CVE-2026-109246

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{"bugzilla": {"description": "freerdp: freerdp: Denial of Service via divide-by-zero error in shadow server", "id": "2549822", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2549822"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-369", "details": ["FreeRDP before 3.32.0 contains a divide-by-zero vulnerability in the freerdp-shadow-cli shadow server: the frame id in a client's Frame Acknowledge PDU is stored without a range check, so the in-flight frame count in shadow_encoder_inflight_frames() can underflow. An authenticated client can acknowledge a frame id one greater than the last frame sent, causing shadow_encoder_create_frame_id() to divide by zero (SIGFPE) and terminate the process, disconnecting all viewers.", "A flaw was found in FreeRDP. An authenticated client can trigger a Denial of Service (DoS) by sending a specially crafted frame acknowledgment message to the shadow server. Due to missing input validation on the frame identifier, an arithmetic error causes a divide-by-zero condition. This terminates the shadow server process, abruptly disconnecting all active session viewers."], "name": "CVE-2026-109246", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-10-12T16:04:21Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-109246\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-109246\nhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-6vjv-4hm3-6698\nhttps://www.vulncheck.com/advisories/freerdp-before-3.32.0-shadow-server-divide-by-zero-via-frame-acknowledge-pdu"], "threat_severity": "Moderate"}

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