CVE-2026-110839

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{"bugzilla": {"description": "freerdp: FreeRDP: Denial of Service via grayscale JPEG clipboard conversion", "id": "2552996", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2552996"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in FreeRDP. This vulnerability allows a malicious Remote Desktop Protocol (RDP) server to cause client memory corruption and a Denial of Service (DoS) by offering a specially crafted grayscale JPEG image through clipboard redirection. When the client converts the image into bitmap data during a paste operation, an incorrect buffer size calculation causes data to be written beyond the allocated heap boundaries, crashing the application."], "mitigation": {"lang": "en:us", "value": "If clipboard redirection is unused, disable it. Restrict FreeRDP clients to trusted servers."}, "name": "CVE-2026-110839", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "impact": "important", "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": "2026-10-14T22:52:14Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-110839\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-110839\nhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-99p4-8j24-wvj4\nhttps://www.vulncheck.com/advisories/freerdp-3.3.0-before-3.32.0-heap-out-of-bounds-write-via-grayscale-jpeg-clipboard-data"], "statement": "This flaw is rated Important because a malicious RDP endpoint can trigger a heap out-of-bounds write during JPEG clipboard conversion after the user connects (UI:R), impacting integrity and availability (CVSS 7.1). Platform hardening may impede reliable exploitation but does not remove I:L/A:H from the base score.", "threat_severity": "Important"}

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