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{"bugzilla": {"description": "freerdp: freerdp: Denial of Service via crafted clipboard bitmap image", "id": "2554616", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554616"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-191", "details": ["FreeRDP from 3.14.1 before 3.32.0 contains an integer underflow in the WinPR BMP writer, where a mismatched stride calculation passes SIZE_MAX - 3 to Stream_Zero for sub-byte images. A malicious RDP clipboard peer can return a crafted 1-bpp BMP processed by clipboard_synthesize_image_format_to_bmp for CF_DIB/CF_DIBV5, crashing the client or causing an out-of-bounds write.", "A flaw was found in FreeRDP. An integer underflow vulnerability exists in its bitmap image processing component due to an incorrect calculation when handling sub-byte images. A remote attacker acting as a malicious peer in a Remote Desktop Protocol (RDP) session can exploit this by supplying a specially crafted bitmap image through clipboard data exchange. This flaw can cause the client application to crash, leading to a Denial of Service (DoS), or potentially result in an out-of-bounds memory write."], "mitigation": {"lang": "en:us", "value": "Connect FreeRDP clients only to trusted remote peers and avoid accepting clipboard content from untrusted RDP sessions. If clipboard redirection is not needed, disable clipboard sharing in the FreeRDP client."}, "name": "CVE-2026-111881", "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": "2026-10-17T18:46:09Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-111881\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-111881\nhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-27m7-gwhh-6hhf\nhttps://www.vulncheck.com/advisories/freerdp-3.14.1-before-3.32.0-integer-underflow-in-bmp-writer-via-clipboard"], "statement": "This flaw is triggered when a FreeRDP client processes crafted clipboard bitmap data from a malicious RDP peer, so User Interaction is Required. Availability is High due to a reliably demonstrated client crash from an integer underflow in the BMP writer. Confidentiality and Integrity are Low for a potential follow-on out-of-bounds write that was not shown to yield controlled corruption or code execution. Red Hat rates this Important (CVSS 7.6). ASLR, NX, and FORTIFY_SOURCE may further limit exploitation beyond denial of service, but they do not eliminate the crash, so Availability remains High.", "threat_severity": "Important"}