Vulnerability · Published Oct 13, 2026 · Assigned by VulnCheck

CVE-2026-109677FreeRDP 2.0.0-beta1 before 3.28.0 Out-of-Bounds Read via LocateCardsByATRA Handler

Medium 6.5

In plain English

A medium-severity out-of-bounds read in FreeRDP from FreeRDP. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 71.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-109677
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-109677
Debian:14	freerdp3	3.28.0+dfsg-1	DEBIAN-CVE-2026-109677
Ubuntu:22.04:LTS	freerdp2	no fix listed	UBUNTU-CVE-2026-109677
Ubuntu:24.04:LTS	freerdp3	3.30.0+dfsg-0ubuntu0.24.04.1	UBUNTU-CVE-2026-109677
Ubuntu:26.04:LTS	freerdp3	3.30.0+dfsg-0ubuntu0.26.04.1	UBUNTU-CVE-2026-109677

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	2.0.0-beta1 – before 3.28.0

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-8m97-wwx3-r8vj) vendor-advisory
Patch Commit patch
VulnCheck Advisory: FreeRDP 2.0.0-beta1 before 3.28.0 Out-of-Bounds Read via LocateCardsByATRA Handler third-party-advisory