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
References
Impacted products
Vendor Product Version
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)
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)
Create a notification for this product.
Show details on NVD website
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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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            "tags": [
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          },
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              "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": "2026-10-01T01:19:01Z",
      "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": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43382",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43382.json",
      "version": "9"
    }
  }
}



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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

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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.



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.