CVE-2026-46212 (GCVE-0-2026-46212)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-08-05 12:30
VLAI
Title
batman-adv: bla: prevent use-after-free when deleting claims
Summary
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: prevent use-after-free when deleting claims When batadv_bla_del_backbone_claims() removes all claims for a backbone, it does this by dropping the link entry in the hash list. This list entry itself was one of the references which need to be dropped at the same time via batadv_claim_put(). But the batadv_claim_put() must not be done before the last access to the claim object in this function. Otherwise the claim might be freed already by the batadv_claim_release() function before the list entry was dropped.
Assigner
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 1d4b241482d9025c537afb3c7c8419c72c0e0c82 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < a1a99837bb6169cfb9187abaa2005e8f12079426 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < b88c865dcf6e9f20bfe66a360d4b62941ef769b8 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 368449e467d5f1e2c2e987bf2bd57000ba75e10b (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 0cc9847c64cb6e61118bc78c9187c8209a7197fa (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 4ae1709a314060a196981b344610d023ea841e57 (git)
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Linux Linux Affected: 3.5
Unaffected: 0 , < 3.5 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 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)
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Show details on NVD website

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      "source": "Microsoft CSAF VEX",
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      "title": "batman-adv: bla: prevent use-after-free when deleting claims",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46212.json",
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:41:32+00:00",
      "cve": "CVE-2026-46212",
      "id": "CVE-2026-46212",
      "initial_release_date": "2026-05-28T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: batman-adv: bla: prevent use-after-free when deleting claims",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46212.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-21T23:54:15Z",
      "cve": "CVE-2026-46212",
      "id": "CVE-2026-46212",
      "initial_release_date": "2026-05-29T01:15:02Z",
      "product_status:known_affected": "205",
      "product_status:known_not_affected": "33",
      "product_status:recommended": "102",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46212",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46212.json",
      "version": "6"
    }
  }
}



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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.

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Detection rules are retrieved from Rulezet.

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