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CVE-2026-46233 (GCVE-0-2026-46233)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:40 – Updated: 2026-06-14 18:04
VLAI
Title
batman-adv: bla: only purge non-released claims
Summary
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: only purge non-released claims When batadv_bla_purge_claims() goes through the list of claims, it is only traversing the hash list with an rcu_read_lock(). Due to a potential parallel batadv_claim_put(), it can happen that it encounters a claim which was actually in the process of being released+freed by batadv_claim_release(). In this case, backbone_gw is set to NULL before the delayed RCU kfree is started. Calling batadv_bla_claim_get_backbone_gw() is then no longer allowed because it would cause a NULL-ptr derefence. To avoid this, only claims with a valid reference counter must be purged. All others are already taken care of.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 6725c523a35eeca611ff37e7d4a8712fae92aefd (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < afb5436f6028fd68f408f189230fbaa19c910d72 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 7b8fbcee3184d848b5aee085ca16d0cf05c9b641 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < 7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < b65365d2b1e6095c538d49baeb140dd1c166c1b3 (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d (git)
Affected: 23721387c409087fd3b97e274f34d3ddc0970b74 , < cf6b604011591865ae39ac82de8978c1120d17af (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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            "url": "https://git.kernel.org/stable/c/7b8fbcee3184d848b5aee085ca16d0cf05c9b641"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/afb5436f6028fd68f408f189230fbaa19c910d72"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/b65365d2b1e6095c538d49baeb140dd1c166c1b3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/cf6b604011591865ae39ac82de8978c1120d17af"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:41:41+00:00",
      "cve": "CVE-2026-46233",
      "id": "CVE-2026-46233",
      "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: only purge non-released claims",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46233.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:10:54Z",
      "cve": "CVE-2026-46233",
      "id": "CVE-2026-46233",
      "initial_release_date": "2026-05-29T01:14:38Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "699",
      "product_status:known_not_affected": "21",
      "product_status:recommended": "254",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46233",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46233.json",
      "version": "11"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.