{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "27291e2165b6de70c476b7b675308113edd69a60"
            },
            {
              "fixed": "124c81ee610e1fbdd93d4399f88d9e28ba97a941"
            },
            {
              "fixed": "e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4"
            },
            {
              "fixed": "c85d402553987777cc4742751437ea5dcbf98a7b"
            },
            {
              "fixed": "5fbf319137735252eefa507193c9a619af5b7457"
            },
            {
              "fixed": "4048d0a252163084794be3e37995b872c5178913"
            },
            {
              "fixed": "f55e4d415d95342d5753e528e05a1e8623992c3f"
            },
            {
              "fixed": "46cb8a273e2f853f89a78b59dbdff8787b6e1c86"
            },
            {
              "fixed": "aa9c8e8baf1e765fa65b93212522c636f25d846f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.16.0"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89924.json"
  },
  "details": "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.",
  "id": "CVE-2026-89924",
  "modified": "2026-09-18T03:30:51.438187049Z",
  "published": "2026-09-16T10:32:17.442Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/124c81ee610e1fbdd93d4399f88d9e28ba97a941"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4048d0a252163084794be3e37995b872c5178913"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46cb8a273e2f853f89a78b59dbdff8787b6e1c86"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5fbf319137735252eefa507193c9a619af5b7457"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aa9c8e8baf1e765fa65b93212522c636f25d846f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c85d402553987777cc4742751437ea5dcbf98a7b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e5ae7816e5ad145618f7fd568a0e8a94dd9f81f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f55e4d415d95342d5753e528e05a1e8623992c3f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89924.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89924"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "KVM: s390: Fix old_data leak in guest debug error path"
}