CVE-2026-72113 (GCVE-0-2026-72113)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:52 – Updated: 2026-10-16 18:44
VLAI
Title
can: bcm: add missing device refcount for CAN filter removal
Summary
In the Linux kernel, the following vulnerability has been resolved: can: bcm: add missing device refcount for CAN filter removal sashiko-bot remarked a problem with a concurrent device unregistration in isotp.c which also is present in the bcm.c code. A former fix for raw.c commit c275a176e4b6 ("can: raw: add missing refcount for memory leak fix") introduced a netdevice_tracker which solves the issue for bcm.c too. bcm_release(), bcm_delete_rx_op() and bcm_notifier() relied on dev_get_by_index(ifindex) to re-find the device for an rx_op before unregistering its filter. If a concurrent NETDEV_UNREGISTER has already unlisted the device from the ifindex table, that lookup fails and can_rx_unregister() is silently skipped, leaving a stale CAN filter pointing at the soon-to-be-freed bcm_op/socket. Hold a netdev_hold()/netdev_put() tracked reference on op->rx_reg_dev from the moment the rx filter is registered in bcm_rx_setup() until it is unregistered in bcm_rx_unreg(), and use that reference directly in bcm_release() and bcm_delete_rx_op() instead of re-looking the device up by ifindex.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 18:41 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < bd5232663524e94cc5aad861dca11e3db8e2ab6f (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < ee8b36d0faca08f35b889b6e9aa850695e5b8ba9 (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < dcaee869913c7210cd47ed0a8f27349d7bdcdb7b (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < 84aa4807816e405c1bf87114fc63e06d244281ef (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < 633bda66fbf309f5de5e1ad6defe8e6b1d77a20f (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < b024c21c9066f6957b7d4a8f2037e4b000c5e041 (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < 04d23061bbf18d5d81022eb21e9d32e99d24468d (git)
Affected: ffd980f976e7fd666c2e61bf8ab35107efd11828 , < d59948293ea34b6337ce2b5febab8510de70048c (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.25
Unaffected: 0 , < 2.6.25 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: add missing device refcount for CAN filter removal\n\nsashiko-bot remarked a problem with a concurrent device unregistration\nin isotp.c which also is present in the bcm.c code. A former fix for raw.c\ncommit c275a176e4b6 (\"can: raw: add missing refcount for memory leak fix\")\nintroduced a netdevice_tracker which solves the issue for bcm.c too.\n\nbcm_release(), bcm_delete_rx_op() and bcm_notifier() relied on\ndev_get_by_index(ifindex) to re-find the device for an rx_op before\nunregistering its filter. If a concurrent NETDEV_UNREGISTER has already\nunlisted the device from the ifindex table, that lookup fails and\ncan_rx_unregister() is silently skipped, leaving a stale CAN filter\npointing at the soon-to-be-freed bcm_op/socket.\n\nHold a netdev_hold()/netdev_put() tracked reference on op-\u003erx_reg_dev\nfrom the moment the rx filter is registered in bcm_rx_setup() until it\nis unregistered in bcm_rx_unreg(), and use that reference directly in\nbcm_release() and bcm_delete_rx_op() instead of re-looking the device\nup by ifindex."
          }
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        "id": "CVE-2026-72113",
        "lastModified": "2026-10-16T19:17:08.707",
        "metrics": {
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                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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                "options": [
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                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T18:41:41.918613Z",
                "version": "2.0.3"
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        "published": "2026-08-15T06:21:25.680",
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          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/84aa4807816e405c1bf87114fc63e06d244281ef"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b024c21c9066f6957b7d4a8f2037e4b000c5e041"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/bd5232663524e94cc5aad861dca11e3db8e2ab6f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/d59948293ea34b6337ce2b5febab8510de70048c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/dcaee869913c7210cd47ed0a8f27349d7bdcdb7b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ee8b36d0faca08f35b889b6e9aa850695e5b8ba9"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-26T11:08:52+00:00",
      "cve": "CVE-2026-72113",
      "id": "CVE-2026-72113",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "276",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: can: bcm: add missing device refcount for CAN filter removal",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72113.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-15T14:39:18Z",
      "cve": "CVE-2026-72113",
      "id": "CVE-2026-72113",
      "initial_release_date": "2026-08-28T01:00:48Z",
      "product_status:known_affected": "0",
      "product_status:known_not_affected": "363",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-72113",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-72113.json",
      "version": "6"
    }
  }
}



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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    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.