CVE-2026-33984

HIGH EPSS 15.3%
Published Mar 30, 20263mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 30, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in resize_vbar_entry() in libfreerdp/codec/clear.c, vBarEntry->size is updated to vBarEntry->count before the winpr_aligned_recalloc() call. If realloc fails, size is inflated while pixels still points to the old, smaller buffer. On a subsequent call where count <= size (the inflated value), realloc is skipped. The caller then writes count * bpp bytes of attacker-controlled pixel data into the undersized buffer, causing a heap buffer overflow. This issue has been patched in version 3.24.2.

CVSS Details

Base Score
7.5
Exploitability
1.6
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
15.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-122
CWE-131

Affected Products 1

VendorProductVersionRange
freerdpfreerdp* <3.24.2

References 2

  • github.com https://github.com/FreeRDP/FreeRDP/commit/dc7fdb165095139be779a4000199bc1706b06ad5
    Patch
  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8469-2xcx-frf6
    PatchVendor Advisory

Remediation

  • github.com https://github.com/FreeRDP/FreeRDP/commit/dc7fdb165095139be779a4000199bc1706b06ad5
    Patch
  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8469-2xcx-frf6
    PatchVendor Advisory