Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2026-33986— FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write

CVSS 7.5 · High EPSS 0.05% · P15
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-33986

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
FreeRDP: H.264 YUV Buffer Dimension Desync - Heap OOB Write
Source: NVD (National Vulnerability Database)
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in yuv_ensure_buffer() in libfreerdp/codec/h264.c, h264->width and h264->height are updated before the reallocation loop. If any winpr_aligned_recalloc() call fails, the function returns FALSE but width/height are already inflated. This issue has been patched in version 3.24.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
FreeRDP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP 3.24.2之前版本存在安全漏洞，该漏洞源于yuv_ensure_buffer函数中在重新分配循环前更新宽度和高度，如果任何重新分配调用失败，可能导致宽度和高度值异常膨胀。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
FreeRDPFreeRDP < 3.24.2 -

II. Public POCs for CVE-2026-33986

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 11437 chars
Paid plan includes:
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-33986

请登录查看更多情报信息。

Same Patch Batch · FreeRDP · 2026-03-30 · 9 CVEs total

CVE-2026-339847.5 HIGHFreeRDP: ClearCodec resize_vbar_entry() Heap OOB Write
CVE-2026-339827.1 HIGHFreeRDP: Persistent Cache Allocator Mismatch - Heap OOB Read
CVE-2026-339877.1 HIGHFreeRDP: Persistent Cache bmpSize Desync - Heap OOB Write
CVE-2026-339836.5 MEDIUMFreeRDP: Progressive Codec Quant BYTE Underflow - UB + CPU DoS
CVE-2026-339855.9 MEDIUMFreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read
CVE-2026-339955.3 MEDIUMFreeRDP: Possible double free in kerberos_AcceptSecurityContext
CVE-2026-33952FreeRDP: DoS via WINPR_ASSERT in rts_read_auth_verifier_no_checks
CVE-2026-33977FreeRDP: DoS via WINPR_ASSERT in IMA ADPCM audio decoder (dsp.c:331)

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-122

V. Comments for CVE-2026-33986

No comments yet

Leave a comment