GHSA-GVVW-8J96-8G5R

Vulnerability from github – Published: 2026-04-16 01:04 – Updated: 2026-05-08 15:19
VLAI
Summary
MsQuic has a Remote Elevation of Privilege Vulnerability
Details

Summary

Improper input validation in Microsoft QUIC allows an unauthorized attacker to elevate privileges over a network.

Details

Improper Input Validation Integer Underflow (Wrap or Wraparound) when decoding ACK frame.

Patches

  • Fix underflow in ACK frame parsing - 1e6e999b

Impact

An attacker who successfully exploited this vulnerability could gain elevated privileges.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Native.Quic.MsQuic.OpenSSL"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.5.0-ci.532574"
            },
            {
              "fixed": "2.5.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Native.Quic.MsQuic.Schannel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.5.0-ci.532574"
            },
            {
              "fixed": "2.5.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Native.Quic.MsQuic.Schannel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.18"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "NuGet",
        "name": "Microsoft.Native.Quic.MsQuic.OpenSSL"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.18"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32179"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-191"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-16T01:04:03Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "### Summary\nImproper input validation in Microsoft QUIC allows an unauthorized attacker to elevate privileges over a network.\n\n### Details\n Improper Input Validation Integer Underflow (Wrap or Wraparound) when decoding ACK frame.\n\n#### Patches\n- Fix underflow in ACK frame parsing - 1e6e999b\n\n### Impact\nAn attacker who successfully exploited this vulnerability could gain elevated privileges.",
  "id": "GHSA-gvvw-8j96-8g5r",
  "modified": "2026-05-08T15:19:44Z",
  "published": "2026-04-16T01:04:03Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/msquic/security/advisories/GHSA-gvvw-8j96-8g5r"
    },
    {
      "type": "WEB",
      "url": "https://github.com/microsoft/msquic/commit/1e6e999b199430effeefee3d85baa0c9dd35ad5e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/microsoft/msquic"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "MsQuic has a Remote Elevation of Privilege Vulnerability"
}



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