{"id":"CVE-2026-124743","kind":"vulnerability","aliases":["CVE-2026-124743"],"related":[],"title":"BusyBox: crafted HFS+ filesystem image can crash volume identification","description":"A flaw was found in BusyBox. When processing filesystem metadata, the volume identification component does not properly validate header values in HFS+ filesystems. An attacker able to attach a storage device or supply a specially crafted filesystem image can trigger an application crash, resulting in a Denial of Service (DoS) and preventing device resolution.","summary":"BusyBox's volume identification code does not validate header values in HFS+ filesystems, so a crafted image or attached storage device can crash the process. The result is a denial of service that stops device resolution.","severity":"medium","cvss":5.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["busybox","embedded","infrastructure","linux"],"not_affected_if":["no-hfs-media","no-untrusted-storage"],"how_to_check":"- `busybox --help` to confirm BusyBox is present and read the version line\n- Check whether any BusyBox build on the system includes HFS+ support (`busybox blkid` or `busybox mount` used on untrusted media)","fix":null,"status":"open","published_at":"2026-11-11T12:19:48+00:00","first_seen_at":"2026-11-11T12:27:11+00:00","triaged_at":"2026-11-11T12:28:40+00:00","updated_at":"2026-11-11T12:28:40+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-11T12:28:40Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"BusyBox: crafted HFS+ filesystem image can crash volume identification","impact":"low","summary":"BusyBox's volume identification code does not validate header values in HFS+ filesystems, so a crafted image or attached storage device can crash the process. The result is a denial of service that stops device resolution.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["busybox","embedded","linux"],"confidence":0.6,"fix_status":"unknown","needs_auth":"no","worst_case":"Denial of service crashes the process and blocks device resolution","analyst_note":"Confirm affected BusyBox versions and whether a fixed release exists; the NVD entry is the only source.","how_to_check":"- `busybox --help` to confirm BusyBox is present and read the version line\n- Check whether any BusyBox build on the system includes HFS+ support (`busybox blkid` or `busybox mount` used on untrusted media)\n- unknown for the exact vulnerable version range","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-untrusted-storage","no-hfs-media"],"who_is_affected":"Systems that run BusyBox and automatically identify or mount removable or untrusted storage, such as embedded devices, appliances, or recovery environments. Systems that never parse foreign HFS+ media can skip it. The sources do not state affected version ranges.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.00072,"input_tokens":4537,"output_tokens":533,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-124743':12A,15A '-2026':11A,14A 'abl':81C 'applic':97C 'attach':38B,83C 'attack':80C 'busybox':1A,16B,20B,61C 'code':24B 'compon':69C 'craft':2A,35B,91C 'crash':7A,42B,98C 'cve':10A,13A 'denial':49B,102C 'devic':40B,54B,86C,108C 'dos':105C 'embed':17B 'filesystem':4A,32B,64C,78C,92C 'flaw':57C 'found':59C 'header':28B,74C 'hfs':3A,31B,77C 'identif':9A,23B,68C 'imag':5A,36B,93C 'infrastructur':18B 'linux':19B 'metadata':65C 'prevent':107C 'process':44B,63C 'proper':72C 'resolut':55B,109C 'result':46B,99C 'servic':51B,104C 'special':90C 'stop':53B 'storag':39B,85C 'suppli':88C 'trigger':95C 'valid':27B,73C 'valu':29B,75C 'volum':8A,22B,67C","nicknames":[],"mitigations":[],"who_affected":"Systems that run BusyBox and automatically identify or mount removable or untrusted storage, such as embedded devices, appliances, or recovery environments. Systems that never parse foreign HFS+ media can skip it. The sources do not state affected version ranges.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["busybox","embedded","infrastructure","linux","medium"],"campaign_type":null,"search_a":"'-124743':12A,15A '-2026':11A,14A 'busybox':1A 'craft':2A 'crash':7A 'cve':10A,13A 'filesystem':4A 'hfs':3A 'identif':9A 'imag':5A 'volum':8A","search_b":"'attach':38B 'busybox':16B,20B 'code':24B 'craft':35B 'crash':42B 'denial':49B 'devic':40B,54B 'embed':17B 'filesystem':32B 'header':28B 'hfs':31B 'identif':23B 'imag':36B 'infrastructur':18B 'linux':19B 'process':44B 'resolut':55B 'result':46B 'servic':51B 'stop':53B 'storag':39B 'valid':27B 'valu':29B 'volum':22B","search_c":"'abl':81C 'applic':97C 'attach':83C 'attack':80C 'busybox':61C 'compon':69C 'craft':91C 'crash':98C 'denial':102C 'devic':86C,108C 'dos':105C 'filesystem':64C,78C,92C 'flaw':57C 'found':59C 'header':74C 'hfs':77C 'identif':68C 'imag':93C 'metadata':65C 'prevent':107C 'process':63C 'proper':72C 'resolut':109C 'result':99C 'servic':104C 'special':90C 'storag':85C 'suppli':88C 'trigger':95C 'valid':73C 'valu':75C 'volum':67C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T12:19:48+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvss_by":"secalert@redhat.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124743","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124743","severity":null,"published_at":"2026-11-11T12:19:48+00:00","modified_at":"2026-11-11T12:19:48+00:00","first_seen_at":"2026-11-11T12:27:11+00:00","fetched_at":"2026-11-11T12:27:11+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}