{"id":"CVE-2026-123976","kind":"vulnerability","aliases":["CVE-2026-123976"],"related":[],"title":"EDFbrowser: crafted EDF+ or BDF+ file overflows memory when opened","description":"EDFbrowser before 2.16 contains an out-of-bounds write vulnerability in check_edf_file() that allows attackers to overflow the 256-element annot_ch array by supplying excessive annotation signals. Attackers can craft an EDF+ or BDF+ file with more than 256 annotation signals to overwrite edfhdrblock members, including the signal parameter pointer, crashing the application when opened.","summary":"EDFbrowser before 2.16 has an out-of-bounds write in check_edf_file() caused by a fixed 256-element annotation array. A crafted EDF+ or BDF+ file with more than 256 annotation signals overwrites header structure members, crashing the application when the file is opened.","severity":"medium","cvss":6.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["edfbrowser","medical-signal-analysis","package"],"not_affected_if":["no-untrusted-edf-files","version-2.16-or-later"],"how_to_check":"- Check the installed EDFbrowser version and compare it with `2.16`.\n- Confirm whether the application is used to open EDF or BDF files from untrusted sources.","fix":"- EDFbrowser: move to `2.16` or later (the sources state the fix is in versions before 2.16 being affected).","status":"open","published_at":"2026-11-06T18:18:05+00:00","first_seen_at":"2026-11-06T18:44:09+00:00","triaged_at":"2026-11-06T18:45:18+00:00","updated_at":"2026-11-06T18:45:18+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-06T18:45:18Z","model":"claude-haiku-5-5","output":{"fix":"- EDFbrowser: move to `2.16` or later (the sources state the fix is in versions before 2.16 being affected).","reach":"local","title":"EDFbrowser: crafted EDF+ or BDF+ file overflows memory when opened","impact":"low","summary":"EDFbrowser before 2.16 has an out-of-bounds write in check_edf_file() caused by a fixed 256-element annotation array. A crafted EDF+ or BDF+ file with more than 256 annotation signals overwrites header structure members, crashing the application when the file is opened.","audience":"developers","category":"package","nicknames":[],"who_cares":["edfbrowser","medical-signal-analysis"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Application crashes when a crafted file is opened; memory corruption may be possible.","analyst_note":"","how_to_check":"- Check the installed EDFbrowser version and compare it with `2.16`.\n- Confirm whether the application is used to open EDF or BDF files from untrusted sources.","plain_action":"","needs_analyst":false,"not_affected_if":["version-2.16-or-later","no-untrusted-edf-files"],"who_is_affected":"Anyone running EDFbrowser older than 2.16 who opens EDF+ or BDF+ files, especially files from untrusted sources. The sources describe a crash on opening; they do not describe code execution, so the exposure is mainly to researchers and clinicians who open third-party recordings.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.000708,"input_tokens":4290,"output_tokens":558,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-123976':13A,16A '-2026':12A,15A '2.16':25B,71C '256':41B,54B,90C,111C 'allow':85C 'analysi':21B 'annot':43B,55B,92C,98C,112C 'applic':63B,125C 'array':44B,94C 'attack':86C,100C 'bdf':5A,49B,106C 'bound':31B,77C 'caus':37B 'ch':93C 'check':34B,81C 'contain':72C 'craft':2A,46B,102C 'crash':61B,123C 'cve':11A,14A 'edf':3A,35B,47B,82C,104C 'edfbrows':1A,17B,23B,69C 'edfhdrblock':116C 'element':42B,91C 'excess':97C 'file':6A,36B,50B,66B,83C,107C 'fix':40B 'header':58B 'includ':118C 'medic':19B 'medical-signal-analysi':18B 'member':60B,117C 'memori':8A 'open':10A,68B,127C 'out-of-bound':28B,74C 'overflow':7A,88C 'overwrit':57B,115C 'packag':22B 'paramet':121C 'pointer':122C 'signal':20B,56B,99C,113C,120C 'structur':59B 'suppli':96C 'vulner':79C 'write':32B,78C","nicknames":[],"mitigations":[],"who_affected":"Anyone running EDFbrowser older than 2.16 who opens EDF+ or BDF+ files, especially files from untrusted sources. The sources describe a crash on opening; they do not describe code execution, so the exposure is mainly to researchers and clinicians who open third-party recordings.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["edfbrowser","medicalsignalanalysis","medium","package"],"campaign_type":null,"search_a":"'-123976':13A,16A '-2026':12A,15A 'bdf':5A 'craft':2A 'cve':11A,14A 'edf':3A 'edfbrows':1A 'file':6A 'memori':8A 'open':10A 'overflow':7A","search_b":"'2.16':25B '256':41B,54B 'analysi':21B 'annot':43B,55B 'applic':63B 'array':44B 'bdf':49B 'bound':31B 'caus':37B 'check':34B 'craft':46B 'crash':61B 'edf':35B,47B 'edfbrows':17B,23B 'element':42B 'file':36B,50B,66B 'fix':40B 'header':58B 'medic':19B 'medical-signal-analysi':18B 'member':60B 'open':68B 'out-of-bound':28B 'overwrit':57B 'packag':22B 'signal':20B,56B 'structur':59B 'write':32B","search_c":"'2.16':71C '256':90C,111C 'allow':85C 'annot':92C,98C,112C 'applic':125C 'array':94C 'attack':86C,100C 'bdf':106C 'bound':77C 'ch':93C 'check':81C 'contain':72C 'craft':102C 'crash':123C 'edf':82C,104C 'edfbrows':69C 'edfhdrblock':116C 'element':91C 'excess':97C 'file':83C,107C 'includ':118C 'member':117C 'open':127C 'out-of-bound':74C 'overflow':88C 'overwrit':115C 'paramet':121C 'pointer':122C 'signal':99C,113C,120C 'suppli':96C 'vulner':79C 'write':78C","first_public_at":"2026-11-06T18:18:05+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/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":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-123976","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123976","severity":null,"published_at":"2026-11-06T18:18:05+00:00","modified_at":"2026-11-06T18:18:05+00:00","first_seen_at":"2026-11-06T18:44:09+00:00","fetched_at":"2026-11-06T18:44:09+00:00","note":null}],"documents":[{"id":88846,"url":"https://www.vulncheck.com/advisories/edfbrowser-before-2.16-out-of-bounds-write-via-check-edf-file-annotation-signals","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"}],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}