CVE-2026-23362 (GCVE-0-2026-23362)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-05-23 16:04
VLAI
Title
can: bcm: fix locking for bcm_op runtime updates
Summary
In the Linux kernel, the following vulnerability has been resolved: can: bcm: fix locking for bcm_op runtime updates Commit c2aba69d0c36 ("can: bcm: add locking for bcm_op runtime updates") added a locking for some variables that can be modified at runtime when updating the sending bcm_op with a new TX_SETUP command in bcm_tx_setup(). Usually the RX_SETUP only handles and filters incoming traffic with one exception: When the RX_RTR_FRAME flag is set a predefined CAN frame is sent when a specific RTR frame is received. Therefore the rx bcm_op uses bcm_can_tx() which uses the bcm_tx_lock that was only initialized in bcm_tx_setup(). Add the missing spin_lock_init() when allocating the bcm_op in bcm_rx_setup() to handle the RTR case properly.
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: 7595de7bc56e0e52b74e56c90f7e247bf626d628 , < 0904037e713f787d1376e1d349c3bdf6c3105881 (git)
Affected: fbd8fdc2b218e979cfe422b139b8f74c12419d1f , < c85b96eaf766d8f066b1139a17a51efa2f6627ef (git)
Affected: 2a437b86ac5a9893c902f30ef66815bf13587bf6 , < 800f26f11ae37b17f58e0001f28a47dd75c26557 (git)
Affected: 76c84c3728178b2d38d5604e399dfe8b0752645e , < 70e951afad4c025261fe3c952d2b07237e320a01 (git)
Affected: cc55dd28c20a6611e30596019b3b2f636819a4c0 , < 8bcf2d847adb82b2c617456f6da17ac5e6c75285 (git)
Affected: c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 , < 8215ba7bc99e84e66fd6938874ec4330a9d96518 (git)
Affected: c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 , < f0c349b2c21b220af5ba19f29b885e222958d796 (git)
Affected: c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 , < c35636e91e392e1540949bbc67932167cb48bc3a (git)
Affected: 8f1c022541bf5a923c8d6fa483112c15250f30a4 (git)
Affected: c4e8a172501e677ebd8ea9d9161d97dc4df56fbd (git)
Affected: 5.10.238 , < 5.10.253 (semver)
Affected: 5.15.185 , < 5.15.203 (semver)
Affected: 6.1.141 , < 6.1.167 (semver)
Affected: 6.6.93 , < 6.6.130 (semver)
Affected: 6.12.31 , < 6.12.77 (semver)
Affected: 5.4.294 , < 5.5 (semver)
Affected: 6.14.9 , < 6.15 (semver)
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Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (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: 6.12.77 , ≤ 6.12.* (semver)
Unaffected: 6.18.17 , ≤ 6.18.* (semver)
Unaffected: 6.19.7 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: fix locking for bcm_op runtime updates\n\nCommit c2aba69d0c36 (\"can: bcm: add locking for bcm_op runtime updates\")\nadded a locking for some variables that can be modified at runtime when\nupdating the sending bcm_op with a new TX_SETUP command in bcm_tx_setup().\n\nUsually the RX_SETUP only handles and filters incoming traffic with one\nexception: When the RX_RTR_FRAME flag is set a predefined CAN frame is\nsent when a specific RTR frame is received. Therefore the rx bcm_op uses\nbcm_can_tx() which uses the bcm_tx_lock that was only initialized in\nbcm_tx_setup(). Add the missing spin_lock_init() when allocating the\nbcm_op in bcm_rx_setup() to handle the RTR case properly."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncan: bcm: corregir el bloqueo para las actualizaciones en tiempo de ejecuci\u00f3n de bcm_op\n\nEl commit c2aba69d0c36 (\u0027can: bcm: a\u00f1adir bloqueo para las actualizaciones en tiempo de ejecuci\u00f3n de bcm_op\u0027) a\u00f1adi\u00f3 un bloqueo para algunas variables que pueden ser modificadas en tiempo de ejecuci\u00f3n al actualizar el bcm_op de env\u00edo con un nuevo comando TX_SETUP en bcm_tx_setup().\n\nNormalmente, el RX_SETUP solo maneja y filtra el tr\u00e1fico entrante con una excepci\u00f3n: Cuando la bandera RX_RTR_FRAME est\u00e1 establecida, se env\u00eda una trama CAN predefinida cuando se recibe una trama RTR espec\u00edfica. Por lo tanto, el bcm_op de rx usa bcm_can_tx() que usa el bcm_tx_lock que solo fue inicializado en bcm_tx_setup(). A\u00f1adir el spin_lock_init() faltante al asignar el bcm_op en bcm_rx_setup() para manejar el caso RTR correctamente."
          }
        ],
        "id": "CVE-2026-23362",
        "lastModified": "2026-06-17T10:21:25.897",
        "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": "2026-03-25T11:16:35.220",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0904037e713f787d1376e1d349c3bdf6c3105881"
          },
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            "tags": [
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            "url": "https://git.kernel.org/stable/c/800f26f11ae37b17f58e0001f28a47dd75c26557"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
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          {
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          },
          {
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              "Patch"
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            "url": "https://git.kernel.org/stable/c/f0c349b2c21b220af5ba19f29b885e222958d796"
          }
        ],
        "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": "Moderate",
      "current_release_date": "2026-06-28T07:20:29+00:00",
      "cve": "CVE-2026-23362",
      "id": "CVE-2026-23362",
      "initial_release_date": "2026-03-25T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: can: bcm: fix locking for bcm_op runtime updates",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23362.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-15T05:29:34Z",
      "cve": "CVE-2026-23362",
      "id": "CVE-2026-23362",
      "initial_release_date": "2026-03-25T16:55:31Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "443",
      "product_status:known_not_affected": "192",
      "product_status:recommended": "291",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23362",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23362.json",
      "version": "18"
    }
  }
}



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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.