CVE-2026-52931 (GCVE-0-2026-52931)

Vulnerability from cvelistv5 – Published: 2026-06-24 07:14 – Updated: 2026-06-28 06:36
VLAI
Title
batman-adv: tp_meter: avoid use of uninit sender vars
Summary
In the Linux kernel, the following vulnerability has been resolved: batman-adv: tp_meter: avoid use of uninit sender vars batadv_tp_recv_ack() and batadv_tp_stop() are only valid for tp_vars in the BATADV_TP_SENDER role. When called with a BATADV_TP_RECEIVER role, it proceeds to read sender-only members that were never initialized, leading to undefined behavior. This can be triggered when a node that is currently acting as a receiver in an ongoing tp_meter session receives a malicious ACK packet. Guard against this by checking tp_vars->role immediately after the lookup and bailing out if it is not BATADV_TP_SENDER, before any of those members are accessed.
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
Linux Linux Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 0e388af04b3958b178a1b979527f93eb46ea1fee (git)
Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 1a21c055f66e78973712a4a1be2a554f1ee2e4f4 (git)
Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 9884c9c02d3c90e9215db3c5128f59045d20ae91 (git)
Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 53f931e0146ae5bdab4cba302646827d06b3794b (git)
Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < ecdaa3e4d91040206afe21bc8a0d1198a0971ff3 (git)
Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < dc2ae5fbd2dadc26735092f140b246841d969a11 (git)
Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 85397e48afe6be83ffca5ad3f4792296bfc81d3d (git)
Affected: 33a3bb4a3345bb511f9c69c913da95d4693e2a4e , < 6c65cf23d4c6170fcf5714c32aa64689718cb142 (git)
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Linux Linux Affected: 4.8
Unaffected: 0 , < 4.8 (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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{
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    "cveId": "CVE-2026-52931",
    "datePublished": "2026-06-24T07:14:23.349Z",
    "dateReserved": "2026-06-09T07:44:35.369Z",
    "dateUpdated": "2026-06-28T06:36:51.143Z",
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  }
}


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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.