CVE-2026-67304

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{"bugzilla": {"description": "FreeRDP: FreeRDP: Denial of Service via null pointer dereference in smartcard cleanup", "id": "2510034", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2510034"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard device control request cleanup when reader-state decoding fails. Attackers can send malformed smartcard IRP requests with non-zero cReaders and truncated reader-state data to crash the process via null pointer access in free_reader_states functions.", "A null pointer dereference flaw in FreeRDP allows a remote attacker to cause a denial of service (DoS) via specially crafted smartcard requests. If reader-state decoding fails, the system attempts to free uninitialized states during cleanup, resulting in a process crash."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, disable smartcard redirection in FreeRDP client configurations if smartcard functionality is not required. This can typically be achieved by launching the `xfreerdp` client without the `/smartcard` option, or by explicitly setting `/smartcard:no` if a configuration file is used. Disabling smartcard redirection will prevent the use of smartcard devices with FreeRDP sessions."}, "name": "CVE-2026-67304", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-01T12:22:17Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-67304\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-67304\nhttps://github.com/FreeRDP/FreeRDP/commit/1cc783d4c78bd2f66d3a8582dfe70a663d141444\nhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-78jj-45vh-jpm5\nhttps://www.vulncheck.com/advisories/freerdp-before-null-dereference-via-smartcard-cleanup"], "statement": "This Moderate-impact vulnerability causes a denial of service (DoS) in FreeRDP clients and proxies. If smartcard redirection is enabled, an attacker (via a malicious server or proxy client) can send specially crafted smartcard IRP requests to trigger a null pointer dereference during cleanup.\nNote: FreeRDP packages shipped in Red Hat Enterprise Linux (RHEL) 9 and older are not affected.", "threat_severity": "Moderate"}

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