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-08-05 12:30

Title

batman-adv: stop tp_meter sessions during mesh teardown

Summary

Severity

7.8 (High)


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

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/5e7d0ac936354c368…
https://git.kernel.org/stable/c/268078acae72daa12…
https://git.kernel.org/stable/c/58943b7ea35629474…
https://git.kernel.org/stable/c/79bc0eaeef2c57973…
https://git.kernel.org/stable/c/26dfeee8db81354bf…
https://git.kernel.org/stable/c/03660dab86f933191…
https://git.kernel.org/stable/c/8634c1dbd73adb74d…
https://git.kernel.org/stable/c/3d3cf6a7314aca4df…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 5e7d0ac936354c36810e74ac3056b334ed1f4058 (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 268078acae72daa12b17b2b299701cb9924e469a (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 58943b7ea356294749dae3e75b96c0ee292c00be (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 79bc0eaeef2c5797317bf2da8e3159a74d62ec47 (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 26dfeee8db81354bfdade155f27f9e16510ad196 (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 03660dab86f93319178a24667f6998526dc4355d (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 8634c1dbd73adb74d40533ebb7e914efb82e71fb (git) Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 3d3cf6a7314aca4df0a6dde28ce784a2a30d0166 (git)
Linux	Linux	Affected: 4.8 Unaffected: 0 , < 4.8 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.90 , ≤ 6.12.* (semver) Unaffected: 6.18.32 , ≤ 6.18.* (semver) Unaffected: 7.0.9 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/batman-adv/main.c",
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            "net/batman-adv/types.h"
          ],
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: stop tp_meter sessions during mesh teardown\n\nTP meter sessions remain linked on bat_priv-\u003etp_list after the netlink\nrequest has already finished. When the mesh interface is removed,\nbatadv_mesh_free() currently tears down the mesh without first draining\nthese sessions.\n\nA running sender thread or a late incoming tp_meter packet can then keep\nprocessing against a mesh instance which is already shutting down.\nSynchronize tp_meter with the mesh lifetime by stopping all active\nsessions from batadv_mesh_free() and waiting for sender threads to exit\nbefore teardown continues."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The controllable trigger is the local `BATADV_CMD_TP_METER` netlink command plus local interface teardown (rtnetlink); the \"late packet\" receiver path is not remotely controllable since the remote peer cannot drive the victim\u0027s teardown timing.\nAC:L - The attacker controls both sides of the race\u2014starting a session with an attacker-chosen `test_length` (default 10s) keeps the sender thread/receiver timer alive, then removing the interface triggers the free\u2014giving a large, reliably winnable window.\nPR:L - The tp_meter netlink op is `GENL_UNS_ADMIN_PERM`, i.e. CAP_NET_ADMIN checked against the netns owner\u0027s user namespace, which an unprivileged user obtains via `unshare -Urn`.\nUI:N - Both the session start and the mesh teardown are performed by the attacker; no victim interaction is required.\nS:U - The corruption stays within the kernel\u0027s own memory/security authority with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Use-after-free on the netdev private data lets the attacker control freed-object contents and read adjacent/reallocated kernel memory.\nI:H - The freed `bat_priv` object can be reclaimed via heap spraying, yielding a write/control-flow-hijack primitive from the still-running sender thread and receiver timer.\nA:H - The use-after-free reliably causes a kernel oops/panic when the stale `bat_priv` and mesh tables are dereferenced after `free_netdev()`."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:30:29.443Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5e7d0ac936354c36810e74ac3056b334ed1f4058"
        },
        {
          "url": "https://git.kernel.org/stable/c/268078acae72daa12b17b2b299701cb9924e469a"
        },
        {
          "url": "https://git.kernel.org/stable/c/58943b7ea356294749dae3e75b96c0ee292c00be"
        },
        {
          "url": "https://git.kernel.org/stable/c/79bc0eaeef2c5797317bf2da8e3159a74d62ec47"
        },
        {
          "url": "https://git.kernel.org/stable/c/26dfeee8db81354bfdade155f27f9e16510ad196"
        },
        {
          "url": "https://git.kernel.org/stable/c/03660dab86f93319178a24667f6998526dc4355d"
        },
        {
          "url": "https://git.kernel.org/stable/c/8634c1dbd73adb74d40533ebb7e914efb82e71fb"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d3cf6a7314aca4df0a6dde28ce784a2a30d0166"
        }
      ],
      "title": "batman-adv: stop tp_meter sessions during mesh teardown",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46208",
    "datePublished": "2026-05-28T09:40:26.341Z",
    "dateReserved": "2026-05-13T15:03:33.105Z",
    "dateUpdated": "2026-08-05T12:30:29.443Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2026-46208

CVE-2026-46208 (GCVE-0-2026-46208)

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