{"id":"CVE-2026-98527","kind":"vulnerability","aliases":["CVE-2026-98527"],"related":[],"title":"Linux kernel Zynq GPIO driver leaks runtime PM reference on request error","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: zynq: fix runtime PM leak on request error path\n\npm_runtime_get_sync() leaves the usage counter incremented even when it\nfails, and zynq_gpio_request() returns the error without dropping it.\n\ngpiolib does not call ->free() when ->request() fails, so zynq_gpio_free(),\nwhich holds the only matching pm_runtime_put(), never runs. The reference\nis leaked and the controller can no longer runtime-suspend, so its clock\nstays enabled.\n\nSwitch to pm_runtime_resume_and_get(), which only increments the usage\ncounter on success.","summary":"The Zynq GPIO driver in the Linux kernel leaks a runtime power-management reference when a GPIO request fails, because the error path does not drop the usage counter. As a result the controller cannot runtime-suspend and its clock stays enabled.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["gpio","linux-kernel","runtime","zynq"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-10-18T16:17:04+00:00","first_seen_at":"2026-10-23T21:57:15+00:00","triaged_at":"2026-10-25T05:25:06+00:00","updated_at":"2026-10-25T05:25:06+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-25T05:25:06Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Linux kernel Zynq GPIO driver leaks runtime PM reference on request error","impact":"low","summary":"The Zynq GPIO driver in the Linux kernel leaks a runtime power-management reference when a GPIO request fails, because the error path does not drop the usage counter. As a result the controller cannot runtime-suspend and its clock stays enabled.","category":"runtime","nicknames":[],"who_cares":["linux-kernel","zynq","gpio"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Power management leak keeps the GPIO controller clock enabled","analyst_note":"","how_to_check":"unknown","needs_analyst":false,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.0005,"input_tokens":3434,"output_tokens":313,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-98527':15A,18A 'call':115C 'cannot':60B 'clock':66B,149C 'control':59B,140C 'counter':54B,96C,164C 'cve':13A,16A 'driver':5A,28B 'drop':51B,110C 'enabl':68B,151C 'error':12A,47B,87C,108C 'even':98C 'fail':44B,101C,119C 'fix':81C 'follow':74C 'free':116C,123C 'get':91C,158C 'gpio':4A,19B,27B,42B,79C,104C,122C 'gpiolib':112C 'hold':125C 'increment':97C,161C 'kernel':2A,22B,32B,72C 'leak':6A,33B,84C,137C 'leav':93C 'linux':1A,21B,31B,71C 'linux-kernel':20B 'longer':143C 'manag':38B 'match':128C 'never':132C 'path':48B,88C 'pm':8A,83C,89C,129C,154C 'power':37B 'power-manag':36B 'put':131C 'refer':9A,39B,135C 'request':11A,43B,86C,105C,118C 'resolv':78C 'result':57B 'resum':156C 'return':106C 'run':133C 'runtim':7A,23B,35B,62B,82C,90C,130C,145C,155C 'runtime-suspend':61B,144C 'stay':67B,150C 'success':166C 'suspend':63B,146C 'switch':152C 'sync':92C 'usag':53B,95C,163C 'vulner':75C 'without':109C 'zynq':3A,24B,26B,80C,103C,121C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-18T16:17:04+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-98527","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98527","severity":null,"published_at":"2026-10-18T16:17:04+00:00","modified_at":"2026-10-19T10:19:07+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"}