{"id":"CVE-2026-28746","kind":"vulnerability","aliases":["CVE-2026-28746"],"related":[],"title":"Intel Slim Bootloader: out-of-bounds read lets a local privileged user crash the system","description":"Out-of-bounds read in the AuthenticateComponent for the Intel(R) Slim Bootloader within Ring 0: Bare Metal OS may allow a denial of service. System software adversary with a privileged user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.","summary":"Intel Slim Bootloader has an out-of-bounds read in its AuthenticateComponent code, which runs in Ring 0 on bare-metal OS setups. A privileged local user can trigger it to cause a denial of service, with no confidentiality or integrity impact stated.","severity":"medium","cvss":6.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["bare-metal","infrastructure","intel","slim-bootloader"],"not_affected_if":["no-slim-bootloader"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T18:17:36+00:00","first_seen_at":"2026-11-10T18:22:57+00:00","triaged_at":"2026-11-10T18:24:49+00:00","updated_at":"2026-11-10T18:24:49+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-10T18:24:49Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Intel Slim Bootloader: out-of-bounds read lets a local privileged user crash the system","impact":"low","summary":"Intel Slim Bootloader has an out-of-bounds read in its AuthenticateComponent code, which runs in Ring 0 on bare-metal OS setups. A privileged local user can trigger it to cause a denial of service, with no confidentiality or integrity impact stated.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["intel","slim-bootloader","bare-metal"],"confidence":0.6,"fix_status":"unknown","needs_auth":"yes","worst_case":"local privileged user crashes the system via denial of service","analyst_note":"Check Intel's security advisory for affected Slim Bootloader versions and the fixed release; the sources give only the NVD description.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-slim-bootloader"],"who_is_affected":"The sources describe a local attack by a privileged system-software adversary against Intel Slim Bootloader in a bare-metal OS setting. Systems that do not run Slim Bootloader are not affected. The sources do not say which versions are affected or which configurations are exposed.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000709,"input_tokens":4669,"output_tokens":485,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':18A,21A '-28746':19A,22A '0':49B,92C 'access':127C 'adversari':104C 'allow':97C 'attack':114C,129C 'authenticatecompon':43B,83C 'avail':154C,169C 'bare':24B,52B,93C 'bare-met':23B,51B 'bootload':3A,30B,33B,89C 'bound':7A,39B,79C 'caus':64B 'code':44B 'combin':109C 'complex':113C 'confidenti':71B,149C,164C 'crash':14A 'cve':17A,20A 'denial':66B,99C,117C 'enabl':116C 'high':155C 'impact':74B,147C,171C 'infrastructur':26B 'integr':73B,151C,166C 'intel':1A,27B,31B,86C 'interact':142C 'intern':136C 'knowledg':137C 'let':9A 'local':11A,58B,126C 'low':112C 'may':96C,115C,122C,146C 'metal':25B,53B,94C 'none':150C,152C,165C,167C,170C 'occur':124C 'os':54B,95C 'out-of-bound':4A,36B,76C 'potenti':123C,144C 'present':133C 'privileg':12A,57B,107C 'r':87C 'read':8A,40B,80C 'requir':130C,139C 'result':121C,160C 'ring':48B,91C 'run':46B 'servic':68B,101C,119C 'setup':55B 'slim':2A,29B,32B,88C 'slim-bootload':28B 'softwar':103C 'special':135C 'state':75B 'subsequ':162C 'system':16A,102C,159C,163C 'trigger':61B 'user':13A,59B,108C,141C 'via':125C 'vulner':145C,158C 'within':90C 'without':134C","nicknames":[],"mitigations":[],"who_affected":"The sources describe a local attack by a privileged system-software adversary against Intel Slim Bootloader in a bare-metal OS setting. Systems that do not run Slim Bootloader are not affected. The sources do not say which versions are affected or which configurations are exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["baremetal","infrastructure","intel","medium","slimbootloader"],"campaign_type":null,"search_a":"'-2026':18A,21A '-28746':19A,22A 'bootload':3A 'bound':7A 'crash':14A 'cve':17A,20A 'intel':1A 'let':9A 'local':11A 'out-of-bound':4A 'privileg':12A 'read':8A 'slim':2A 'system':16A 'user':13A","search_b":"'0':49B 'authenticatecompon':43B 'bare':24B,52B 'bare-met':23B,51B 'bootload':30B,33B 'bound':39B 'caus':64B 'code':44B 'confidenti':71B 'denial':66B 'impact':74B 'infrastructur':26B 'integr':73B 'intel':27B,31B 'local':58B 'metal':25B,53B 'os':54B 'out-of-bound':36B 'privileg':57B 'read':40B 'ring':48B 'run':46B 'servic':68B 'setup':55B 'slim':29B,32B 'slim-bootload':28B 'state':75B 'trigger':61B 'user':59B","search_c":"'0':92C 'access':127C 'adversari':104C 'allow':97C 'attack':114C,129C 'authenticatecompon':83C 'avail':154C,169C 'bare':93C 'bootload':89C 'bound':79C 'combin':109C 'complex':113C 'confidenti':149C,164C 'denial':99C,117C 'enabl':116C 'high':155C 'impact':147C,171C 'integr':151C,166C 'intel':86C 'interact':142C 'intern':136C 'knowledg':137C 'local':126C 'low':112C 'may':96C,115C,122C,146C 'metal':94C 'none':150C,152C,165C,167C,170C 'occur':124C 'os':95C 'out-of-bound':76C 'potenti':123C,144C 'present':133C 'privileg':107C 'r':87C 'read':80C 'requir':130C,139C 'result':121C,160C 'ring':91C 'servic':101C,119C 'slim':88C 'softwar':103C 'special':135C 'subsequ':162C 'system':102C,159C,163C 'user':108C,141C 'via':125C 'vulner':145C,158C 'within':90C 'without':134C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T18:17:36+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/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":"secure@intel.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-28746","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28746","severity":null,"published_at":"2026-11-10T18:17:36+00:00","modified_at":"2026-11-10T18:17:36+00:00","first_seen_at":"2026-11-10T18:22:57+00:00","fetched_at":"2026-11-10T18:22:57+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"}