{"id":"CVE-2026-112315","kind":"vulnerability","aliases":["CVE-2026-112315"],"related":[],"title":"MIT Kerberos: crafted RPC messages leak memory and can crash kadmind","description":"The RPCSEC_GSS authentication routines in lib/rpc/authgss_prot.c in MIT Kerberos 5 (aka krb5) 1.4 and later do not free partially decoded buffers on failure, which allows remote attackers to cause a denial of service (memory leak in kadmind) via crafted RPCSEC_GSS messages.","summary":"MIT Kerberos 5 (krb5) 1.4 and later fail to free partially decoded buffers in the RPCSEC_GSS authentication code. A remote attacker sending crafted RPCSEC_GSS messages can cause a memory leak in kadmind, leading to denial of service.","severity":"medium","cvss":5.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["kadmind","kerberos","krb5","linux","package"],"not_affected_if":["kadmind-not-running","no-network-exposure"],"how_to_check":"- Check the installed krb5 version with `klist --version` or `kadmind -version` where available\n- Confirm whether `kadmind` is running on the host and reachable from the network","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":"2026-11-09T19:32:12+00:00","updated_at":"2026-11-09T19:32:12+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-09T19:32:12Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"network","title":"MIT Kerberos: crafted RPC messages leak memory and can crash kadmind","impact":"low","summary":"MIT Kerberos 5 (krb5) 1.4 and later fail to free partially decoded buffers in the RPCSEC_GSS authentication code. A remote attacker sending crafted RPCSEC_GSS messages can cause a memory leak in kadmind, leading to denial of service.","audience":"businesses","category":"package","nicknames":[],"who_cares":["kerberos","krb5","kadmind","linux"],"confidence":0.6,"fix_status":"unknown","needs_auth":"unknown","worst_case":"remote attacker exhausts kadmind memory, causing denial of service","analyst_note":"Find the affected and fixed krb5 versions and whether RPCSEC_GSS requires authentication to reach, via the MIT krb5 advisory or NVD references.","how_to_check":"- Check the installed krb5 version with `klist --version` or `kadmind -version` where available\n- Confirm whether `kadmind` is running on the host and reachable from the network\n- unknown for the exact affected version ranges, as the sources do not list them","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["kadmind-not-running","no-network-exposure"],"who_is_affected":"Systems running MIT Kerberos 5 (krb5) with the kadmind administration daemon exposed to the network are the ones to look at. The sources do not list affected version ranges or a fixed version. Hosts where kadmind is not running or not reachable from the network are unlikely to be exposed.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000759,"input_tokens":4594,"output_tokens":599,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-112315':14A,17A '-2026':13A,16A '1.4':27B,75C '5':25B,72C 'aka':73C 'allow':87C 'attack':44B,89C 'authent':40B,65C 'buffer':35B,83C 'caus':51B,91C 'code':41B 'craft':3A,46B,101C 'crash':10A 'cve':12A,15A 'decod':34B,82C 'denial':59B,93C 'fail':30B 'failur':85C 'free':32B,80C 'gss':39B,48B,64C,103C 'kadmind':11A,18B,56B,99C 'kerbero':2A,19B,24B,71C 'krb5':20B,26B,74C 'later':29B,77C 'lead':57B 'leak':6A,54B,97C 'lib/rpc/authgss_prot.c':68C 'linux':21B 'memori':7A,53B,96C 'messag':5A,49B,104C 'mit':1A,23B,70C 'packag':22B 'partial':33B,81C 'remot':43B,88C 'routin':66C 'rpc':4A 'rpcsec':38B,47B,63C,102C 'send':45B 'servic':61B,95C 'via':100C","nicknames":[],"mitigations":[],"who_affected":"Systems running MIT Kerberos 5 (krb5) with the kadmind administration daemon exposed to the network are the ones to look at. The sources do not list affected version ranges or a fixed version. Hosts where kadmind is not running or not reachable from the network are unlikely to be exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["kadmind","kerberos","krb5","linux","medium","package"],"campaign_type":null,"search_a":"'-112315':14A,17A '-2026':13A,16A 'craft':3A 'crash':10A 'cve':12A,15A 'kadmind':11A 'kerbero':2A 'leak':6A 'memori':7A 'messag':5A 'mit':1A 'rpc':4A","search_b":"'1.4':27B '5':25B 'attack':44B 'authent':40B 'buffer':35B 'caus':51B 'code':41B 'craft':46B 'decod':34B 'denial':59B 'fail':30B 'free':32B 'gss':39B,48B 'kadmind':18B,56B 'kerbero':19B,24B 'krb5':20B,26B 'later':29B 'lead':57B 'leak':54B 'linux':21B 'memori':53B 'messag':49B 'mit':23B 'packag':22B 'partial':33B 'remot':43B 'rpcsec':38B,47B 'send':45B 'servic':61B","search_c":"'1.4':75C '5':72C 'aka':73C 'allow':87C 'attack':89C 'authent':65C 'buffer':83C 'caus':91C 'craft':101C 'decod':82C 'denial':93C 'failur':85C 'free':80C 'gss':64C,103C 'kadmind':99C 'kerbero':71C 'krb5':74C 'later':77C 'leak':97C 'lib/rpc/authgss_prot.c':68C 'memori':96C 'messag':104C 'mit':70C 'partial':81C 'remot':88C 'routin':66C 'rpcsec':63C,102C 'servic':95C 'via':100C","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:N/UI:N/S:U/C:N/I:N/A:L","cvss_by":"secalert@redhat.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-112315","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112315","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"}