{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "22bfa94db2ef6900c790884fa9461486516626e9"
            },
            {
              "fixed": "945d9894502cd9124f5d676181c542ed2000f7c0"
            }
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
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              "introduced": "14a4696bc3118ba49da28f79280e1d55603aa737"
            },
            {
              "fixed": "59672aa4bcd8d32172c1ff6a179583981d6acabc"
            },
            {
              "fixed": "15413a082df69175c2f96aeab4c26fe1ff7cff03"
            },
            {
              "fixed": "6280eda96e0707264849fa7d036fed873c1f8a6d"
            },
            {
              "fixed": "cb6abc584a1bfab107ac003d64948a4aef1730aa"
            },
            {
              "fixed": "b88a511308779c225005d7994b8744561bdbafbc"
            },
            {
              "fixed": "b8278ff605187ef3fa0f2705e93251cce4c4f8ee"
            },
            {
              "fixed": "9b1a02e0d980ac6b0e36a90378f847062f81d7e4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "80c6ddf771df2ef786f28c1ca5919b3f1080091b"
            },
            {
              "last_affected": "ebf91625b3e404bd2b4b694c7ee71c1e8f8bd08f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.10.50"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.12.17"
            },
            {
              "fixed": "5.13"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.13.2"
            },
            {
              "fixed": "5.14"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.14.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72126.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: use unconditional synchronize_rcu() in isotp_release()\n\nisotp_notify() unregisters the (RCU) CAN filters via can_rx_unregister()\nand clears so-\u003ebound without waiting for a grace period. isotp_release()\nuses so-\u003ebound to decide whether it needs to call synchronize_rcu()\nbefore cancelling so-\u003erxtimer, so when NETDEV_UNREGISTER runs first it\nskips that synchronize_rcu() and can cancel the timer while an\nin-flight isotp_rcv() is still executing and about to re-arm it via\nisotp_send_fc(), leading to a use-after-free timer callback on the\nfreed socket.\n\nsakisho-bot remarked a problem with rtnl_lock held in isotp_notify(),\ntherefore make isotp_release() always call synchronize_rcu() before\ncancelling the timers, regardless of so-\u003ebound. This still closes the\noriginal race (isotp_notify() clearing so-\u003ebound without waiting for\nin-flight isotp_rcv() callers before isotp_release() cancels the RX\ntimer) without adding any RCU wait to the netdevice notifier path.",
  "id": "CVE-2026-72126",
  "modified": "2026-08-18T03:31:14.796448499Z",
  "published": "2026-08-15T05:53:03.642Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15413a082df69175c2f96aeab4c26fe1ff7cff03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/59672aa4bcd8d32172c1ff6a179583981d6acabc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6280eda96e0707264849fa7d036fed873c1f8a6d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/945d9894502cd9124f5d676181c542ed2000f7c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b1a02e0d980ac6b0e36a90378f847062f81d7e4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b8278ff605187ef3fa0f2705e93251cce4c4f8ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b88a511308779c225005d7994b8744561bdbafbc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb6abc584a1bfab107ac003d64948a4aef1730aa"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72126.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72126"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "can: isotp: use unconditional synchronize_rcu() in isotp_release()"
}