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CVE-2026-81886

📛 CVE Title

radare2: Uncontrolled memory allocation in radare2 dmp64 parser

⬇ Download JSON

Description

radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Windows 64-bit crash-dump dmp64 parser was vulnerable because the Windows dmp64 parser used an input-controlled physical-memory-run PageCount directly as the bound of a per-page allocation loop. The vulnerability is triggered by opening a small crafted full-memory Windows crash dump. The parser repeatedly allocated and appended page descriptors without validating the count against the dump size. This can cause denial of service through excessive memory consumption and processing time. This issue is fixed in version 6.2.0.

Overview

State
PUBLISHED
Assigner (CNA)
GitHub_M
CVSS severity
MEDIUM
CVSS score
CVSS 5.5 / 10 5.5 5.5 / 10
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Effective score
5.5 / 10 MEDIUM source: CNA overview
CWE(s)
CWE-770
Reserved
2026-08-27
Published
2026-09-22 15:11 UTC
Last updated
2026-09-22 17:44 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/81xxx/CVE-2026-81886.json

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-09-22 16:18:03 UTC
NVD last modified
2026-09-22 18:17:20 UTC
NVD CVSS v3.1
CVSS 5.5 / 10 5.5 5.5 / 10 MEDIUM source: security-advisories@github.com
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Exploitability subscore
1.8 / 10
Impact subscore
3.6 / 10

NVD / KEV / EPSS data refreshed 2026-09-23 02:38 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-84469
Assigner
GitHub_M
Published
Sep 22, 2026, 3:11:36 PM
Updated
Sep 22, 2026, 5:44:33 PM
EUVD base score (CVSS 3.1)
5.5 / 10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EUVD-reported EPSS
0.0000
Vendors
radareorg
Products
radare2 (< 6.2.0)

ENISA description: radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Windows 64-bit crash-dump dmp64 parser was vulnerable because the Windows dmp64 parser used an input-controlled physical-memory-run PageCount directly as the bound of a per-page allocation loop. The vulnerability is triggered by opening a small crafted full-memory Windows crash dump. The parser repeatedly allocated and appended page descriptors without validating the count against the dump size. This can cause denial of service through excessive memory consumption and processing time. This issue is fixed in version 6.2.0.

EUVD references (5)

Affected products (1)
VendorProductVersionsPlatforms
radareorg radare2 < 6.2.0 (affected) —

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (5)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (10)

  • Security Update Guide - Microsoft
    web:msrc.microsoft.com

    The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

    2026-09-23 15:43 UTC
  • Security Update Guide - Microsoft Security Response Center
    web:msrc.microsoft.com

    Security Update Guide - Microsoft Security Response Center

    2026-09-23 15:43 UTC
  • Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva
    web:senserva.com

    Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

    2026-09-23 15:43 UTC
  • Description of the security update for Excel 2016: August 11, 2026 ...
    web:support.microsoft.com

    Note To apply this security update, you must have the release version of Excel 2016 installed on the computer.

    2026-09-23 15:43 UTC
  • July 18, 2026—Hotpatch KB5121768 (OS Builds 26200.8893 and 26100.8893 ...
    web:support.microsoft.com

    This out-of-band (OOB) update for Windows 11, version 25H2 and Windows 11, version 24H2 (KB5121768) is cumulative. It includes all improvements from previous security and non-security updates, along with an additional fix . Improvements This OOB update includes the following improvement: [System Performance] This update addresses an issue affecting a limited number of devices with an Intel ...

    2026-09-23 15:43 UTC
  • August 2026 CVE Advisory Notification - Security
    web:support.servicenow.com

    Due to additional analysis provided by the security researcher who discovered CVE - 2026 -6876, we have upgraded the severity rating of CVE - 2026 -6876 from High to Critical. This change affects only the severity

    2026-09-23 15:43 UTC
  • Patch Tuesday September 2026 | Action1
    web:www.action1.com

    Microsoft Vulnerabilities Microsoft's September 2026 Patch Tuesday is the largest on record, with 995 patches, a volume unlike anything we've seen before and just shy of the 1,000 mark. The release includes 119 critical vulnerabilities and two zero-days, both elevation-of-privilege flaws: CVE - 2026 -81963 in the Windows Update Stack and CVE - 2026 -85880 in Windows Advanced Local Procedure Call ...

    2026-09-23 15:43 UTC
  • Microsoft August 2026 Patch Tuesday fixes 400 flaws, 3 zero-days
    web:www.bleepingcomputer.com

    Today is Microsoft's August 2026 Patch Tuesday, and with it comes security updates for a massive 400 flaws, including one actively exploited and two publicly disclosed zero-day vulnerabilities.

    2026-09-23 15:43 UTC
  • July Patch RoguePlanet Tuesday Kills Windows Kerberos RC4 Rollback ...
    web:www.techtimes.com

    July 2026 Patch Tuesday permanently removes the Kerberos RC4 rollback registry key on July 14, leaving service accounts with RC4-only material unable to authenticate. Administrators must also ...

    2026-09-23 15:43 UTC
  • Patch Tuesday September 2026: Security Updates & CVE Analysis
    web:zecurit.com

    Get the complete breakdown of Microsoft's September 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

    2026-09-23 15:43 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-81886.json.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-81886",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-22T17:33:05.317028Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-22T17:44:33.102Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "radare2",
          "vendor": "radareorg",
          "versions": [
            {
              "status": "affected",
              "version": "< 6.2.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Windows 64-bit crash-dump dmp64 parser was vulnerable because the Windows dmp64 parser used an input-controlled physical-memory-run PageCount directly as the bound of a per-page allocation loop. The vulnerability is triggered by opening a small crafted full-memory Windows crash dump. The parser repeatedly allocated and appended page descriptors without validating the count against the dump size. This can cause denial of service through excessive memory consumption and processing time. This issue is fixed in version 6.2.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "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:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-22T15:11:36.343Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/radareorg/radare2/security/advisories/GHSA-3xrx-wh64-8xr8",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/radareorg/radare2/security/advisories/GHSA-3xrx-wh64-8xr8"
        },
        {
          "name": "https://github.com/radareorg/radare2/issues/26224",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/radareorg/radare2/issues/26224"
        },
        {
          "name": "https://github.com/radareorg/radare2/pull/26180",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/radareorg/radare2/pull/26180"
        },
        {
          "name": "https://github.com/radareorg/radare2/commit/a7519fdb4da6835c2cecd8fe248e7dd1133cf17a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/radareorg/radare2/commit/a7519fdb4da6835c2cecd8fe248e7dd1133cf17a"
        },
        {
          "name": "https://github.com/radareorg/radare2/releases/tag/6.2.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/radareorg/radare2/releases/tag/6.2.0"
        }
      ],
      "source": {
        "advisory": "GHSA-3xrx-wh64-8xr8",
        "discovery": "UNKNOWN"
      },
      "title": "radare2: Uncontrolled memory allocation in radare2 dmp64 parser"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-81886",
    "datePublished": "2026-09-22T15:11:36.343Z",
    "dateReserved": "2026-08-27T17:48:42.122Z",
    "dateUpdated": "2026-09-22T17:44:33.102Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}