APEI/GHES: ensure that won't go past CPER allocated record

{
  "id": "632d50980bf5896dde1848da4abb2dba83626e19142d8d147fd84a16c095fa18",
  "url": "https://osv.dev/vulnerability/CVE-2026-43277",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "APEI/GHES: ensure that won't go past CPER allocated record",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: APEI/GHES: ensure that won't go past CPER allocated record The logic at ghes_new() prevents allocating too large records, by checking if they're bigger than GHES_ESTATUS_MAX_SIZE (currently, 64KB). Yet, the allocation is done with the actual number of pages from the CPER bios table location, which can be smaller. Yet, a bad firmware could send data with a different size, which might be bigger than the allocated memory, causing an OOPS: Unable to handle kernel paging request at virtual address fff00000f9b40000 Mem abort info: ESR = 0x0000000096000007 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x07: level 3 translation fault Data abort info: ISV = 0, ISS = 0x00000007, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 swapper pgtable: 4k pages, 52-bit VAs, pgdp=000000008ba16000 [fff00000f9b40000] pgd=180000013ffff403, p4d=180000013fffe403, pud=180000013f85b403, pmd=180000013f68d403, pte=0000000000000000 Internal error: Oops: 0000000096000007 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 303 Comm: kworker/0:1 Not tainted 6.19.0-rc1-00002-gda407d200220 #34 PREEMPT Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 02/02/2022 Workqueue: kacpi_notify acpi_os_execute_deferred pstate: 214020c5 (nzCv daIF +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : hex_dump_to_buffer+0x30c/0x4a0 lr : hex_dump_to_buffer+0x328/0x4a0 sp : ffff800",
    "evidence": "osv:CVE-2026-43277",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.252",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.202",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.165",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.128",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.75",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-43277",
      "aliases": [
        "CVE-2026-43277"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d334a49113a4a33109fd24e46073280ecd1bea0d"
                },
                {
                  "fixed": "92ba79074c58e65a6e32713758c5a9aecd33c2ea"
                },
                {
                  "fixed": "616c120dcdf1ce96edcd818e38bce49667f80689"
                },
                {
                  "fixed": "f3740a1562445f36f08afab8af59e37117b3acdc"
                },
                {
                  "fixed": "e0ec99115e135dbb58e11a0df007c7d4771d4a17"
                },
                {
                  "fixed": "b6be51a12441136fdf8c49b2525689fbea1856e1"
                },
                {
                  "fixed": "6f5d41984ad896736c23e2fff7c80e15c1319132"
                },
                {
                  "fixed": "98bd9b28d4d11e6739ad86524b4be4ada9025e60"
                },
                {
                  "fixed": "fa2408a24f8f0db14d9cfc613ef162dc267d7ad4"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43277.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.35"
                },
                {
                  "fixed": "5.10.252"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.202"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.165"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.128"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.75"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.16"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43277.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.807116892Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/616c120dcdf1ce96edcd818e38bce49667f80689",
        "https://git.kernel.org/stable/c/6f5d41984ad896736c23e2fff7c80e15c1319132",
        "https://git.kernel.org/stable/c/92ba79074c58e65a6e32713758c5a9aecd33c2ea",
        "https://git.kernel.org/stable/c/98bd9b28d4d11e6739ad86524b4be4ada9025e60",
        "https://git.kernel.org/stable/c/b6be51a12441136fdf8c49b2525689fbea1856e1",
        "https://git.kernel.org/stable/c/e0ec99115e135dbb58e11a0df007c7d4771d4a17",
        "https://git.kernel.org/stable/c/f3740a1562445f36f08afab8af59e37117b3acdc",
        "https://git.kernel.org/stable/c/fa2408a24f8f0db14d9cfc613ef162dc267d7ad4",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43277.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43277",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43277.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-43277",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 509293,
  "published_at": "2026-05-06T11:28:59.486+00:00"
}