CVE-2026-109677

Medium

Description

FreeRDP from 2.0.0-beta1 before 3.28.0 contains an out-of-bounds read vulnerability in smartcard_LocateCardsByATRA_Call because the ATR pattern cbAtr byte count is not capped. Malicious RDP servers can send crafted ATR mask arrays to use query timing as an oracle, leaking heap memory bit-by-bit to defeat ASLR and aid RCE exploits.

SeverityMedium

CVSS6.5

Exploit probability—

ProductFreerdp

PublishedOct 13, 2026

First seenOct 13, 2026

Weakness typeCWE-125Out-of-bounds read

How to fix

Update

freerdp freerdp3.28.0 or later

Patches

github.com/FreeRDP/FreeRDP/commit/ececc5cbd0646ef012ca178322e6ef922a11f0c1

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8m97-wwx3-r8vj

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	2.0.0 ≤ v < 3.28.0	3.28.0

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