CVE-2026-109948— FreeRDP 3.0.0 before 3.32.0 Memory Disclosure via SCardTransmit Smartcard Redirection
Quick assessment
Affected
FreeRDP FreeRDP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
FreeRDP 3.0.0 至 3.32.0（不含）版本在 smartcard_Transmit_Call 函数中存在一个未初始化内存泄露漏洞，攻击者可利用该漏洞通过恶意 RDP 服务器读取客户端内存。攻击者可以向 RDP 服务器发送带有无效卡句柄和非零接收长度的 SCardTransmit 请求，从而导致 smartcard_pack_transmit_return 函数序列化最多 66,560 字节的未初始化堆内存数据，造成敏感信息泄露。
Possible ATT&CK Techniques 1 AI
T1005 · Data from Local System
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I. Basic Information for CVE-2026-109948
Vulnerability Information
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Vulnerability Title
FreeRDP 3.0.0 before 3.32.0 Memory Disclosure via SCardTransmit Smartcard Redirection
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP from 3.0.0 before 3.32.0 contains an uninitialized memory disclosure vulnerability in smartcard_Transmit_Call that allows malicious RDP servers to read client memory. Servers can send SCardTransmit requests with an invalid card handle and nonzero receive length, causing smartcard_pack_transmit_return to serialize up to 66,560 uninitialized heap bytes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-109948
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-109948 (1)
Same Patch Batch · FreeRDP · 2026-10-13 · 21 CVEs total
| CVE-2026-109676 | 8.8 HIGH | FreeRDP 3.0.0-beta1 before 3.32.0 Use-After-Free via Smartcard Connect |
| CVE-2026-109678 | 6.5 MEDIUM | FreeRDP 3.0.0-beta1 before 3.32.0 Reachable Assertion via Emulated SCardStatusA |
| CVE-2026-109677 | 6.5 MEDIUM | FreeRDP 2.0.0-beta1 before 3.28.0 Out-of-Bounds Read via LocateCardsByATRA Handler |
| CVE-2026-109942 | 6.5 MEDIUM | FreeRDP 2.3.0 before 3.32.0 NULL Pointer Dereference via RD Gateway Close Channel Packet |
| CVE-2026-109941 | 6.5 MEDIUM | FreeRDP 2.3.0 before 3.32.0 Infinite Loop via RD Gateway Chunked Response |
| CVE-2026-109938 | 6.5 MEDIUM | FreeRDP 3.11.0 before 3.32.0 Integer Overflow via Mapped Video Geometry Update |
| CVE-2026-109946 | 6.5 MEDIUM | FreeRDP 3.11.0 before 3.32.0 Reachable Assertion via AVC444 Odd Region Width |
| CVE-2026-109944 | 6.5 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Reachable Assertion via Stale Smartcard Handle |
| CVE-2026-109939 | 6.5 MEDIUM | FreeRDP 3.27.1 before 3.32.0 NULL Pointer Dereference via Cache Bitmap V3 Order |
| CVE-2026-109943 | 6.5 MEDIUM | FreeRDP 3.29.0 before 3.32.0 Double Free via Async-Update Polygon Order |
| CVE-2026-109947 | 6.5 MEDIUM | FreeRDP 3.20.1 before 3.32.0 Unbounded Allocation via drive_process_irp_read |
| CVE-2026-109949 | 6.5 MEDIUM | FreeRDP 3.0.0 before 3.32.0 PIN Brute-Force via Virtual Smartcard |
| CVE-2026-109953 | 5.3 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Cleartext Credential Disclosure via /restricted-admin |
| CVE-2026-109952 | 5.3 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Security Protocol Downgrade via Negotiation Response |
| CVE-2026-109680 | 5.3 MEDIUM | FreeRDP 3.18.0 before 3.32.0 Heap Out-of-Bounds Write via ARM Redirected Username |
| CVE-2026-109945 | 5.3 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Smartcard Use-After-Free via Concurrent Disconnect and Transmi |
| CVE-2026-109679 | 5.3 MEDIUM | FreeRDP 3.0.0-beta4 before 3.32.0 NULL Pointer Crash via ARM Response |
| CVE-2026-109951 | 5.3 MEDIUM | FreeRDP 3.17.1 before 3.32.0 Heap Buffer Over-Read via Proxy DRDYNVC Channel Name |
| CVE-2026-109940 | 4.3 MEDIUM | FreeRDP 3.0.0-beta1 before 3.32.0 Stack Buffer Overflow via PKCS#11 Key Name |
| CVE-2026-109950 | 4.3 MEDIUM | FreeRDP 3.0.0 before 3.32.0 Heap Out-of-Bounds Read via RD Gateway Messages |
IV. Related Vulnerabilities
Same product: FreeRDP
-
CVE-2026-109953
FreeRDP 3.0.0 before 3.32.0 Cleartext Credential Disclosure -
CVE-2026-109952
FreeRDP 3.0.0 before 3.32.0 Security Protocol Downgrade via -
CVE-2026-109951
FreeRDP 3.17.1 before 3.32.0 Heap Buffer Over-Read via Proxy -
CVE-2026-109949
FreeRDP 3.0.0 before 3.32.0 PIN Brute-Force via Virtual Smar -
CVE-2026-109950
FreeRDP 3.0.0 before 3.32.0 Heap Out-of-Bounds Read via RD G
Same vendor: FreeRDP
-
CVE-2026-109953
FreeRDP 3.0.0 before 3.32.0 Cleartext Credential Disclosure -
CVE-2026-109952
FreeRDP 3.0.0 before 3.32.0 Security Protocol Downgrade via -
CVE-2026-109951
FreeRDP 3.17.1 before 3.32.0 Heap Buffer Over-Read via Proxy -
CVE-2026-109950
FreeRDP 3.0.0 before 3.32.0 Heap Out-of-Bounds Read via RD G -
CVE-2026-109949
FreeRDP 3.0.0 before 3.32.0 PIN Brute-Force via Virtual Smar
Same weakness: CWE-200
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FOG adInfo endpoint is reported to disclose the Active Direc -
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CVE-2026-77572
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CVE-2026-73135
Gitea hidden-owner repository listing disclosure
V. Comments for CVE-2026-109948
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