FreeRDP before 3.31.0 Out-of-bounds Read via Smartcard ATR

Advisories

FreeRDP before 3.31.0 Out-of-bounds Read via Smartcard ATR

severity: high
date: 9/15/2026
Affecting: FreeRDP >= 3.28.0, < 3.31.0
CVE: CVE-2026-91945
CWE: CWE-125 Out-of-bounds Read
CVSS: 7.1
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References: GitHub Security Advisory (GHSA-q65v-4w7q-hx3r)
Patch Commit
Credit: sam4k
Description: FreeRDP versions before 3.31.0 contain an out-of-bounds read vulnerability in smartcard response decoders that fail to validate ATR length fields against fixed inline arrays. Authenticated RDP clients can send oversized ATR lengths in PAKID_CORE_DEVICE_IOCOMPLETION responses to trigger reads past stack or heap objects, causing process termination.

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