{"id":"CVE-2026-98553","kind":"vulnerability","aliases":["CVE-2026-98553"],"related":[],"title":"Linux kernel autofs: failed mounts leak a pipe file reference","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nautofs: fix sbi->pipe file reference leak in autofs_kill_sb()\n\nWhen autofs_fill_super() fails before clearing AUTOFS_SBI_CATATONIC (for\nexample, when find_get_pid() fails on an invalid pgrp mount option, or\nwhen an fs_context is closed before mounting), deactivate_locked_super()\ninvokes autofs_kill_sb() -> autofs_catatonic_mode(sbi).\n\nBecause AUTOFS_SBI_CATATONIC is still set in sbi->flags,\nautofs_catatonic_mode() returns early without calling fput(sbi->pipe),\npermanently leaking the pipe struct file reference.\n\nExplicitly release sbi->pipe in autofs_kill_sb() if it is still non-NULL\nafter autofs_catatonic_mode().","summary":"When an autofs mount fails during setup, the kernel does not release the pipe file it opened, so the reference is leaked. The sources describe a resource leak and do not describe code execution or privilege gain.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["autofs","kernel","linux","runtime"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-18T16:17:07+00:00","first_seen_at":"2026-10-23T21:57:15+00:00","triaged_at":"2026-10-25T05:23:28+00:00","updated_at":"2026-10-25T05:23:28+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-10-25T05:23:28Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Linux kernel autofs: failed mounts leak a pipe file reference","impact":"low","summary":"When an autofs mount fails during setup, the kernel does not release the pipe file it opened, so the reference is leaked. The sources describe a resource leak and do not describe code execution or privilege gain.","category":"runtime","nicknames":[],"who_cares":["linux","kernel","autofs"],"confidence":0.5,"needs_auth":"unknown","worst_case":"unknown","analyst_note":"Check the NVD entry and the upstream kernel stable commit for affected kernel version ranges and the fixed versions.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000506,"input_tokens":3512,"output_tokens":309,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-98553':13A,16A 'autof':3A,17B,23B,68C,76C,80C,86C,115C,118C,123C,132C,154C,165C 'call':138C 'cataton':88C,119C,125C,133C,166C 'clear':85C 'close':108C 'code':53B 'context':106C 'cve':11A,14A 'deactiv':111C 'describ':45B,52B 'earli':136C 'exampl':90C 'execut':54B 'explicit':149C 'fail':4A,25B,83C,95C 'file':9A,35B,72C,147C 'fill':81C 'find':92C 'fix':69C 'flag':131C 'follow':63C 'fput':139C 'fs':105C 'gain':57B 'get':93C 'invalid':98C 'invok':114C 'kernel':2A,18B,29B,61C 'kill':77C,116C,155C 'leak':6A,42B,48B,74C,143C 'linux':1A,19B,60C 'lock':112C 'mode':120C,134C,167C 'mount':5A,24B,100C,110C 'non':162C 'non-nul':161C 'null':163C 'open':37B 'option':101C 'perman':142C 'pgrp':99C 'pid':94C 'pipe':8A,34B,71C,141C,145C,152C 'privileg':56B 'refer':10A,40B,73C,148C 'releas':32B,150C 'resolv':67C 'resourc':47B 'return':135C 'runtim':20B 'sb':78C,117C,156C 'sbi':70C,87C,121C,124C,130C,140C,151C 'set':128C 'setup':27B 'sourc':44B 'still':127C,160C 'struct':146C 'super':82C,113C 'vulner':64C 'without':137C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-18T16:17:07+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-98553","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98553","severity":null,"published_at":"2026-10-18T16:17:07+00:00","modified_at":"2026-10-19T10:19:11+00:00","first_seen_at":"2026-10-23T21:57:15+00:00","fetched_at":"2026-10-23T22:28:56+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"}