{"id":"CVE-2026-112316","kind":"vulnerability","aliases":["CVE-2026-112316"],"related":[],"title":"MIT Kerberos: kadmind memory leak lets authenticated users exhaust memory","description":"xdr_krb5_tl_data() in lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (aka krb5) does not free partially decoded data on failure, which allows remote authenticated users to cause a denial of service (memory leak in kadmind) via crafted RPC requests that trigger a decode failure.","summary":"A failed decode in the kadmind admin RPC code of MIT Kerberos 5 does not free partially decoded data. A remote user with valid credentials can send crafted RPC requests to leak memory in kadmind and cause a denial of service.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["kadmind","kerberos","linux","mit-kerberos","runtime"],"not_affected_if":["auth-required","no-kadmind"],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-09T19:16:40+00:00","first_seen_at":"2026-11-09T19:28:13+00:00","triaged_at":"2026-11-09T19:31:55+00:00","updated_at":"2026-11-09T19:31:55+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-11-09T19:31:55Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"MIT Kerberos: kadmind memory leak lets authenticated users exhaust memory","impact":"low","summary":"A failed decode in the kadmind admin RPC code of MIT Kerberos 5 does not free partially decoded data. A remote user with valid credentials can send crafted RPC requests to leak memory in kadmind and cause a denial of service.","audience":"businesses","category":"runtime","nicknames":[],"who_cares":["kerberos","mit-kerberos","kadmind","linux"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"kadmind leaks memory and stops serving, denying admin service","analyst_note":"Confirm affected version range and fixed release from the MIT krb5 advisory or NVD entry for CVE-2026-112316.","how_to_check":"unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["no-kadmind","auth-required"],"who_is_affected":"Only servers running the kadmind admin daemon of MIT Kerberos 5 are exposed, and only to users who already hold valid admin RPC credentials. Sites that do not run kadmind, or that run Kerberos only as a client or KDC without kadmind, can skip it. unknown for the exact affected version range.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000707,"input_tokens":4596,"output_tokens":495,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-112316':13A,16A '-2026':12A,15A '5':36B,74C 'admin':30B 'aka':75C 'allow':86C 'authent':7A,88C 'caus':60B,91C 'code':32B 'craft':51B,101C 'credenti':48B 'cve':11A,14A 'data':42B,68C,82C 'decod':26B,41B,81C,107C 'denial':62B,93C 'exhaust':9A 'fail':25B 'failur':84C,108C 'free':39B,79C 'kadmind':3A,17B,29B,58B,99C 'kerbero':2A,18B,22B,35B,73C 'krb5':66C,76C 'leak':5A,55B,97C 'let':6A 'lib/kadm5/kadm_rpc_xdr.c':70C 'linux':19B 'memori':4A,10A,56B,96C 'mit':1A,21B,34B,72C 'mit-kerbero':20B 'partial':40B,80C 'remot':44B,87C 'request':53B,103C 'rpc':31B,52B,102C 'runtim':23B 'send':50B 'servic':64B,95C 'tl':67C 'trigger':105C 'user':8A,45B,89C 'valid':47B 'via':100C 'xdr':65C","nicknames":[],"mitigations":[],"who_affected":"Only servers running the kadmind admin daemon of MIT Kerberos 5 are exposed, and only to users who already hold valid admin RPC credentials. Sites that do not run kadmind, or that run Kerberos only as a client or KDC without kadmind, can skip it. unknown for the exact affected version range.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["kadmind","kerberos","linux","medium","mitkerberos","runtime"],"campaign_type":null,"search_a":"'-112316':13A,16A '-2026':12A,15A 'authent':7A 'cve':11A,14A 'exhaust':9A 'kadmind':3A 'kerbero':2A 'leak':5A 'let':6A 'memori':4A,10A 'mit':1A 'user':8A","search_b":"'5':36B 'admin':30B 'caus':60B 'code':32B 'craft':51B 'credenti':48B 'data':42B 'decod':26B,41B 'denial':62B 'fail':25B 'free':39B 'kadmind':17B,29B,58B 'kerbero':18B,22B,35B 'leak':55B 'linux':19B 'memori':56B 'mit':21B,34B 'mit-kerbero':20B 'partial':40B 'remot':44B 'request':53B 'rpc':31B,52B 'runtim':23B 'send':50B 'servic':64B 'user':45B 'valid':47B","search_c":"'5':74C 'aka':75C 'allow':86C 'authent':88C 'caus':91C 'craft':101C 'data':68C,82C 'decod':81C,107C 'denial':93C 'failur':84C,108C 'free':79C 'kadmind':99C 'kerbero':73C 'krb5':66C,76C 'leak':97C 'lib/kadm5/kadm_rpc_xdr.c':70C 'memori':96C 'mit':72C 'partial':80C 'remot':87C 'request':103C 'rpc':102C 'servic':95C 'tl':67C 'trigger':105C 'user':89C 'via':100C 'xdr':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-09T19:16:40+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvss_by":"secalert@redhat.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-112316","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112316","severity":null,"published_at":"2026-11-09T19:16:40+00:00","modified_at":"2026-11-09T19:16:40+00:00","first_seen_at":"2026-11-09T19:28:13+00:00","fetched_at":"2026-11-09T19:28:13+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"}