Use After Free in Freerdp
CVE-2026-121955
FreeRDP before 3.32.2 contains a use-after-free vulnerability in Emulate_SCardReleaseContext that frees the emulated SCardContext before its worker thread is cancelled and joined. A malicious server can send ESTABLISHCONTEXT, a long-timeout GETSTATUSCHANGE, then RELEASECONTEXT smartcard IRPs to corrupt heap memory or crash clients using smartcard emulation.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-983v-jp34-f3fm (Exploit, vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/freerdp-before-3.32.2-use-after-free-in-smartcard-… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-121955?
- CVE-2026-121955 is a high-severity vulnerability in Freerdp, classified under Use After Free. CVSS score: 7.5/10. Published 2026-11-04.
- How severe is CVE-2026-121955?
- High severity. CVSS v3 base score is 7.5 out of 10.