{"id":"CVE-2026-116728","kind":"vulnerability","aliases":["CVE-2026-116728"],"related":[],"title":"libfvde: crafted FileVault 2 volume causes heap out-of-bounds read and crash","description":"libfvde through 20260923 contains a heap out-of-bounds read vulnerability in libfvde_encrypted_metadata_read_type_0x0024() because xml_plist_data_size is not checked against the source metadata block. Attackers can supply a crafted FileVault 2 Core Storage volume that makes libfvde_volume_open() copy past the heap block buffer, crashing the application.","summary":"libfvde, a library for reading FileVault 2 encrypted volumes, does not check a size field against the metadata block when parsing a volume. A crafted FileVault 2 Core Storage volume can make it copy past a heap buffer, which crashes the application that opens the volume.","severity":"medium","cvss":6.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["disk-tools","forensics","libfvde","package"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-26T22:16:56+00:00","first_seen_at":"2026-10-26T22:25:33+00:00","triaged_at":"2026-10-26T22:27:53+00:00","updated_at":"2026-10-26T22:27:53+00:00","category":"package","confidence":0.5,"triage":{"at":"2026-10-26T22:27:53Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"libfvde: crafted FileVault 2 volume causes heap out-of-bounds read and crash","impact":"low","summary":"libfvde, a library for reading FileVault 2 encrypted volumes, does not check a size field against the metadata block when parsing a volume. A crafted FileVault 2 Core Storage volume can make it copy past a heap buffer, which crashes the application that opens the volume.","category":"package","nicknames":[],"who_cares":["libfvde","forensics","disk-tools"],"confidence":0.5,"needs_auth":"no","worst_case":"application crashes when opening a crafted volume; code execution not stated","analyst_note":"Check the upstream libfvde repository and the NVD entry for a fixed version and whether any code execution is possible beyond the crash.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000516,"input_tokens":3339,"output_tokens":364,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116728':17A,20A '-2026':16A,19A '0x0024':91C '2':4A,33B,53B,111C '20260923':75C 'applic':68B,128C 'attack':105C 'block':45B,104C,124C 'bound':11A,82C 'buffer':64B,125C 'caus':6A 'check':38B,99C 'contain':76C 'copi':60B,120C 'core':54B,112C 'craft':2A,51B,109C 'crash':14A,66B,126C 'cve':15A,18A 'data':95C 'disk':22B 'disk-tool':21B 'encrypt':34B,87C 'field':41B 'filevault':3A,32B,52B,110C 'forens':24B 'heap':7A,63B,78C,123C 'libfvd':1A,25B,27B,73C,86C,117C 'librari':29B 'make':58B,116C 'metadata':44B,88C,103C 'open':70B,119C 'out-of-bound':8A,79C 'packag':26B 'pars':47B 'past':61B,121C 'plist':94C 'read':12A,31B,83C,89C 'size':40B,96C 'sourc':102C 'storag':55B,113C 'suppli':107C 'tool':23B 'type':90C 'volum':5A,35B,49B,56B,72B,114C,118C 'vulner':84C 'xml':93C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T22:16:56+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-2026-116728","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116728","severity":null,"published_at":"2026-10-26T22:16:56+00:00","modified_at":"2026-10-26T22:16:56+00:00","first_seen_at":"2026-10-26T22:25:33+00:00","fetched_at":"2026-10-26T22:25:33+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}