FreeRDP up to 3.24.1 persistent.c persistent_cache_read_entry_v3 heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k4.64-

Summaryinfo

A vulnerability identified as critical has been detected in FreeRDP up to 3.24.1. This affects the function persistent_cache_read_entry_v3 of the file libfreerdp/cache/persistent.c. Performing a manipulation results in heap-based overflow. This vulnerability is cataloged as CVE-2026-33987. The attack must be initiated from a local position. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in FreeRDP up to 3.24.1. This affects the function persistent_cache_read_entry_v3 of the file libfreerdp/cache/persistent.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-33987 since 03/24/2026. The exploitability is told to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 3.24.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-17235). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreeRDP 3.24.2

Timelineinfo

03/24/2026 CVE reserved
03/30/2026 +6 days VulDB entry created
03/31/2026 +0 days Advisory disclosed
03/31/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-33987 (🔒)
GCVE (CVE): GCVE-0-2026-33987
GCVE (VulDB): GCVE-100-354279
EUVD: 🔒

Entryinfo

Created: 03/31/2026 00:21
Updated: 03/31/2026 02:30
Changes: 03/31/2026 00:21 (65), 03/31/2026 02:30 (1)
Complete: 🔍
Cache ID: 216:BEE:103

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