Shim: out-of-bounds read printing error messages

{
  "id": "315c7e3c0cbf9191bb59a2e319c566ebd3cb114a30b5cd8a56263c607b194465",
  "url": "https://osv.dev/vulnerability/CVE-2023-40546",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Shim: out-of-bounds read printing error messages",
    "summary": "A flaw was found in Shim when an error happened while creating a new ESL variable. If Shim fails to create the new variable, it tries to print an error message to the user; however, the number of parameters used by the logging function doesn't match the format string used by it, leading to a crash under certain circumstances.",
    "evidence": "osv:CVE-2023-40546",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-40546",
      "aliases": [
        "CVE-2023-40546"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rhboot/shim",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "5914984a1ffeab841f482c791426d7ca9935a5e6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:redhat:shim:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "15.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "15.7",
            "15.6",
            "15.6-rc2",
            "15.5",
            "15.5-rc2",
            "15.4",
            "15.3",
            "shim-15.3-rc4",
            "shim-15.3-rc3",
            "shim-15.3-rc2",
            "shim-15.3-rc1",
            "15.2",
            "15",
            "14",
            "13",
            "12",
            "11",
            "0.9",
            "0.8",
            "0.7",
            "0.5",
            "0.4",
            "0.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-40546.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.139474483Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/downloads/content/package-browser/",
        "https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html",
        "https://access.redhat.com/errata/RHSA-2024:1834",
        "https://access.redhat.com/errata/RHSA-2024:1835",
        "https://access.redhat.com/errata/RHSA-2024:1873",
        "https://access.redhat.com/errata/RHSA-2024:1876",
        "https://access.redhat.com/errata/RHSA-2024:1883",
        "https://access.redhat.com/errata/RHSA-2024:1902",
        "https://access.redhat.com/errata/RHSA-2024:1903",
        "https://access.redhat.com/errata/RHSA-2024:1959",
        "https://access.redhat.com/errata/RHSA-2024:2086",
        "https://access.redhat.com/security/cve/CVE-2023-40546",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40546.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-40546",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2241796"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-476"
        ],
        "cna_assigner": "redhat",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "0:15.8-3.el7"
                  },
                  {
                    "fixed": "0:15.8-1.el7"
                  },
                  {
                    "fixed": "0:15.8-4.el8_9"
                  },
                  {
                    "fixed": "0:15.8-2.el8_2"
                  },
                  {
                    "fixed": "0:15.8-2.el8_2"
                  },
                  {
                    "fixed": "0:15.8-2.el8_2"
                  },
                  {
                    "fixed": "0:15.8-2.el8_4"
                  },
                  {
                    "fixed": "0:15.8-2.el8_4"
                  },
                  {
                    "fixed": "0:15.8-2.el8_4"
                  },
                  {
                    "fixed": "0:15.8-2.el8_6"
                  },
                  {
                    "fixed": "0:15.8-2.el8"
                  },
                  {
                    "fixed": "0:15.8-2.el8"
                  },
                  {
                    "fixed": "0:15.8-4.el9_3"
                  },
                  {
                    "fixed": "0:15.8-3.el9"
                  },
                  {
                    "fixed": "0:15.8-2.el9"
                  },
                  {
                    "fixed": "0:15.8-2.el9"
                  },
                  {
                    "fixed": "0:15.8-3.el9_2"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "InverseAffectedRanges"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40546.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-40546",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505457,
  "published_at": "2024-01-29T16:29:26.258+00:00"
}