Use After Free Affecting libwinpr-devel package, versions <2:2.11.7-1.el9_7.7


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.11% (29th percentile)

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  • Snyk IDSNYK-ALMALINUX9-LIBWINPRDEVEL-16750129
  • published18 May 2026
  • disclosed12 May 2026

Introduced: 12 May 2026

NewCVE-2026-26986  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 libwinpr-devel to version 2:2.11.7-1.el9_7.7 or higher.
This issue was patched in ALSA-2026:16482.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libwinpr-devel package and not the libwinpr-devel package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, rail_window_free dereferences a freed xfAppWindow pointer during HashTable_Free cleanup because xf_rail_window_common calls free(appWindow) on title allocation failure without first removing the entry from the railWindows hash table, leaving a dangling pointer that is freed again on disconnect. Version 3.23.0 fixes the vulnerability.

CVSS Base Scores

version 3.1