bna: prevent IOC timer rearm during teardown

{
  "id": "9c21558c57b6f45d0d5daf43beabbe9d691a88be9ca3bffc0d2f77abbe8fbf13",
  "url": "https://osv.dev/vulnerability/CVE-2026-98544",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bna: prevent IOC timer rearm during teardown",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bna: prevent IOC timer rearm during teardown bna: prevent IOC timer rearm during teardown bnad_pci_remove() and the probe disable_ioceth path call timer_delete_sync() for ioc_timer, sem_timer and hb_timer, but not for iocpf_timer. bnad_iocpf_timeout() then takes bnad->bna_lock after free_netdev() has freed the struct bnad. Deleting iocpf_timer last does not fix this. sem_timer and iocpf_timer rearm each other: bnad_iocpf_sem_timeout() can arm iocpf_timer, and bnad_iocpf_timeout() arms sem_timer from bfa_ioc_hw_sem_get() when the semaphore is busy. timer_delete_sync() only waits out its own callback. bnad_ioceth_disable() can time out and leave that callback live. Shut all four IOC timers down with timer_shutdown_sync() on both paths, so a later mod_timer() is ignored. This issue was identified during our ongoing static-analysis research while reviewing kernel code.",
    "evidence": "osv:CVE-2026-98544",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.224",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.191",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.160",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.112",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.55",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98544",
      "aliases": [
        "CVE-2026-98544"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1d32f7696286eef9e5644eb57e79a36756274357"
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                {
                  "fixed": "8160cd1ec527caedd36c36f948234e834cd086e6"
                },
                {
                  "fixed": "3614582375fc4407e09ff42ff178a045e2fe6e8f"
                },
                {
                  "fixed": "f04cbdfac9b8284146995ab7ba0d054ad1d20ec6"
                },
                {
                  "fixed": "28e32ace754b57534ef0ca0fb99bcbea5b13ba2a"
                },
                {
                  "fixed": "4d97a141e85a034566c33c7ed854c8a3e8a268f1"
                },
                {
                  "fixed": "e09d1c6729ee4a7812128902d9274ff565f958b8"
                },
                {
                  "fixed": "77b1718e39e5c9f6956fb60807326af20baf889d"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98544.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.38"
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                {
                  "fixed": "5.15.224"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
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                {
                  "fixed": "6.1.191"
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              ]
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.160"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.112"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.55"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98544.json"
          }
        }
      ],
      "modified": "2026-11-01T02:30:24.159800009Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/28e32ace754b57534ef0ca0fb99bcbea5b13ba2a",
        "https://git.kernel.org/stable/c/3614582375fc4407e09ff42ff178a045e2fe6e8f",
        "https://git.kernel.org/stable/c/4d97a141e85a034566c33c7ed854c8a3e8a268f1",
        "https://git.kernel.org/stable/c/77b1718e39e5c9f6956fb60807326af20baf889d",
        "https://git.kernel.org/stable/c/8160cd1ec527caedd36c36f948234e834cd086e6",
        "https://git.kernel.org/stable/c/e09d1c6729ee4a7812128902d9274ff565f958b8",
        "https://git.kernel.org/stable/c/f04cbdfac9b8284146995ab7ba0d054ad1d20ec6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98544.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98544",
        "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/2026/98xxx/CVE-2026-98544.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98544",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 488751,
  "published_at": "2026-10-18T15:18:12.964+00:00"
}