FKIE_CVE-2026-98003

Vulnerability from fkie_nvd - Published: 2026-09-25 11:17 - Updated: 2026-09-25 11:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Do not reallocate GA log buffers on resume Commit c5e1a1eb9279 ("iommu/amd: Simplify and Consolidate Virtual APIC (AVIC) Enablement") moved the GA log allocation from iommu_init_pci() to enable_iommus_vapic(), which is called on every resume. iommu_init_ga_log() assigns iommu->ga_log and iommu->ga_log_tail unconditionally. Each resume therefore replaces the boot-time pointers and leaks both old allocations. The function also uses GFP_KERNEL from a syscore resume callback, where interrupts are disabled and the non-boot CPUs are offline. Return early if both buffers are already allocated. Clear the pointers in free_ga_log() so a partial allocation failure cannot leave ga_log dangling.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/00a7dd64888d6dd72110b40e2824a088cf7b7386
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/94458b80d3b203c1c9e2c98aa7319b7713e006c0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b6be275d19cee01f8f1f08a2ff18337103d05d40
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/amd/init.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "94458b80d3b203c1c9e2c98aa7319b7713e006c0",
              "status": "affected",
              "version": "c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b",
              "versionType": "git"
            },
            {
              "lessThan": "b6be275d19cee01f8f1f08a2ff18337103d05d40",
              "status": "affected",
              "version": "c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b",
              "versionType": "git"
            },
            {
              "lessThan": "00a7dd64888d6dd72110b40e2824a088cf7b7386",
              "status": "affected",
              "version": "c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/amd/init.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc3",
              "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/amd: Do not reallocate GA log buffers on resume\n\nCommit c5e1a1eb9279 (\"iommu/amd: Simplify and Consolidate Virtual APIC\n(AVIC) Enablement\") moved the GA log allocation from iommu_init_pci()\nto enable_iommus_vapic(), which is called on every resume.\n\niommu_init_ga_log() assigns iommu-\u003ega_log and iommu-\u003ega_log_tail\nunconditionally. Each resume therefore replaces the boot-time pointers\nand leaks both old allocations. The function also uses GFP_KERNEL from a\nsyscore resume callback, where interrupts are disabled and the non-boot\nCPUs are offline.\n\nReturn early if both buffers are already allocated. Clear the pointers\nin free_ga_log() so a partial allocation failure cannot leave ga_log\ndangling."
    }
  ],
  "id": "CVE-2026-98003",
  "lastModified": "2026-09-25T11:17:28.533",
  "metrics": {},
  "published": "2026-09-25T11:17:28.533",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/00a7dd64888d6dd72110b40e2824a088cf7b7386"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/94458b80d3b203c1c9e2c98aa7319b7713e006c0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b6be275d19cee01f8f1f08a2ff18337103d05d40"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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