GHSA-V8H5-CGHP-Q3C4

Vulnerability from github – Published: 2024-10-21 21:30 – Updated: 2025-11-04 00:31
VLAI?
Details

In the Linux kernel, the following vulnerability has been resolved:

serial: protect uart_port_dtr_rts() in uart_shutdown() too

Commit af224ca2df29 (serial: core: Prevent unsafe uart port access, part 3) added few uport == NULL checks. It added one to uart_shutdown(), so the commit assumes, uport can be NULL in there. But right after that protection, there is an unprotected "uart_port_dtr_rts(uport, false);" call. That is invoked only if HUPCL is set, so I assume that is the reason why we do not see lots of these reports.

Or it cannot be NULL at this point at all for some reason :P.

Until the above is investigated, stay on the safe side and move this dereference to the if too.

I got this inconsistency from Coverity under CID 1585130. Thanks.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-50058"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T20:15:17Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: protect uart_port_dtr_rts() in uart_shutdown() too\n\nCommit af224ca2df29 (serial: core: Prevent unsafe uart port access, part\n3) added few uport == NULL checks. It added one to uart_shutdown(), so\nthe commit assumes, uport can be NULL in there. But right after that\nprotection, there is an unprotected \"uart_port_dtr_rts(uport, false);\"\ncall. That is invoked only if HUPCL is set, so I assume that is the\nreason why we do not see lots of these reports.\n\nOr it cannot be NULL at this point at all for some reason :P.\n\nUntil the above is investigated, stay on the safe side and move this\ndereference to the if too.\n\nI got this inconsistency from Coverity under CID 1585130. Thanks.",
  "id": "GHSA-v8h5-cghp-q3c4",
  "modified": "2025-11-04T00:31:46Z",
  "published": "2024-10-21T21:30:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50058"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2fe399bb8efd0d325ab1138cf8e3ecf23a39e96d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/399927f0f875b93f3d5a0336d382ba48b8671eb2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/602babaa84d627923713acaf5f7e9a4369e77473"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76ed24a34223bb2c6b6162e1d8389ec4e602a290"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7b5876a6e74cdf8468a478be6b23f2f5464ac7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e418d91195d29d5f9c9685ff309b92b04b41dc40"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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