GHSA-QP76-QQR3-XHV8

Vulnerability from github – Published: 2025-09-05 18:31 – Updated: 2026-01-09 21:31
VLAI?
Details

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

media: dvb-frontends: w7090p: fix null-ptr-deref in w7090p_tuner_write_serpar and w7090p_tuner_read_serpar

In w7090p_tuner_write_serpar, msg is controlled by user. When msg[0].buf is null and msg[0].len is zero, former checks on msg[0].buf would be passed. If accessing msg[0].buf[2] without sanity check, null pointer deref would happen. We add check on msg[0].len to prevent crash.

Similar commit: commit 0ed554fd769a ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()")

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-2025-38693"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-04T16:15:37Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-frontends: w7090p: fix null-ptr-deref in w7090p_tuner_write_serpar and w7090p_tuner_read_serpar\n\nIn w7090p_tuner_write_serpar, msg is controlled by user. When msg[0].buf is null and msg[0].len is zero, former checks on msg[0].buf would be passed. If accessing msg[0].buf[2] without sanity check, null pointer deref would happen. We add\ncheck on msg[0].len to prevent crash.\n\nSimilar commit: commit 0ed554fd769a (\"media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()\")",
  "id": "GHSA-qp76-qqr3-xhv8",
  "modified": "2026-01-09T21:31:32Z",
  "published": "2025-09-05T18:31:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38693"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/17b30e5ded062bd74f8ca6f317e1d415a8680665"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/39b06b93f24dff923c4183d564ed28c039150554"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/454a443eaa792c8865c861a282fe6d4f596abc3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6bbaec6a036940e22318f0454b50b8000845ab59"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a41ecfc3415ebe3b4c44f96b3337691dcf431a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99690a494d91a0dc86cebd628da4c62c40552bcb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b3d77a3fc71c084575d3df4ec6544b3fb6ce587d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed0234c8458b3149f15e496b48a1c9874dd24a1b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f98132a59ccc59a8b97987363bc99c8968934756"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.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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