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tty: serial: max3100: shut down timer before freeing port

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: tty: serial: max3100: shut down timer before freeing port max3100_shutdown() stops the polling timer but returns early during system suspend. If the SPI device is unbound before resume, the serial core does not call max3100_shutdown() again, so max3100_remove() frees the port while the timer remains armed. max3100_timeout() may then access the freed port and re-arm the timer. Add final timer teardown to max3100_remove() and use timer_shutdown_sync() to prevent a racing callback from re-arming it. Also free the IRQ and destroy the workqueue there before freeing the port. Keep timer_delete_sync() in max3100_shutdown() so that a subsequent open() can re-arm the timer. The workqueue is created before request_irq() and destroyed on both request_irq() failure and normal shutdown. Its presence at remove thus identifies the IRQ left registered when suspend bypasses shutdown. Free the IRQ before destroying the workqueue, in both max3100_shutdown() and max3100_remove(), and cancel the pending work in between. free_irq() waits for a running interrupt handler to finish and no new handler can start afterwards, so a racing handler cannot queue work on a workqueue that is being destroyed; the force_end_work check in max3100_dowork() only narrows that window, as a handler delayed between the check and queue_work() could still run after the teardown has cleared the workqueue pointer. Cancelling the work also keeps destroy_wor

Announced Source revision 1
Original source ↗

CVE-2026-98749

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98749

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "7831d56b0a3544cbb6f82f76c34ca95e24d5b676",
        "lessThan": "158a07da2da720f2f98b4bea129212c6805d8ee0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a3544cbb6f82f76c34ca95e24d5b676",
        "lessThan": "fb668620e3b163962dabe1a674725a07aa44ff4a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a3544cbb6f82f76c34ca95e24d5b676",
        "lessThan": "2c8614981d3e6e000427de0ab2426ab68274d850",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a3544cbb6f82f76c34ca95e24d5b676",
        "lessThan": "247b8f680876313586aed4d267bfcceddc2b4901",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a3544cbb6f82f76c34ca95e24d5b676",
        "lessThan": "db0949bbd06db0a75b4b1076f1e25194be7d956a",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/tty/serial/max3100.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.30"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.30",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.113",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.56",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.10",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/tty/serial/max3100.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98749

Source reference: /cveMetadata/cveId

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No explicit severity was provided.

Event
#48946 · Revision 1
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