CVE-2026-64621 (GCVE-0-2026-64621)

Vulnerability from cvelistv5 – Published: 2026-07-20 12:04 – Updated: 2026-07-21 11:08
VLAI
Title
FreeRDP before 3.28.0 Double-Free via selectedmonitors
Summary
FreeRDP before 3.28.0 (affected 3.x through 3.27.1) contains a double-free vulnerability in freerdp_client_rdp_file_apply_to_settings() (client/common/file.c) when parsing the selectedmonitors field of a .rdp connection file. The MonitorIds array is allocated through the settings object, and a raw non-owning pointer to it is freed on the strtoul error path without clearing settings->MonitorIds, leaving it dangling; at teardown freerdp_settings_free() frees the same buffer again. An attacker who convinces a victim to open a crafted .rdp file with oversized monitor tokens can trigger a size-controlled double-free in any FreeRDP CLI client (xfreerdp/sdl-freerdp/wlfreerdp) in the default configuration.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.3 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
FreeRDP FreeRDP Affected: 0 , < 3.28.0 (semver)
Unaffected: 3.28.0 (semver)
Create a notification for this product.
Date Public
2026-07-06 00:00
Credits
DavidKorczynski
Show details on NVD website
To clipboard 

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    "dateReserved": "2026-07-20T11:58:54.524Z",
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    "redhat_vex": {
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      "cve": "CVE-2026-64621",
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      "product_status:known_affected": "31",
      "source": "Red Hat CSAF VEX",
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      "title": "FreeRDP: FreeRDP: Double-free vulnerability via crafted .rdp file leading to potential remote code execution",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64621.json",
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}



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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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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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