FKIE_CVE-2026-103658

Vulnerability from fkie_nvd - Published: 2026-10-12 22:17 - Updated: 2026-10-12 23:17
Severity
5.9 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Summary
GNU Aspell 0.60.8.2 (first vulnerable version is not known) contains a heap-based buffer overflow write (CWE-122) in its read-only dictionary loader. String::reserve() in common/string.hpp computes its capacity check with a signed int ((int)s + 1), so a requested size of 0x7FFFFFFF wraps negative and the backing buffer is never grown. ReadOnlyDict::load() in modules/speller/default/readonly_ws.cpp passes the unvalidated 32-bit size fields from a .rws dictionary header into this path, so a crafted .rws file with a valid endian marker (12345678) and an oversized length field (e.g. lang_name_size = 0x7FFFFFFF) causes attacker-controlled data to be written out of bounds past an undersized heap allocation. An attacker who induces a victim to load a malicious dictionary — for example via aspell dump master <file> — can corrupt heap memory, resulting in denial of service and potentially code execution. Fixed in b830b6e and will be fixed in release 0.60.8.3.
References
98a01053-8a31-4f6d-9aa9-252be161adc6https://github.com/GNUAspell/aspell/security/advisories/GHSA-p35p-2mw5-fj5j
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "packageURL": "pkg:github/GNUAspell/aspell",
          "product": "Aspell",
          "vendor": "GNU",
          "versions": [
            {
              "status": "affected",
              "version": "0.60.8.2",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "98a01053-8a31-4f6d-9aa9-252be161adc6"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "GNU Aspell 0.60.8.2 (first vulnerable version is not known) contains a heap-based buffer overflow write (CWE-122) in its read-only dictionary loader. String::reserve() in common/string.hpp computes its capacity check with a signed int ((int)s + 1), so a requested size of 0x7FFFFFFF wraps negative and the backing buffer is never grown. ReadOnlyDict::load() in modules/speller/default/readonly_ws.cpp passes the unvalidated 32-bit size fields from a .rws dictionary header into this path, so a crafted .rws file with a valid endian marker (12345678) and an oversized length field (e.g. lang_name_size = 0x7FFFFFFF) causes attacker-controlled data to be written out of bounds past an undersized heap allocation. An attacker who induces a victim to load a malicious dictionary \u2014 for example via aspell dump master \u003cfile\u003e \u2014 can corrupt heap memory, resulting in denial of service and potentially code execution. Fixed in b830b6e and will be fixed in release 0.60.8.3."
    }
  ],
  "id": "CVE-2026-103658",
  "lastModified": "2026-10-12T23:17:19.700",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 3.4,
        "source": "98a01053-8a31-4f6d-9aa9-252be161adc6",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-12T22:17:03.143",
  "references": [
    {
      "source": "98a01053-8a31-4f6d-9aa9-252be161adc6",
      "url": "https://github.com/GNUAspell/aspell/security/advisories/GHSA-p35p-2mw5-fj5j"
    }
  ],
  "sourceIdentifier": "98a01053-8a31-4f6d-9aa9-252be161adc6",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ],
      "source": "98a01053-8a31-4f6d-9aa9-252be161adc6",
      "type": "Secondary"
    }
  ]
}



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