CVE-2026-90335 (GCVE-0-2026-90335)
Vulnerability from cvelistv5
Published
2026-09-17 16:08
Modified
2026-10-30 12:35
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: skip cdev_del() when no cdev is registered TTY device registration can fail before a cdev is allocated. Serial core keeps the port so setserial can still use it, and later removal passes the NULL cdev slot to cdev_del(), causing a NULL-pointer dereference. Only delete the cdev when the slot is not NULL.
References
Impacted products
Vendor Product Version
Linux Linux Version: a3a10ce3429e5dee623ad5c8407ea58e204fcb0a
Version: a3a10ce3429e5dee623ad5c8407ea58e204fcb0a
Version: a3a10ce3429e5dee623ad5c8407ea58e204fcb0a
Version: a3a10ce3429e5dee623ad5c8407ea58e204fcb0a
Version: a3a10ce3429e5dee623ad5c8407ea58e204fcb0a
Version: a3a10ce3429e5dee623ad5c8407ea58e204fcb0a
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/tty/tty_io.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "status": "unaffected",
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              "version": "7.2.6",
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              "lessThanOrEqual": "*",
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              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: skip cdev_del() when no cdev is registered\n\nTTY device registration can fail before a cdev is allocated.\nSerial core keeps the port so setserial can still use it, and later\nremoval passes the NULL cdev slot to cdev_del(), causing a NULL-pointer\ndereference.\n\nOnly delete the cdev when the slot is not NULL."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:35:13.192Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea3d2fae7c1d6492145976553817d22e8ef69a0e"
        },
        {
          "url": "https://git.kernel.org/stable/c/21031bd0d662549412378110c989b164feb6e4be"
        },
        {
          "url": "https://git.kernel.org/stable/c/2af4c46b429907edc8cb069c78fca1d950120b98"
        },
        {
          "url": "https://git.kernel.org/stable/c/3dbf85ef40b6366ba15e882f7536cdc98bea579a"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3b5623fd97648f2747444aa8932ae604662df93"
        }
      ],
      "title": "tty: skip cdev_del() when no cdev is registered",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90335",
    "datePublished": "2026-09-17T16:08:48.127Z",
    "dateReserved": "2026-09-11T19:38:34.803Z",
    "dateUpdated": "2026-10-30T12:35:13.192Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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