GHSA-3PPG-6J84-F79C

Vulnerability from github – Published: 2025-09-15 15:31 – Updated: 2025-12-03 15:30
VLAI?
Details

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

media: az6007: Fix null-ptr-deref in az6007_i2c_xfer()

In az6007_i2c_xfer, msg is controlled by user. When msg[i].buf is null and msg[i].len is zero, former checks on msg[i].buf would be passed. Malicious data finally reach az6007_i2c_xfer. If accessing msg[i].buf[0] without sanity check, null ptr deref would happen. We add check on msg[i].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-2023-53220"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-15T15:15:48Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: az6007: Fix null-ptr-deref in az6007_i2c_xfer()\n\nIn az6007_i2c_xfer, msg is controlled by user. When msg[i].buf\nis null and msg[i].len is zero, former checks on msg[i].buf would be\npassed. Malicious data finally reach az6007_i2c_xfer. If accessing\nmsg[i].buf[0] without sanity check, null ptr deref would happen.\nWe add check on msg[i].len to prevent crash.\n\nSimilar commit:\ncommit 0ed554fd769a\n(\"media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()\")",
  "id": "GHSA-3ppg-6j84-f79c",
  "modified": "2025-12-03T15:30:27Z",
  "published": "2025-09-15T15:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53220"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1047f9343011f2cedc73c64829686206a7e9fc3f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b1ea100ad3695025969dc4693f307877fb688d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6ab7ea4e17d6a605d05308adf8f3408924770cba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/991c77fe18c6f374bbf83376f8c42550aa565662"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1110f19d4940e4185251d072cbb0ff51486a1e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a9def3e9718a4dc756f48db147d42ec41a966240"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/adcb73f8ce9aec48b1f85223f401c1574015d8d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6763fefa267f6e62595a6ac1f57815d99fc90b7"
    }
  ],
  "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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