FKIE_CVE-2026-81883

Vulnerability from fkie_nvd - Published: 2026-09-22 16:18 - Updated: 2026-09-23 18:21
Severity
3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Summary
radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Lua 5.3 bytecode function parser was vulnerable because the Lua 5.3 bytecode function parser read fixed function-metadata fields immediately after a function-name string without checking the remaining buffer length. The vulnerability is triggered by opening or inspecting a crafted Lua 5.3 bytecode file whose function-name string ends at the input-buffer boundary. The parser read two integers and three one-byte fields beyond the allocated input buffer. This can cause invalid parser results or process termination; no attacker-observable memory disclosure has been demonstrated. This issue is fixed in version 6.2.0.
References
security-advisories@github.comhttps://github.com/radareorg/radare2/commit/26c2eac360033458e9d266e5e30667d1f8d642e3
security-advisories@github.comhttps://github.com/radareorg/radare2/issues/26228
security-advisories@github.comhttps://github.com/radareorg/radare2/releases/tag/6.2.0
security-advisories@github.comhttps://github.com/radareorg/radare2/security/advisories/GHSA-96m5-hvwp-674c
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/radareorg/radare2/issues/26228
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "radare2",
          "vendor": "radareorg",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.2.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2\u0027s Lua 5.3 bytecode function parser was vulnerable because the Lua 5.3 bytecode function parser read fixed function-metadata fields immediately after a function-name string without checking the remaining buffer length. The vulnerability is triggered by opening or inspecting a crafted Lua 5.3 bytecode file whose function-name string ends at the input-buffer boundary. The parser read two integers and three one-byte fields beyond the allocated input buffer. This can cause invalid parser results or process termination; no attacker-observable memory disclosure has been demonstrated. This issue is fixed in version 6.2.0."
    }
  ],
  "id": "CVE-2026-81883",
  "lastModified": "2026-09-23T18:21:42.327",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 3.3,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-81883",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-22T16:11:00.525508Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-22T16:18:03.200",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/radareorg/radare2/commit/26c2eac360033458e9d266e5e30667d1f8d642e3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/radareorg/radare2/issues/26228"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/radareorg/radare2/releases/tag/6.2.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/radareorg/radare2/security/advisories/GHSA-96m5-hvwp-674c"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/radareorg/radare2/issues/26228"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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