CVE-2026-91945

EUVD-2026-78802
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
freerdpfreerdp
3.28.0 ≤
𝑥
< 3.31.0
CNA
Debian logo
Debian Releases
Debian Product
Codename
freerdp2
bookworm
2.11.7+dfsg1-6~deb12u1
fixed
freerdp3
forky
3.31.1+dfsg-1
fixed
sid
3.31.1+dfsg-1
fixed
trixie
3.15.0+dfsg-2.1+deb13u3
fixed
Common Weakness Enumeration
References
https://github.com/FreeRDP/FreeRDP/commit/9626564421df72c84f891afdbc0b20bf702f369f
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q65v-4w7q-hx3r
https://www.vulncheck.com/advisories/freerdp-before-3.31.0-out-of-bounds-read-via-smartcard-atr
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q65v-4w7q-hx3r