{"id":"CVE-2026-121391","kind":"vulnerability","aliases":["CVE-2026-121391"],"related":[],"title":"FreeRDP: repeated create requests leak file descriptors and crash the client","description":"FreeRDP from 3.0.0 before 3.32.2 contains a file descriptor leak in parallel_process_irp_create that fails to close previous descriptors on repeated IRP_MJ_CREATE requests. A hostile RDP server with parallel-device redirection enabled can send repeated CREATE requests to exhaust the client descriptor table and crash the process.","summary":"FreeRDP's parallel device redirection code fails to close file descriptors when a server sends repeated IRP_MJ_CREATE requests. A hostile RDP server can exhaust the client's descriptor table and crash the FreeRDP process.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["freerdp","package","rdp-client","remote-desktop"],"not_affected_if":["parallel-redirection-disabled","trusted-servers-only","versions-below-3.0.0-or-3.32.2-plus"],"how_to_check":"- `xfreerdp --version` or `freerdp --version` to find the installed FreeRDP version\n- Check whether parallel-device redirection (for example `/parallel` in the client command line) is enabled\n- Find the clients and applications that embed FreeRDP and confirm their bundled version","fix":"- FreeRDP from `3.0.0` before `3.32.2`: move to `3.32.2` or later","status":"open","published_at":"2026-11-03T15:17:26+00:00","first_seen_at":"2026-11-03T15:21:57+00:00","triaged_at":"2026-11-03T15:24:37+00:00","updated_at":"2026-11-03T15:24:37+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-11-03T15:24:37Z","model":"claude-haiku-5-5","output":{"fix":"- FreeRDP from `3.0.0` before `3.32.2`: move to `3.32.2` or later","reach":"network","title":"FreeRDP: repeated create requests leak file descriptors and crash the client","impact":"low","summary":"FreeRDP's parallel device redirection code fails to close file descriptors when a server sends repeated IRP_MJ_CREATE requests. A hostile RDP server can exhaust the client's descriptor table and crash the FreeRDP process.","audience":"developers","category":"package","nicknames":[],"who_cares":["freerdp","rdp-client","remote-desktop"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"client process crashes after descriptor exhaustion from a hostile server","analyst_note":"","how_to_check":"- `xfreerdp --version` or `freerdp --version` to find the installed FreeRDP version\n- Check whether parallel-device redirection (for example `/parallel` in the client command line) is enabled\n- Find the clients and applications that embed FreeRDP and confirm their bundled version","plain_action":"","needs_analyst":false,"not_affected_if":["parallel-redirection-disabled","trusted-servers-only","versions-below-3.0.0-or-3.32.2-plus"],"who_is_affected":"Only FreeRDP clients from 3.0.0 up to but not including 3.32.2 are affected, and only when parallel-device redirection is enabled. The attack needs a malicious RDP server the client connects to, so a team that only connects to trusted servers with redirection off can deprioritize it. Builds that embed FreeRDP as a library are affected too and need checking.","user_interaction":"yes","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000727,"input_tokens":4198,"output_tokens":614,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-121391':14A,17A '-2026':13A,16A '3.0.0':64C '3.32.2':66C 'client':11A,22B,53B,107C 'close':34B,80C 'code':31B 'contain':67C 'crash':9A,58B,111C 'creat':3A,44B,76C,87C,102C 'cve':12A,15A 'descriptor':7A,36B,55B,70C,82C,108C 'desktop':25B 'devic':29B,96C 'enabl':98C 'exhaust':51B,105C 'fail':32B,78C 'file':6A,35B,69C 'freerdp':1A,18B,26B,60B,62C 'hostil':47B,90C 'irp':42B,75C,85C 'leak':5A,71C 'mj':43B,86C 'packag':19B 'parallel':28B,73C,95C 'parallel-devic':94C 'previous':81C 'process':61B,74C,113C 'rdp':21B,48B,91C 'rdp-client':20B 'redirect':30B,97C 'remot':24B 'remote-desktop':23B 'repeat':2A,41B,84C,101C 'request':4A,45B,88C,103C 'send':40B,100C 'server':39B,49B,92C 'tabl':56B,109C","nicknames":[],"mitigations":[],"who_affected":"Only FreeRDP clients from 3.0.0 up to but not including 3.32.2 are affected, and only when parallel-device redirection is enabled. The attack needs a malicious RDP server the client connects to, so a team that only connects to trusted servers with redirection off can deprioritize it. Builds that embed FreeRDP as a library are affected too and need checking.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["freerdp","medium","package","rdpclient","remotedesktop"],"first_public_at":"2026-10-19T12:11:52+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-2026-121391","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121391","severity":null,"published_at":"2026-11-03T15:17:26+00:00","modified_at":"2026-11-03T15:17:26+00:00","first_seen_at":"2026-11-03T15:21:57+00:00","fetched_at":"2026-11-03T15:21:57+00:00","note":null}],"documents":[{"id":58305,"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8g9g-hqqp-fw69","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-10-19T12:11:52+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":58306,"url":"https://www.vulncheck.com/advisories/freerdp-before-3.32.2-file-descriptor-exhaustion-via-parallel-create","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"}