Medium [CVE-2026-67288] Denial of Service via crafted smartcard cache requests
This medium-severity Red Hat Linux advisory covers CVE-2026-67288 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8.
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Summary
FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard cache request decoders that accept NULL NDR pointers for LookupName in SCARD_IOCTL_READCACHEA and SCARD_IOCTL_WRITECACHEA operations.
When smartcard emulation is enabled, attackers can send crafted smartcard cache requests with NULL lookup-name pointers to trigger strlen() on a null pointer, causing client process termination. A flaw was found in FreeRDP.
This can lead to a null pointer dereference, causing the client process to terminate and disrupting active remote desktop sessions. A Moderate denial of service flaw affects FreeRDP in Red Hat products.
When smartcard emulation is enabled, a remote attacker can exploit this vulnerability by sending malformed smartcard cache requests, leading to a null pointer dereference and subsequent termination of the FreeRDP client process. This can disrupt active remote desktop sessions for affected users.
Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-476.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: freerdp.
- < 3.29.0
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- If smartcard redirection/emulation is unused, do not enable it (omit /smartcard and /smartcard-logon, or start with /smartcard:off). Only connect FreeRDP clients to trusted RDP endpoints
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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