{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-80889",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80889",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-04T17:11:05.854Z",
    "updatedAt": "2026-09-04T17:11:05.854Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "can: isotp: fix timer drain order, wakeup handling and tx_gen ordering",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: fix timer drain order, wakeup handling and tx_gen ordering\n\nThis patch is a follow-up to commit cf070fe33bfb (\"can: isotp: serialize\nTX state transitions under so->rx_lock\") which addresses following\nsashiko-bot findings:\n\n- isotp_sendmsg(): drain so->txfrtimer first so a stale callback can't\n  re-arm echotimer after the claim\n\n- isotp_release(): wake so->wait after forcing ISOTP_SHUTDOWN so a\n  sleeping sendmsg() claim isn't stranded\n\n- isotp_sendmsg(): have both wait_event_interruptible() calls in\n  isotp_sendmsg() also wake on ISOTP_SHUTDOWN and do not return claim to\n  IDLE to avoid corrupting a concurrent isotp_release() process.\n\n- isotp_sendmsg(): handle potential claim of a new transfer when\n  the wait_event_interruptible() call returns in CAN_ISOTP_WAIT_TX_DONE\n  mode. Don't touch timers and states of the new transfer if a new thread\n  incremented so->tx_gen before getting the lock at err_event_drop.\n\n- isotp_sendmsg(): handle a stuck can_send() and omit timer and state\n  changes if a new transfer was claimed. wait_tx_done() returns the error\n  recorded in so->tx_result[], tagged with the caller's own generation.\n\n- isotp_tx_timeout(): on a claimed timeout, record the ECOMM error for\n  the timed-out transfer's own generation in so->tx_result[]; sk->sk_err\n  is raised unconditionally, same as every other error path here.\n\n- isotp_tx_gen_done()/isotp_tx_timeout(): always read tx.state (acquire)\n  before tx_gen - the reverse order let a weakly ordered CPU pair a fresh\n  tx.state with a stale tx_gen/tx_result slot.\n\n- isotp_sendmsg(): wait_tx_done: drain sk_err via sock_error() once we\n  have read the result from so->tx_result[], so an already-reported error\n  doesn't stay latched for a later poll()/SO_ERROR.\n\nAlso align the remaining lock-free so->tx.state/rx.state/cfecho accesses\nand use skb->hash as unique loopback echo frame indicator.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "bbedeb67a9a684f2fb78c55bd3662c400526715e",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8acab9fc66d6f426c36968c91a979f70784945a7"
            },
            {
              "version": "377a8f500704da42ed86a4541ed930e9dcfdb2ea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "af7e25c649ed68cbad07f8185af0f31b892cbf29"
            },
            {
              "version": "6da8119e8dd542194103139812d1a4b7dcd1aedd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2753722612d8824d3910096f93059f669009b0f0"
            },
            {
              "version": "0b05eca9589f609e2491b528dccf683168a4cda8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bf5c4a8b24acb12739ebb9aea5510b007e4f5239"
            },
            {
              "version": "a7d90e7b5e75d7406c889fe36e9a61ee364a00cb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "deca7746b57d982cd4f0301f4443f56780c4a048"
            },
            {
              "version": "37beb16e08cae94cc05840c7274225e3b0b38ae7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "10be509fa8fd95d1e47d40d1f68b0b26dfe9d572"
            },
            {
              "version": "4f1fdf1a1c317bcac0c6b6c8e12642c9983de1ca",
              "status": "affected",
              "versionType": "git",
              "lessThan": "35c62ac98d06669aa3f0f38b7829eaca929a611e"
            },
            {
              "version": "cf070fe33bfbd1a4c21236078fadb35dd223a157",
              "status": "affected",
              "versionType": "git",
              "lessThan": "050f010f920da17c1044a4f174766ad553e770b6"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5.10.265",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.267"
            },
            {
              "version": "5.15.216",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.218"
            },
            {
              "version": "6.1.183",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.185"
            },
            {
              "version": "6.6.148",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.151"
            },
            {
              "version": "6.12.101",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.103"
            },
            {
              "version": "6.18.40",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.18.44"
            },
            {
              "version": "7.1.5",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "7.1.8"
            }
          ]
        }
      ]
    }
  }
}