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CVE-2026-91952 (GCVE-0-2026-91952)

Vulnerability from cvelistv5 – Published: 2026-09-15 15:18 – Updated: 2026-09-15 15:18
VLAI
Title
FreeRDP before 3.31.0 Denial of Service via pool_decode_rect
Summary
FreeRDP versions before 3.31.0 contain an infinite-loop denial of service in the pool_decode_rect function when decoding AVC444 metablocks with more region rectangles than preallocated worker array size. A malicious RDP server can send crafted AVC444 graphics updates causing the threaded decode path to loop indefinitely, consuming CPU and preventing normal client operation.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
  • CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
Impacted products
Vendor Product Version CPE status
FreeRDP FreeRDP Affected: 0 , < 3.31.0 (semver)
Unaffected: 3.31.0 (semver)
    cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
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Date Public
2026-09-01 00:00
Show details on NVD website
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{
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          "vendor": "FreeRDP",
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          "value": "FreeRDP versions before 3.31.0 contain an infinite-loop denial of service in the pool_decode_rect function when decoding AVC444 metablocks with more region rectangles than preallocated worker array size. A malicious RDP server can send crafted AVC444 graphics updates causing the threaded decode path to loop indefinitely, consuming CPU and preventing normal client operation."
        }
      ],
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            "subConfidentialityImpact": "NONE",
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      ],
      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-835",
              "description": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
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      "providerMetadata": {
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        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-m85m-3qxv-63h5)",
          "tags": [
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          "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m85m-3qxv-63h5"
        },
        {
          "name": "VulnCheck Advisory: FreeRDP before 3.31.0 Denial of Service via pool_decode_rect",
          "tags": [
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      "title": "FreeRDP before 3.31.0 Denial of Service via pool_decode_rect",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-91952",
    "datePublished": "2026-09-15T15:18:09.203Z",
    "dateReserved": "2026-09-15T11:07:34.398Z",
    "dateUpdated": "2026-09-15T15:18:09.203Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "percentile": "0.27989"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T18:31:18+00:00",
      "cve": "CVE-2026-91952",
      "id": "CVE-2026-91952",
      "initial_release_date": "2026-09-15T15:18:09.203000+00:00",
      "product_status:known_affected": "31",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "FreeRDP: FreeRDP: Denial of Service via crafted AVC444 graphics updates",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91952.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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