{"id":"CVE-2026-121403","kind":"vulnerability","aliases":["CVE-2026-121403"],"related":[],"title":"FreeRDP: malformed drive request lets a rogue server exhaust client memory","description":"FreeRDP before 3.32.2 contains a denial of service vulnerability where a malformed drive DEVICE_IOREQUEST with a truncated IRP_MJ_CREATE body silently kills the drive worker. A malicious RDP server can send such an IRP then post further requests that accumulate unbounded in the IrpQueue, exhausting memory and causing session availability loss.","summary":"FreeRDP, a remote desktop client library, silently stops its drive worker when it receives a malformed drive I/O request with a truncated create body. A malicious RDP server can then keep sending requests that pile up in memory until the session fails.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["freerdp","package","rdp-clients","remote-desktop"],"not_affected_if":["drive-redirection-disabled","trusted-servers-only"],"how_to_check":"- Check the installed FreeRDP version (for example `xfreerdp --version`) and compare it to the fixed release in the fix field.\n- Look for applications that bundle FreeRDP and check their version notes; the sources do not name them.","fix":"- FreeRDP versions before `3.32.2`: move to `3.32.2` or later.","status":"open","published_at":"2026-11-03T15:17:28+00:00","first_seen_at":"2026-11-03T15:21:58+00:00","triaged_at":"2026-11-03T15:24:29+00:00","updated_at":"2026-11-03T15:24:29+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-03T15:24:29Z","model":"claude-haiku-5-5","output":{"fix":"- FreeRDP versions before `3.32.2`: move to `3.32.2` or later.","reach":"network","title":"FreeRDP: malformed drive request lets a rogue server exhaust client memory","impact":"low","summary":"FreeRDP, a remote desktop client library, silently stops its drive worker when it receives a malformed drive I/O request with a truncated create body. A malicious RDP server can then keep sending requests that pile up in memory until the session fails.","audience":"businesses","category":"package","nicknames":[],"who_cares":["freerdp","remote-desktop","rdp-clients"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Client session becomes unavailable as memory is exhausted","analyst_note":"","how_to_check":"- Check the installed FreeRDP version (for example `xfreerdp --version`) and compare it to the fixed release in the fix field.\n- Look for applications that bundle FreeRDP and check their version notes; the sources do not name them.","plain_action":"","needs_analyst":false,"not_affected_if":["trusted-servers-only","drive-redirection-disabled"],"who_is_affected":"Anyone running a FreeRDP client with drive redirection connected to an RDP server they do not fully trust. The sources describe a malicious server as the trigger, so clients that only connect to trusted, internal servers carry less risk. unknown for whether drive redirection must be enabled.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000689,"input_tokens":4203,"output_tokens":538,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-121403':14A,17A '-2026':13A,16A '3.32.2':70C 'accumul':109C 'avail':119C 'bodi':49B,89C 'caus':117C 'client':10A,22B,30B 'contain':71C 'creat':48B,88C 'cve':12A,15A 'denial':73C 'desktop':25B,29B 'devic':81C 'drive':3A,35B,42B,80C,93C 'exhaust':9A,114C 'fail':67B 'freerdp':1A,18B,26B,68C 'i/o':43B 'iorequest':82C 'irp':86C,103C 'irpqueu':113C 'keep':56B 'kill':91C 'let':5A 'librari':31B 'loss':120C 'malform':2A,41B,79C 'malici':51B,96C 'memori':11A,63B,115C 'mj':87C 'packag':19B 'pile':60B 'post':105C 'rdp':21B,52B,97C 'rdp-client':20B 'receiv':39B 'remot':24B,28B 'remote-desktop':23B 'request':4A,44B,58B,107C 'rogu':7A 'send':57B,100C 'server':8A,53B,98C 'servic':75C 'session':66B,118C 'silent':32B,90C 'stop':33B 'truncat':47B,85C 'unbound':110C 'vulner':76C 'worker':36B,94C","nicknames":[],"mitigations":[],"who_affected":"Anyone running a FreeRDP client with drive redirection connected to an RDP server they do not fully trust. The sources describe a malicious server as the trigger, so clients that only connect to trusted, internal servers carry less risk. unknown for whether drive redirection must be enabled.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["freerdp","medium","package","rdpclients","remotedesktop"],"first_public_at":"2026-10-19T07:39:25+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121403","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121403","severity":null,"published_at":"2026-11-03T15:17:28+00:00","modified_at":"2026-11-03T15:17:28+00:00","first_seen_at":"2026-11-03T15:21:58+00:00","fetched_at":"2026-11-03T15:21:58+00:00","note":null}],"documents":[{"id":58329,"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5qqp-5ffm-m3p9","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-10-19T07:39:25+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":58330,"url":"https://www.vulncheck.com/advisories/freerdp-before-3.32.2-denial-of-service-via-malformed-drive-irp","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}