{"id":"CVE-2026-98943","kind":"vulnerability","aliases":["CVE-2026-98943"],"related":[],"title":"Linux kernel: Steam HID driver locking bugs, unlocked RCU access","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: steam: Clean up locking\n\nThis cleans up several issues with locking behavior, including RCU accesses\nnot being guarded behind a lock.","summary":"The Linux kernel's HID Steam controller driver had several locking problems, including RCU-protected accesses that were not guarded by a lock. The sources do not state what an attacker gets from this.","severity":"unknown","cvss":null,"epss":0.00209,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","kernel","linux","steam-controller"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-23T13:17:15+00:00","first_seen_at":"2026-10-23T21:57:33+00:00","triaged_at":"2026-10-25T04:57:59+00:00","updated_at":"2026-10-25T12:38:50+00:00","category":"infrastructure","confidence":0.4,"triage":{"at":"2026-10-25T04:57:59Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Linux kernel: Steam HID driver locking bugs, unlocked RCU access","impact":"low","summary":"The Linux kernel's HID Steam controller driver had several locking problems, including RCU-protected accesses that were not guarded by a lock. The sources do not state what an attacker gets from this.","category":"infrastructure","nicknames":[],"who_cares":["linux","kernel","steam-controller"],"confidence":0.4,"needs_auth":"unknown","worst_case":"unknown","analyst_note":"Find the upstream kernel commit and NVD entry to confirm the impact, affected kernel versions and 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":"unknown"},"cost_usd":0.000487,"input_tokens":3282,"output_tokens":318,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-98943':13A,16A 'access':10A,39B,81C 'attack':54B 'behavior':78C 'behind':85C 'bug':7A 'clean':68C,72C 'control':22B,29B 'cve':11A,14A 'driver':5A,30B 'follow':61C 'get':55B 'guard':43B,84C 'hid':4A,27B,66C 'includ':35B,79C 'infrastructur':17B 'issu':75C 'kernel':2A,18B,25B,59C 'linux':1A,19B,24B,58C 'lock':6A,33B,46B,70C,77C,87C 'problem':34B 'protect':38B 'rcu':9A,37B,80C 'rcu-protect':36B 'resolv':65C 'sever':32B,74C 'sourc':48B 'state':51B 'steam':3A,21B,28B,67C 'steam-control':20B 'unlock':8A 'vulner':62C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-23T13:17:15+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-98943","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98943","severity":null,"published_at":"2026-10-23T13:17:15+00:00","modified_at":"2026-10-23T13:17:15+00:00","first_seen_at":"2026-10-23T21:57:33+00:00","fetched_at":"2026-10-23T22:29:03+00:00","note":null},{"source":"epss","external_id":"CVE-2026-98943","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98943","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-25T12:38:50+00:00","fetched_at":"2026-10-25T12:38:50+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"}