CVE-2026-52914 (GCVE-0-2026-52914)

Vulnerability from cvelistv5 – Published: 2026-06-24 07:14 – Updated: 2026-08-05 12:31
VLAI
Title
batman-adv: fix fragment reassembly length accounting
Summary
In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix fragment reassembly length accounting batman-adv keeps a running payload length for queued fragments and uses it to validate a fragment chain before reassembly. That accounting currently allows the accumulated fragment length to be truncated during updates. As a result, malformed fragment chains can bypass the intended validation and drive reassembly with inconsistent length state, leading to a local denial of service. Fix the accounting by storing the accumulated length in a length-typed field and rejecting update overflows before the existing validation logic runs. The fix was verified against the original reproducer and against valid fragment reassembly paths.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 610bfc6bc99bc83680d190ebc69359a05fc7f605 , < e4f3f6b818aa6a678bc54a2d4e0bece2303c6a64 (git)
Affected: 610bfc6bc99bc83680d190ebc69359a05fc7f605 , < 37be61825b15534a16ff9cfc9546de155b6df982 (git)
Affected: 610bfc6bc99bc83680d190ebc69359a05fc7f605 , < 975563c5de1123dde1ec7946bf5556d20c89d74e (git)
Affected: 610bfc6bc99bc83680d190ebc69359a05fc7f605 , < f653b040dad1af70fa5cd4fe085e4758925480c9 (git)
Affected: 610bfc6bc99bc83680d190ebc69359a05fc7f605 , < e910dbf509125fe51ad68e4fa74dc8ab0a8e787a (git)
Affected: 610bfc6bc99bc83680d190ebc69359a05fc7f605 , < 3eb8bcb823391bd58997831b3c9c152a4ba8e255 (git)
Affected: 610bfc6bc99bc83680d190ebc69359a05fc7f605 , < fdb2c96efb2baeb3725e9ce3ede8f1e36f5490f0 (git)
Affected: 610bfc6bc99bc83680d190ebc69359a05fc7f605 , < 9cd3f16c320bfdadd4509358122368deb56a5741 (git)
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Linux Linux Affected: 3.13
Unaffected: 0 , < 3.13 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.142 , ≤ 6.6.* (semver)
Unaffected: 6.12.92 , ≤ 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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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T11:08:42+00:00",
      "cve": "CVE-2026-52914",
      "id": "CVE-2026-52914",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: batman-adv: fix fragment reassembly length accounting",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52914.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





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.