CVE-2026-109243

4.4Medium

Published 12 Oct 2026 · NVD status: Undergoing Analysis · AI triage by gemini-3.8-flash

4.4Medium

Attack vector: Local
Complexity: High
Privileges needed: Low
User interaction: Required
Impact: High impact on confidentiality
Weakness: CWE-732

Impact

Local attackers on multi-user Unix hosts can steal PKINIT private keys from a shared temporary directory during soft-smartcard logon. They need existing local user access and must time the read while another user authenticates.

Root cause

The crypto_write_pem function writes private key files to disk without restricting file permissions to the owner.

Affected systems

FreeRDP 3.0.0 before 3.32.0 on Unix hosts

CVSS v3.1 · CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

Fix & remediation

Upgrade FreeRDP to version 3.32.0 or later. If upgrading immediately is not possible, avoid using soft-smartcard authentication on shared multi-user systems.

shell

$ sudo apt-get update && sudo apt-get install --only-upgrade freerdp2-x11 || sudo apt-get install --only-upgrade freerdp3-x11

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD description

FreeRDP from 3.0.0 before 3.32.0 contains an incorrect permission assignment vulnerability that allows local users to read private keys written by crypto_write_pem without owner-only permissions. Attackers on multi-user Unix hosts can enumerate the shared temporary directory during soft-smartcard logon to read the world-readable PKINIT private-key copy.

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-109243