{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "242c652849d979d0133c315a42d9acea0ff88390"
            },
            {
              "fixed": "5ff385e9403e87ae33f65b8c38698d3b1e92cfde"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "136093ba4161e0080088abff48273f6830a47766"
            },
            {
              "fixed": "452eb28e03015abec6d4bf6488ee567706ade4e1"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "87880af2d24e62a84ed19943dbdd524f097172f2"
            },
            {
              "fixed": "b48b613073c3d652cb1823c15d16f7067cf4cee4"
            },
            {
              "fixed": "903308ea40adf0577d82eab69882faf8836326ce"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "db103b8bd3a4aca69b1b5fe8831a6ed75ac4b3bd"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.12.75"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.18.16"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.19.6"
            },
            {
              "fixed": "6.20"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89588.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: APEI: GHES: fix ARM section length accounting after header\n\nIn ghes_handle_arm_hw_error(), after skipping the cper_sec_proc_arm\nheader with (err + 1), the remaining length was reduced by sizeof(err)\n(pointer size) instead of sizeof(*err) (structure size).\n\nThat overestimates the bytes left for cper_arm_err_info records and can\nlet the parser read past the CPER section when err_info_num is large\nenough relative to error_data_length.\n\nUse sizeof(*err) so the length accounting matches the pointer advance\nand the earlier sizeof(*err) size check.",
  "id": "CVE-2026-89588",
  "modified": "2026-09-15T03:31:00.076443127Z",
  "published": "2026-09-11T19:44:52.842Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/452eb28e03015abec6d4bf6488ee567706ade4e1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ff385e9403e87ae33f65b8c38698d3b1e92cfde"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/903308ea40adf0577d82eab69882faf8836326ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b48b613073c3d652cb1823c15d16f7067cf4cee4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89588.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89588"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ACPI: APEI: GHES: fix ARM section length accounting after header"
}