CVE-2026-43382 (GCVE-0-2026-43382)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-23 16:06
VLAI
Title
batman-adv: Avoid double-rtnl_lock ELP metric worker
Summary
In the Linux kernel, the following vulnerability has been resolved: batman-adv: Avoid double-rtnl_lock ELP metric worker batadv_v_elp_get_throughput() might be called when the RTNL lock is already held. This could be problematic when the work queue item is cancelled via cancel_delayed_work_sync() in batadv_v_elp_iface_disable(). In this case, an rtnl_lock() would cause a deadlock. To avoid this, rtnl_trylock() was used in this function to skip the retrieval of the ethtool information in case the RTNL lock was already held. But for cfg80211 interfaces, batadv_get_real_netdev() was called - which also uses rtnl_lock(). The approach for __ethtool_get_link_ksettings() must also be used instead and the lockless version __batadv_get_real_netdev() has to be called.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a0019971f340ae02ba54cf1861f72da7e03e6b66 , < 4c3ae249431b4fcb315d7dfb4c3a13f9e443fd9b (git)
Affected: 3c0e0aecb78cb2a2ca1dc701982d08fedb088dc6 , < 192f40ad8a7dac58dae9199a065dbf7e6e67b75b (git)
Affected: 781a06fd265a8151f7601122d9c2e985663828ff , < fa7b4edfbabdf9235b0ab4bea297fc12b3bec9ca (git)
Affected: a7aa2317285806640c844acd4cd2cd768e395264 , < f3ca45673dab0514a887231de6f3243a699d5bfd (git)
Affected: 0fdc3c166ac17b26014313fa2b93696354511b24 , < b7e5d8ddfdf1d6e9e0808d1adf7736a107372d77 (git)
Affected: 8c8ecc98f5c65947b0070a24bac11e12e47cc65d , < 2ab9f2531d37775cd79228c1f5d80e6bd08d11d3 (git)
Affected: 8c8ecc98f5c65947b0070a24bac11e12e47cc65d , < 77808fe7d03ad0062840b95f431869a8b3d88b24 (git)
Affected: 8c8ecc98f5c65947b0070a24bac11e12e47cc65d , < cfc83a3c71517b59c1047db57da31e26a9dc2f33 (git)
Affected: 1c334629176c2d644befc31a20d4bf75542f7631 (git)
Affected: af264c2a9adc37f4bdf88ca7f3affa15d8c7de9e (git)
Affected: 5.10.235 , < 5.10.253 (semver)
Affected: 5.15.179 , < 5.15.203 (semver)
Affected: 6.1.129 , < 6.1.167 (semver)
Affected: 6.6.79 , < 6.6.130 (semver)
Affected: 6.12.16 , < 6.12.78 (semver)
Affected: 5.4.291 , < 5.5 (semver)
Affected: 6.13.4 , < 6.14 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.14
Unaffected: 0 , < 6.14 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.19 , ≤ 6.18.* (semver)
Unaffected: 6.19.9 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                "negate": false,
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            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: Avoid double-rtnl_lock ELP metric worker\n\nbatadv_v_elp_get_throughput() might be called when the RTNL lock is already\nheld. This could be problematic when the work queue item is cancelled via\ncancel_delayed_work_sync() in batadv_v_elp_iface_disable(). In this case,\nan rtnl_lock() would cause a deadlock.\n\nTo avoid this, rtnl_trylock() was used in this function to skip the\nretrieval of the ethtool information in case the RTNL lock was already\nheld.\n\nBut for cfg80211 interfaces, batadv_get_real_netdev() was called - which\nalso uses rtnl_lock(). The approach for __ethtool_get_link_ksettings() must\nalso be used instead and the lockless version __batadv_get_real_netdev()\nhas to be called."
          }
        ],
        "id": "CVE-2026-43382",
        "lastModified": "2026-06-17T10:49:29.617",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-05-08T15:16:49.463",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/192f40ad8a7dac58dae9199a065dbf7e6e67b75b"
          },
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            "tags": [
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          },
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          },
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            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/cfc83a3c71517b59c1047db57da31e26a9dc2f33"
          },
          {
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          },
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            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/fa7b4edfbabdf9235b0ab4bea297fc12b3bec9ca"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-667"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:37:15+00:00",
      "cve": "CVE-2026-43382",
      "id": "CVE-2026-43382",
      "initial_release_date": "2026-05-08T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: batman-adv: Avoid double-rtnl_lock ELP metric worker",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43382.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-17T00:34:11Z",
      "cve": "CVE-2026-43382",
      "id": "CVE-2026-43382",
      "initial_release_date": "2026-05-13T03:34:37Z",
      "product_status:known_affected": "426",
      "product_status:known_not_affected": "294",
      "product_status:recommended": "308",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43382",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-43382.json",
      "version": "10"
    }
  }
}



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Sightings

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Nomenclature

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