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GHSA-CG6J-2HPF-XR59

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32
VLAI
Details

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

rtc: msc313: fix NULL deref in shared IRQ handler at probe

msc313_rtc_probe() calls devm_request_irq() with IRQF_SHARED and &pdev->dev as the cookie, but platform_set_drvdata() is only called later after the clock setup. With a shared IRQ line, another device on the same line can trigger the handler in that window. The handler does dev_get_drvdata() on the cookie, gets NULL, and dereferences priv->rtc_base in interrupt context.

Pass priv as the cookie directly so the handler reads it from dev_id without the lookup, removing the dependency on probe order.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72424"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:16Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtc: msc313: fix NULL deref in shared IRQ handler at probe\n\nmsc313_rtc_probe() calls devm_request_irq() with IRQF_SHARED and\n\u0026pdev-\u003edev as the cookie, but platform_set_drvdata() is only called\nlater after the clock setup. With a shared IRQ line, another device\non the same line can trigger the handler in that window. The\nhandler does dev_get_drvdata() on the cookie, gets NULL, and\ndereferences priv-\u003ertc_base in interrupt context.\n\nPass priv as the cookie directly so the handler reads it from\ndev_id without the lookup, removing the dependency on probe order.",
  "id": "GHSA-cg6j-2hpf-xr59",
  "modified": "2026-08-15T06:32:24Z",
  "published": "2026-08-15T06:32:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72424"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f6a4aec0d36647eb2f67cd69db22bd28cabe2cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52c73b6992b46ed476590ed526faa033d4fbfc5d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a369f48be8de426a7d2bca18dbd46c2ad1138803"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb3e624808c981fe881cb79037be63e680ed7d38"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc1f61a9b97d65de21c2681bcf0b5b1392c58486"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ece7b9ffde23e2ccd7567761ac27463ded43932c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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