{"id":"CVE-2026-113421","kind":"vulnerability","aliases":["CVE-2026-113421"],"related":[],"title":"Eclipse ThreadX: unloaded module callback can run with kernel privileges","description":"In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, ThreadX Modules does not revoke a module's trace-buffer-full callback when the module is stopped and unloaded. With event tracing enabled and a kernel-owned trace buffer still active, a later buffer wrap invokes the callback from privileged thread context after the module's code has been released, so a user-mode module can have its code run with kernel privileges after unload, or, once the memory is reused, redirect control flow or cause a fault.","summary":"ThreadX Modules does not clear a module's trace-buffer-full callback when the module is stopped and unloaded. A later trace buffer wrap can then call code that has already been released, running it with kernel privileges or redirecting control flow.","severity":"high","cvss":7.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["embedded","rtos","runtime","threadx"],"not_affected_if":["modules-unused","tracing-disabled"],"how_to_check":"- Check the ThreadX version in use: affected versions are 6.0.1 through 6.5.2.202603.\n- Check whether ThreadX Modules and event tracing are enabled in the build configuration: unknown if the sources do not say which setting.","fix":"- Move to a ThreadX release newer than `6.5.2.202603`: the sources do not name the fixed version.","status":"open","published_at":"2026-11-03T09:17:10+00:00","first_seen_at":"2026-11-03T09:19:50+00:00","triaged_at":"2026-11-03T09:20:17+00:00","updated_at":"2026-11-03T09:20:17+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T09:20:17Z","model":"claude-haiku-5-5","output":{"fix":"- Move to a ThreadX release newer than `6.5.2.202603`: the sources do not name the fixed version.","reach":"local","title":"Eclipse ThreadX: unloaded module callback can run with kernel privileges","impact":"high","summary":"ThreadX Modules does not clear a module's trace-buffer-full callback when the module is stopped and unloaded. A later trace buffer wrap can then call code that has already been released, running it with kernel privileges or redirecting control flow.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["threadx","embedded","rtos"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"Module code runs with kernel privileges after unload, or control flow is redirected.","analyst_note":"Confirm the fixed version and any configuration workaround from the Eclipse vendor advisory linked in the sources.","how_to_check":"- Check the ThreadX version in use: affected versions are 6.0.1 through 6.5.2.202603.\n- Check whether ThreadX Modules and event tracing are enabled in the build configuration: unknown if the sources do not say which setting.","plain_action":"","needs_analyst":true,"not_affected_if":["modules-unused","tracing-disabled"],"who_is_affected":"Systems built on Eclipse ThreadX 6.0.1 through 6.5.2.202603 that use ThreadX Modules with event tracing enabled and a kernel-owned trace buffer. Systems not using ThreadX Modules, or without event tracing, are likely not exposed; the sources do not state this explicitly.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.000721,"input_tokens":4228,"output_tokens":597,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-113421':13A,16A '-2026':12A,15A '6.0.1':68C '6.5.2.202603':70C 'activ':103C 'alreadi':52B 'buffer':31B,44B,81C,101C,106C 'call':48B 'callback':5A,33B,83C,110C 'caus':149C 'clear':25B 'code':49B,119C,132C 'context':114C 'control':62B,146C 'cve':11A,14A 'eclips':1A,65C 'embed':17B 'enabl':94C 'event':92C 'fault':151C 'flow':63B,147C 'full':32B,82C 'invok':108C 'kernel':9A,58B,98C,135C 'kernel-own':97C 'later':42B,105C 'memori':142C 'mode':127C 'modul':4A,22B,27B,36B,72C,77C,86C,117C,128C 'own':99C 'privileg':10A,59B,112C,136C 'redirect':61B,145C 'releas':54B,122C 'reus':144C 'revok':75C 'rtos':18B 'run':7A,55B,133C 'runtim':19B 'still':102C 'stop':38B,88C 'thread':113C 'threadx':2A,20B,21B,66C,71C 'trace':30B,43B,80C,93C,100C 'trace-buffer-ful':29B,79C 'unload':3A,40B,90C,138C 'user':126C 'user-mod':125C 'version':67C 'wrap':45B,107C","nicknames":[],"mitigations":[],"who_affected":"Systems built on Eclipse ThreadX 6.0.1 through 6.5.2.202603 that use ThreadX Modules with event tracing enabled and a kernel-owned trace buffer. Systems not using ThreadX Modules, or without event tracing, are likely not exposed; the sources do not state this explicitly.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["embedded","high","rtos","runtime","threadx"],"first_public_at":"2026-11-01T17:32:52+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/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":"emo@eclipse.org","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-113421","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113421","severity":null,"published_at":"2026-11-03T09:17:10+00:00","modified_at":"2026-11-03T09:17:10+00:00","first_seen_at":"2026-11-03T09:19:50+00:00","fetched_at":"2026-11-03T09:19:50+00:00","note":null}],"documents":[{"id":56723,"url":"https://github.com/eclipse-threadx/threadx/security/advisories/GHSA-8pgj-qvjv-j4fq","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-11-01T17:32:52+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.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"}