{"schemaVersion":3,"id":"CVE-2026-55648","aliases":["UBUNTU-CVE-2026-55648","DEBIAN-CVE-2026-55648"],"status":"published","duplicateOf":null,"title":null,"description":"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-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.","dates":{"published":"2026-08-19T17:48:51.223Z","modified":"2026-08-21T21:49:23.791Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":6.1,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Ubuntu","score":6.1,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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Overflow or Wraparound","description":"The product performs a calculation that can\n         produce an integer overflow or wraparound when the logic\n         assumes that the resulting value will always be larger than\n         the original value. This occurs when an integer value is\n         incremented to a value that is too large to store in the\n         associated representation. When this occurs, the value may\n         become a very small or negative number.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/190.html"}],"affected":[{"vendor":"debian","product":"freerdp2","name":"freerdp2","label":"freerdp2","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/freerdp2","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"debian","product":"freerdp3","name":"freerdp3","label":"freerdp3","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/freerdp3","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 3.27.0+dfsg-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 3.27.0+dfsg-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"freerdp","name":"freerdp","label":"freerdp","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/freerdp","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"freerdp2","name":"freerdp2","label":"freerdp2","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/freerdp2","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"freerdp3","name":"freerdp3","label":"freerdp3","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/freerdp3","purlType":"deb","versions":[{"text":"< 3.30.0+dfsg-0ubuntu0.24.04.1","noFixRecorded":false,"fixedIn":null},{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 3.30.0+dfsg-0ubuntu0.26.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.30.0+dfsg-0ubuntu0.24.04.1 | All versions (No fix recorded) | < 3.30.0+dfsg-0ubuntu0.26.04.1","eol":null,"hubHref":null},{"vendor":"freerdp","product":"freerdp","name":"freerdp","label":"freerdp","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.27.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.27.0","eol":null,"hubHref":"/vendor/freerdp/freerdp"}],"affectedCount":6,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5c5v-f78v-h2f6","label":"github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5c5v-f78v-h2f6","hostname":"github.com","tags":["X Refsource CONFIRM","REPORT","Mitigation","Vendor Advisory"]},{"url":"https://github.com/FreeRDP/FreeRDP/pull/12877","label":"github.com/FreeRDP/FreeRDP/pull/12877","hostname":"github.com","tags":["X Refsource MISC","Issue Tracking","Patch"]},{"url":"https://github.com/FreeRDP/FreeRDP/commit/e4ae473da2926724d9b6329778797a3bdea79eb3","label":"github.com/FreeRDP/FreeRDP/commit/e4ae473da2926724d9b6329778797a3bdea79eb3","hostname":"github.com","tags":["X Refsource MISC","Patch"]},{"url":"https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0","label":"github.com/FreeRDP/FreeRDP/releases/tag/3.27.0","hostname":"github.com","tags":["X Refsource MISC","Release Notes"]},{"url":"https://ubuntu.com/security/CVE-2026-55648","label":"ubuntu.com/security/CVE-2026-55648","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55648","label":"www.cve.org/CVERecord?id=CVE-2026-55648","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8561-1","label":"ubuntu.com/security/notices/USN-8561-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-55648","label":"security-tracker.debian.org/tracker/CVE-2026-55648","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0383","OPENSUSE-SU-2026:11065-1","USN-8561-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:11065-1","USN-8561-1"]},"timeline":[{"kind":"published","date":"2026-08-19T17:48:51.223Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-21T21:49:23.791Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T05:46:04.105Z","stale":false,"partial":false}}