{"id":"CVE-2026-55648","title":"FreeRDP is a free implementation of the Remote Desktop Protocol","summary":"FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, freerdp_image_copy_from_icon_data in libfreerdp/codec/color.c calculates nWidth multiplied by nHeight multiplied by FreeRDPGetBytesPerPixel(format) in 32-b…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-190","CWE-125"],"vendor":"freerdp","product":"freerdp","affected":["freerdp < 3.27.0"],"patched":["freerdp 3.27.0"],"published":"2026-08-19","updated":"2026-09-24","sourceUpdated":"2026-09-24T15:14:57.957","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55648","references":[{"url":"https://github.com/FreeRDP/FreeRDP/commit/e4ae473da2926724d9b6329778797a3bdea79eb3","label":"security-advisories@github.com"},{"url":"https://github.com/FreeRDP/FreeRDP/pull/12877","label":"security-advisories@github.com"},{"url":"https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0","label":"security-advisories@github.com"},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5c5v-f78v-h2f6","label":"security-advisories@github.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55648.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-55648"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2519816"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55648"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55648"}],"tags":["nvd","csaf","vex","red-hat","score-dispute"],"epss":0.00432,"epssPercentile":0.37368,"ingestedAt":"2026-08-22T21:37:49.983Z","scores":{"nvd":7.5,"vendor":4.3},"slug":"CVE-2026-55648","body":"## Overview\n\nFreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, freerdp_image_copy_from_icon_data in libfreerdp/codec/color.c calculates nWidth multiplied by nHeight multiplied by FreeRDPGetBytesPerPixel(format) in 32-bit arithmetic. A malicious RDP server can send a RAIL TS_ICON_INFO update with dimensions such as 32768 by 32768 and 32 bits per pixel so the required-size calculation wraps, bypassing the cbBitsColor source bounds check before freerdp_image_copy_no_overlap reads attacker-controlled icon data. This affects RemoteApp clients using the vulnerable library path, while xfreerdp has a caller-side mitigation. This issue is fixed in version 3.27.0.\n\n## Affected\n\n- `freerdp < 3.27.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `freerdp 3.27.0`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55648.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":210178,"id":"CVE-2026-55648","ts":1790264791885,"field":"cvss","old":null,"new":"7.5"},{"seq":210177,"id":"CVE-2026-55648","ts":1790264791885,"field":"severity","old":"none","new":"high"}]}