CVE-2026-89924 (GCVE-0-2026-89924)
Vulnerability from cvelistv5
Published
2026-09-16 10:32
Modified
2026-10-19 08:54
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Fix old_data leak in guest debug error path __import_wp_info() allocates a per-watchpoint old_data buffer to back up the original guest memory contents. If a later watchpoint of the same KVM_SET_GUEST_DEBUG request fails to import, kvm_s390_import_bp_data() jumps to the error label, which frees the wp_info array but not the old_data buffers of the entries that were imported successfully. Up to MAX_BP_COUNT - 1 buffers of up to MAX_WP_SIZE bytes are leaked per failed request, and the request can be repeated. Create error handling for cleaning up all created old_data memory areas.
References
Impacted products
Vendor Product Version
Linux Linux Version: 27291e2165b6de70c476b7b675308113edd69a60
Version: 27291e2165b6de70c476b7b675308113edd69a60
Version: 27291e2165b6de70c476b7b675308113edd69a60
Version: 27291e2165b6de70c476b7b675308113edd69a60
Version: 27291e2165b6de70c476b7b675308113edd69a60
Version: 27291e2165b6de70c476b7b675308113edd69a60
Version: 27291e2165b6de70c476b7b675308113edd69a60
Version: 27291e2165b6de70c476b7b675308113edd69a60
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{
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          "programFiles": [
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Fix old_data leak in guest debug error path\n\n__import_wp_info() allocates a per-watchpoint old_data buffer to back up\nthe original guest memory contents. If a later watchpoint of the same\nKVM_SET_GUEST_DEBUG request fails to import, kvm_s390_import_bp_data()\njumps to the error label, which frees the wp_info array but not the\nold_data buffers of the entries that were imported successfully. Up to\nMAX_BP_COUNT - 1 buffers of up to MAX_WP_SIZE bytes are leaked per failed\nrequest, and the request can be repeated.\n\nCreate error handling for cleaning up all created old_data memory\nareas."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:54:59.186Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/124c81ee610e1fbdd93d4399f88d9e28ba97a941"
        },
        {
          "url": "https://git.kernel.org/stable/c/e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4"
        },
        {
          "url": "https://git.kernel.org/stable/c/c85d402553987777cc4742751437ea5dcbf98a7b"
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          "url": "https://git.kernel.org/stable/c/5fbf319137735252eefa507193c9a619af5b7457"
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          "url": "https://git.kernel.org/stable/c/4048d0a252163084794be3e37995b872c5178913"
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        },
        {
          "url": "https://git.kernel.org/stable/c/aa9c8e8baf1e765fa65b93212522c636f25d846f"
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      "title": "KVM: s390: Fix old_data leak in guest debug error path",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89924",
    "datePublished": "2026-09-16T10:32:17.442Z",
    "dateReserved": "2026-09-11T19:38:34.775Z",
    "dateUpdated": "2026-10-19T08:54:59.186Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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