CVE-2026-46212 (GCVE-0-2026-46212)
Vulnerability from cvelistv5
Published
2026-05-28 09:40
Modified
2026-06-14 18:03
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.
Impacted products
Vendor Product Version
Linux Linux Version: 23721387c409087fd3b97e274f34d3ddc0970b74
Version: 23721387c409087fd3b97e274f34d3ddc0970b74
Version: 23721387c409087fd3b97e274f34d3ddc0970b74
Version: 23721387c409087fd3b97e274f34d3ddc0970b74
Version: 23721387c409087fd3b97e274f34d3ddc0970b74
Version: 23721387c409087fd3b97e274f34d3ddc0970b74
Version: 23721387c409087fd3b97e274f34d3ddc0970b74
Version: 23721387c409087fd3b97e274f34d3ddc0970b74
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{
  "containers": {
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          "programFiles": [
            "net/batman-adv/bridge_loop_avoidance.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "3.5"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
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            },
            {
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              "version": "5.15.209",
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            },
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
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              "status": "unaffected",
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "3.5",
                  "vulnerable": true
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: bla: prevent use-after-free when deleting claims\n\nWhen batadv_bla_del_backbone_claims() removes all claims for a backbone, it\ndoes this by dropping the link entry in the hash list. This list entry\nitself was one of the references which need to be dropped at the same time\nvia batadv_claim_put().\n\nBut the batadv_claim_put() must not be done before the last access to the\nclaim object in this function. Otherwise the claim might be freed already\nby the batadv_claim_release() function before the list entry was dropped."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T18:03:07.022Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1d4b241482d9025c537afb3c7c8419c72c0e0c82"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1a99837bb6169cfb9187abaa2005e8f12079426"
        },
        {
          "url": "https://git.kernel.org/stable/c/b88c865dcf6e9f20bfe66a360d4b62941ef769b8"
        },
        {
          "url": "https://git.kernel.org/stable/c/368449e467d5f1e2c2e987bf2bd57000ba75e10b"
        },
        {
          "url": "https://git.kernel.org/stable/c/6c5dc6d68e6ba7f0224a757a39ed52fcdb54d472"
        },
        {
          "url": "https://git.kernel.org/stable/c/00155f336a5e8b1006d2ca9ae7ad8fc4a44bb401"
        },
        {
          "url": "https://git.kernel.org/stable/c/0cc9847c64cb6e61118bc78c9187c8209a7197fa"
        },
        {
          "url": "https://git.kernel.org/stable/c/4ae1709a314060a196981b344610d023ea841e57"
        }
      ],
      "title": "batman-adv: bla: prevent use-after-free when deleting claims",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46212",
    "datePublished": "2026-05-28T09:40:29.712Z",
    "dateReserved": "2026-05-13T15:03:33.105Z",
    "dateUpdated": "2026-06-14T18:03:07.022Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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