GHSA-G689-GJW8-39FQ

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-28 09:31
VLAI
Details

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

HID: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait()

In picolcd_send_and_wait(), an integer overflow of the signed loop counter 'k' can theoretically lead to a NULL pointer dereference of 'raw_data'. If the loop executes more than INT_MAX times, 'k' becomes negative, making the condition 'k < size' true even when 'size' is 0.

Change the type of 'k' to 'unsigned int' to prevent the overflow and eliminate the out-of-bounds access.

Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool.

[jkosina@suse.com: extended hash length]

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80605"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:44Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait()\n\nIn picolcd_send_and_wait(), an integer overflow of the signed loop counter\n\u0027k\u0027 can theoretically lead to a NULL pointer dereference of \u0027raw_data\u0027.\nIf the loop executes more than INT_MAX times, \u0027k\u0027 becomes negative,\nmaking the condition \u0027k \u003c size\u0027 true even when \u0027size\u0027 is 0.\n\nChange the type of \u0027k\u0027 to \u0027unsigned int\u0027 to prevent the overflow and\neliminate the out-of-bounds access.\n\nFound by Linux Verification Center (linuxtesting.org) with the Svace static\nanalysis tool.\n\n[jkosina@suse.com: extended hash length]",
  "id": "GHSA-g689-gjw8-39fq",
  "modified": "2026-08-28T09:31:46Z",
  "published": "2026-08-28T09:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80605"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0021eb09041f021c079be1022934a280f7f176c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/42dc0b7b55fe0499fc09183f34a1c46d1dcccf77"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48caee2c106b03301c72fe389ebff00d852c58d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a02d5d7ad7ae5fa3756b8332f7350e973085dcb3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d354e523c6f740db758cafcd4c11bb7913285ed8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc176447c7279435c46735db7da81aed1ec25cc2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4edeefb8d5bfceb2058e2b3291f4ae1e5a76e61"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef649703dce0df1364fcec3cdad9b32d1c522939"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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