CVE-2026-62254

Full vulnerability record from the local CVENow database.

Description

LibreDWG is a free C library to read and write DWG files. Prior to 0.14, a specially crafted R13-R2000 DWG can trigger algorithmic resource exhaustion in `decode_R13_R2000` in `src/decode.c`. The class-decoding loop performs `realloc` on every iteration without a sanity check on `num_classes`. Manipulating that field forces an extremely slow allocation loop and denial of service when the file is parsed. Running the parser in a sandbox with memory limits is a workaround rather than a remediation. This issue is fixed in version 0.14.

Severity

MEDIUM

CVSS score

5.5 (v3.1)

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-10-30 21:17:13.370000

Last modified

2026-10-30 21:17:13.370000

View original CVE JSON

{
  "id": "CVE-2026-62254",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-30T21:17:13.370",
  "lastModified": "2026-10-30T21:17:13.370",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LibreDWG is a free C library to read and write DWG files. Prior to 0.14, a specially crafted R13-R2000 DWG can trigger algorithmic resource exhaustion in `decode_R13_R2000` in `src/decode.c`. The class-decoding loop performs `realloc` on every iteration without a sanity check on `num_classes`. Manipulating that field forces an extremely slow allocation loop and denial of service when the file is parsed. Running the parser in a sandbox with memory limits is a workaround rather than a remediation. This issue is fixed in version 0.14."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "LibreDWG",
          "product": "libredwg",
          "versions": [
            {
              "version": "< 0.14",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-789"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/LibreDWG/libredwg/commit/9de893a2e395ff5ac104a46cca54c5e2cf8f02cf",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/LibreDWG/libredwg/issues/1261",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/LibreDWG/libredwg/releases/tag/0.14",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-gp83-hcvh-g255",
      "source": "[email protected]"
    }
  ]
}