CVE-2026-64090 (GCVE-0-2026-64090)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-07-19 15:39
VLAI
Title
batman-adv: tt: avoid empty VLAN responses
Summary
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tt: avoid empty VLAN responses The commit 16116dac2339 ("batman-adv: prevent TT request storms by not sending inconsistent TT TLVLs") added checks to the local (direct) TT response code. But the response can also be done indirectly by another node using the global TT state. To avoid such inconsistency states reported in the original fix, also avoid sending empty VLANs for replies from the global TT state.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b , < 1f467d9a095211d3f77e8ff1bee90e73ffe01c64 (git)
Affected: 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b , < 9a02c8fc963ddeecb5d8788be0740c1869fc54b7 (git)
Affected: 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b , < ea4f757641430bcc8322772e161453c4db5ecb64 (git)
Affected: 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b , < 99f17d1cdb371cbd037975239b321f346d38f6d2 (git)
Affected: 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b , < cfb30645280a2131e46cbd1b9a38cfd3ff893f12 (git)
Affected: 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b , < b93ca6012712ecab2b551e120d7c95038d6a89e5 (git)
Affected: 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b , < ab26e346322648f5c39de017d9723c9256284fce (git)
Affected: 7ea7b4a142758deaf46c1af0ca9ceca6dd55138b , < fa1bd704940b5bcbc32c0b28db9167405c8ee5e0 (git)
Create a notification for this product.
Linux Linux Affected: 3.13
Unaffected: 0 , < 3.13 (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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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tt: avoid empty VLAN responses\n\nThe commit 16116dac2339 (\"batman-adv: prevent TT request storms by not\nsending inconsistent TT TLVLs\") added checks to the local (direct) TT\nresponse code. But the response can also be done indirectly by another node\nusing the global TT state. To avoid such inconsistency states reported in\nthe original fix, also avoid sending empty VLANs for replies from the\nglobal TT state."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-19T15:39:59.392Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-07-19T15:39:59.392Z",
    "dateReserved": "2026-07-19T07:54:57.032Z",
    "dateUpdated": "2026-07-19T15:39:59.392Z",
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-07-21T09:07:53+00:00",
      "cve": "CVE-2026-64090",
      "id": "CVE-2026-64090",
      "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: tt: avoid empty VLAN responses",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64090.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.