Buffer Overflow Affecting freerdp3 package, versions <3.31.0+dfsg-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.46% (38th percentile)

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  • Snyk IDSNYK-DEBIAN14-FREERDP3-19828733
  • published16 Sept 2026
  • disclosed15 Sept 2026

Introduced: 15 Sep 2026

CVE-2026-91953  (opens in a new tab)
CWE-120  (opens in a new tab)

How to fix?

Upgrade Debian:14 freerdp3 to version 3.31.0+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp3 package and not the freerdp3 package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

FreeRDP versions before 3.31.0 contain a heap buffer overflow vulnerability in nego_send_negotiation_request() that fails to validate the LB_LOAD_BALANCE_INFO field length before writing to a fixed 512-byte buffer. A malicious RDP server or man-in-the-middle can send a Server Redirection PDU with an oversized LB_LOAD_BALANCE_INFO value to overflow the buffer with attacker-controlled content, causing denial of service or heap corruption before authentication completes.

CVSS Base Scores

version 3.1