GHSA-97R7-MPR3-66VH

Vulnerability from github – Published: 2026-08-12 00:31 – Updated: 2026-08-23 15:32
VLAI
Details

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

serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms

Commit b1b4efea05a5 ("serial: 8250_mid: Disable DMA for selected platforms") replaced the dnv_board setup and exit callbacks with PTR_IF(false, ...), which evaluates to NULL. However, the three call sites in mid8250_probe() and mid8250_remove() unconditionally dereference these function pointers without NULL checks, causing a NULL pointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon D (ICX-D/CDF), or Snowridge (SNR) platform.

Fix this by adding the missing NULL checks before calling the setup and exit callbacks.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68434"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-12T00:17:43Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms\n\nCommit b1b4efea05a5 (\"serial: 8250_mid: Disable DMA for selected\nplatforms\") replaced the dnv_board setup and exit callbacks with\nPTR_IF(false, ...), which evaluates to NULL. However, the three call\nsites in mid8250_probe() and mid8250_remove() unconditionally\ndereference these function pointers without NULL checks, causing a NULL\npointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon\nD (ICX-D/CDF), or Snowridge (SNR) platform.\n\nFix this by adding the missing NULL checks before calling the setup and\nexit callbacks.",
  "id": "GHSA-97r7-mpr3-66vh",
  "modified": "2026-08-23T15:32:57Z",
  "published": "2026-08-12T00:31:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68434"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ea933a36a14bec19b71025cdd8407bafbd67ec1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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