{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3d8c11efd528d56972d44ed0de51c4e11a9a4fa9"
            },
            {
              "fixed": "02de64ab54b4bb0f1b21bb324aeff3b08612be33"
            },
            {
              "fixed": "0e09b522f2622841389c3b2f9ac4969e35c0809d"
            },
            {
              "fixed": "64ae5aaa7ac93c83da456039e8ec747bfa8a7cff"
            },
            {
              "fixed": "5a9b1dda8481b82851a655c3bcc5b44879b95334"
            },
            {
              "fixed": "7780c0bad2a3a70a8c0113a33c02f4151d901eb3"
            },
            {
              "fixed": "a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91"
            },
            {
              "fixed": "54e131db4cdffd946db890ff33ff2647053fd4f6"
            },
            {
              "fixed": "55cc6fe5716f678f06bcb95140882dfa684464ec"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.7.0"
            },
            {
              "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"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43171.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nEFI/CPER: don't dump the entire memory region\n\nThe current logic at cper_print_fw_err() doesn't check if the\nerror record length is big enough to handle offset. On a bad firmware,\nif the ofset is above the actual record, length -= offset will\nunderflow, making it dump the entire memory.\n\nThe end result can be:\n\n - the logic taking a lot of time dumping large regions of memory;\n - data disclosure due to the memory dumps;\n - an OOPS, if it tries to dump an unmapped memory region.\n\nFix it by checking if the section length is too small before doing\na hex dump.\n\n[ rjw: Subject tweaks ]",
  "id": "CVE-2026-43171",
  "modified": "2026-07-08T05:39:16.319315306Z",
  "published": "2026-05-06T11:27:46.698Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/02de64ab54b4bb0f1b21bb324aeff3b08612be33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43171.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43171"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "EFI/CPER: don't dump the entire memory region"
}