CVE-2026-64094 (GCVE-0-2026-64094)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-19 15:40
VLAI
Title
batman-adv: bla: avoid NULL-ptr deref for claim via dropped interface
Summary
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: avoid NULL-ptr deref for claim via dropped interface Without rtnl_lock held, a hardif might be retrieved as primary interface of a meshif, but then (while operating on this interface) getting decoupled from the mesh interface. In this case, the meshif still exists but the pointer from the primary hardif to the meshif is set to NULL. The mesh_iface must be checked first to be non-NULL before continuing to send an ARP request using meshif.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 53cb3511f6eda37d3bd923545fdba6013b6d7bb7 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < efb62458c94db1fe3a287e7e89c31b0cfb03f938 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 2a8c9e86529156c62d9187b9ed9454c31665ad33 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 0f3ebd7bb417aabc44853cc7c2a184ebb0e05b45 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 6921a7683ae9ad0208d829e71f725a9e25ccff49 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 555b8d3f5c313d81d46274fd0976352dafc80124 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < f80d3d98d2ff78d9e2fe5d68b1f45948c4f7bd24 (git)
Create a notification for this product.
Linux Linux Affected: 3.5
Unaffected: 0 , < 3.5 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.93 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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            "net/batman-adv/bridge_loop_avoidance.c"
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          "vendor": "Linux",
          "versions": [
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            },
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              "version": "7.1",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: bla: avoid NULL-ptr deref for claim via dropped interface\n\nWithout rtnl_lock held, a hardif might be retrieved as primary interface of\na meshif, but then (while operating on this interface) getting decoupled\nfrom the mesh interface. In this case, the meshif still exists but the\npointer from the primary hardif to the meshif is set to NULL.\n\nThe mesh_iface must be checked first to be non-NULL before continuing to\nsend an ARP request using meshif."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T15:40:01.772Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/4f6266735a0ba6a568b6d4c9fa51c33a5a7f2d70"
        },
        {
          "url": "https://git.kernel.org/stable/c/53cb3511f6eda37d3bd923545fdba6013b6d7bb7"
        },
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          "url": "https://git.kernel.org/stable/c/efb62458c94db1fe3a287e7e89c31b0cfb03f938"
        },
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          "url": "https://git.kernel.org/stable/c/2a8c9e86529156c62d9187b9ed9454c31665ad33"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64094",
    "datePublished": "2026-07-19T15:40:01.772Z",
    "dateReserved": "2026-07-19T07:54:57.032Z",
    "dateUpdated": "2026-07-19T15:40:01.772Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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      "date": "2026-07-21",
      "epss": "0.0021",
      "percentile": "0.11354"
    },
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-07-21T08:08:03+00:00",
      "cve": "CVE-2026-64094",
      "id": "CVE-2026-64094",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "1",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: batman-adv: bla: avoid NULL-ptr deref for claim via dropped interface",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64094.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.