FKIE_CVE-2026-68324

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-19 17:20
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e28ca1c3204b51068579defc904a0dfba5e5c57
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/104d89cf5b01cb66ff975d91ed42f61b3904df53
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3078d82e7fe9048a2b90a992e71af7cd7ef881fa
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/754f8efe45f87e3a9c6871b645b2f9d46d1b407b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/80f3605991461679c298ea2045c350ee3cf36de3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/866a35735e56b9dc81cbc33899255134adf6d8b3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d06fea9b85f038690f55e72fe0c45e113715a85a
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/intel/perf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "80f3605991461679c298ea2045c350ee3cf36de3",
              "status": "affected",
              "version": "55ee5e67a59a1b6f388d7a1c7b24022145f47a3e",
              "versionType": "git"
            },
            {
              "lessThan": "104d89cf5b01cb66ff975d91ed42f61b3904df53",
              "status": "affected",
              "version": "55ee5e67a59a1b6f388d7a1c7b24022145f47a3e",
              "versionType": "git"
            },
            {
              "lessThan": "3078d82e7fe9048a2b90a992e71af7cd7ef881fa",
              "status": "affected",
              "version": "55ee5e67a59a1b6f388d7a1c7b24022145f47a3e",
              "versionType": "git"
            },
            {
              "lessThan": "866a35735e56b9dc81cbc33899255134adf6d8b3",
              "status": "affected",
              "version": "55ee5e67a59a1b6f388d7a1c7b24022145f47a3e",
              "versionType": "git"
            },
            {
              "lessThan": "d06fea9b85f038690f55e72fe0c45e113715a85a",
              "status": "affected",
              "version": "55ee5e67a59a1b6f388d7a1c7b24022145f47a3e",
              "versionType": "git"
            },
            {
              "lessThan": "0e28ca1c3204b51068579defc904a0dfba5e5c57",
              "status": "affected",
              "version": "55ee5e67a59a1b6f388d7a1c7b24022145f47a3e",
              "versionType": "git"
            },
            {
              "lessThan": "754f8efe45f87e3a9c6871b645b2f9d46d1b407b",
              "status": "affected",
              "version": "55ee5e67a59a1b6f388d7a1c7b24022145f47a3e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/intel/perf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-68324",
  "lastModified": "2026-08-19T17:20:42.567",
  "metrics": {},
  "published": "2026-08-10T13:20:22.550",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0e28ca1c3204b51068579defc904a0dfba5e5c57"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/104d89cf5b01cb66ff975d91ed42f61b3904df53"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3078d82e7fe9048a2b90a992e71af7cd7ef881fa"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/754f8efe45f87e3a9c6871b645b2f9d46d1b407b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/80f3605991461679c298ea2045c350ee3cf36de3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/866a35735e56b9dc81cbc33899255134adf6d8b3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d06fea9b85f038690f55e72fe0c45e113715a85a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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