CVE-2026-33987

HIGH

FreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write

Title source: cna

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in persistent_cache_read_entry_v3() in libfreerdp/cache/persistent.c, persistent->bmpSize is updated before winpr_aligned_recalloc(). If realloc fails, bmpSize is inflated while bmpData points to the old buffer. This issue has been patched in version 3.24.2.

References (2)

[X_Refsource_Confirm] https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-ff8h-p5vc-wcwc

[X_Refsource_Misc] https://github.com/FreeRDP/FreeRDP/commit/1a890eb43492b5eb707cb3dd6fc908f696e8fc1c

View Writeup ZIP pw:eip

Scores

CVSS v3 7.1

EPSS 0.0001

EPSS Percentile 2.2%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-122 CWE-131

Status published

Products (2)

freerdp/freerdp < 3.24.2

FreeRDP/FreeRDP < 3.24.2

Published Mar 30, 2026

Tracked Since Mar 31, 2026