GHSA-HRWQ-83VM-HR68

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-19 18:32
VLAI
Details

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

iommu/intel: Fix out-of-bounds memset in dmar_latency_disable()

dmar_latency_disable() intends to zero out only the single latency_statistic entry for the given type, but the memset size was computed as sizeof(*lstat) * DMAR_LATENCY_NUM, which clears the entire array starting from &lstat[type].

When type > 0, this writes beyond the end of the allocated array, corrupting adjacent memory.

Fix by using sizeof(*lstat) to clear only the target entry.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68324"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:22Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/intel: Fix out-of-bounds memset in dmar_latency_disable()\n\ndmar_latency_disable() intends to zero out only the single\nlatency_statistic entry for the given type, but the memset size was\ncomputed as sizeof(*lstat) * DMAR_LATENCY_NUM, which clears the entire\narray starting from \u0026lstat[type].\n\nWhen type \u003e 0, this writes beyond the end of the allocated array,\ncorrupting adjacent memory.\n\nFix by using sizeof(*lstat) to clear only the target entry.",
  "id": "GHSA-hrwq-83vm-hr68",
  "modified": "2026-08-19T18:32:14Z",
  "published": "2026-08-10T15:33:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68324"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e28ca1c3204b51068579defc904a0dfba5e5c57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/104d89cf5b01cb66ff975d91ed42f61b3904df53"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3078d82e7fe9048a2b90a992e71af7cd7ef881fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/754f8efe45f87e3a9c6871b645b2f9d46d1b407b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/80f3605991461679c298ea2045c350ee3cf36de3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/866a35735e56b9dc81cbc33899255134adf6d8b3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d06fea9b85f038690f55e72fe0c45e113715a85a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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