can: bcm: track a single source interface for ANYDEV timeout/throttle ops

{
  "id": "70bd75b9ce13c2171941680f9ec40593e2d30c4c608fb35548bc6c36ac72d468",
  "url": "https://osv.dev/vulnerability/CVE-2026-72115",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "can: bcm: track a single source interface for ANYDEV timeout/throttle ops",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: can: bcm: track a single source interface for ANYDEV timeout/throttle ops An ANYDEV rx op (ifindex == 0) with an active RX timeout and/or throttle timer has no defined semantics when matching frames arrive from several interfaces: bcm_rx_handler() can run concurrently for the same op on different CPUs, racing hrtimer_cancel()/ bcm_rx_starttimer() against bcm_rx_timeout_handler() and causing spurious RX_TIMEOUT notifications and last_frames corruption. The same concurrency lets throttled multiplex frames from different interfaces clobber the single rx_ifindex/rx_stamp fields shared by the op. Add op->if_detected to track the first interface that delivers a matching frame while a timeout/throttle timer is configured, and reject frames from any other interface for that op. The claim is decided in bcm_rx_handler() before hrtimer_cancel() touches op->timer, so a rejected frame can never disturb the claimed interface's watchdog. RTR-mode ops are excluded via RX_RTR_FRAME, independent of kt_ival1/kt_ival2, since those may briefly hold a stale value from an earlier non-RTR configuration. The claim is released in bcm_notify() on NETDEV_UNREGISTER and in bcm_rx_setup() when SETTIMER reconfigures the timer values. A (re-)claim is only possible on CAN devices in NETREG_REGISTERED dev->reg_state to cover the release in bcm_notify() where reg_state becomes NETREG_UNREGISTERING until synchronize_net().",
    "evidence": "osv:CVE-2026-72115",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.265",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.216",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.183",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.148",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.101",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.42",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-72115",
      "aliases": [
        "CVE-2026-72115"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
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              "type": "GIT",
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                  "fixed": "f147f48837cb1426521f5b3c3b3134c71128a25d"
                },
                {
                  "fixed": "57cf104da4cf450ae9c16801a3164604b801d2cc"
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                {
                  "fixed": "03dfe347c398fa41a7e30e8dc538f12568c183e6"
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                  "fixed": "18b45251e74e35668f0dd0c470549384ae191ecf"
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                  "fixed": "2f5976f54a04e9f18b25283036ac3136be453b17"
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72115.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.25"
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                {
                  "fixed": "5.10.265"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72115.json"
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      ],
      "modified": "2026-10-28T02:30:27.102736112Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/03dfe347c398fa41a7e30e8dc538f12568c183e6",
        "https://git.kernel.org/stable/c/18b45251e74e35668f0dd0c470549384ae191ecf",
        "https://git.kernel.org/stable/c/2f5976f54a04e9f18b25283036ac3136be453b17",
        "https://git.kernel.org/stable/c/3ff8c24b421070a2db99a5cdb86edc9ff339418e",
        "https://git.kernel.org/stable/c/57cf104da4cf450ae9c16801a3164604b801d2cc",
        "https://git.kernel.org/stable/c/b6317022b685a430a3ae420456716e3c0c02ef4b",
        "https://git.kernel.org/stable/c/eca8b44d51fc6ab61022258ec968e55e3073b79e",
        "https://git.kernel.org/stable/c/f147f48837cb1426521f5b3c3b3134c71128a25d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72115.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72115",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72115.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72115",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493932,
  "published_at": "2026-08-15T05:52:55.524+00:00"
}