{"id":"CVE-2026-64500","summary":"iio: adc: lpc32xx: Initialize completion before requesting IRQ","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: lpc32xx: Initialize completion before requesting IRQ\n\nIn the report from Jaeyoung Chung:\n\n\"lpc32xx_adc_probe() in drivers/iio/adc/lpc32xx_adc.c registers its\ninterrupt handler with devm_request_irq() before it initializes\nst-\u003ecompletion with init_completion(). If an interrupt arrives after\ndevm_request_irq() and before init_completion(), the handler calls\ncomplete() on an uninitialized completion, causing a kernel panic.\n\nThe probe path, in lpc32xx_adc_probe():\n\n    iodev = devm_iio_device_alloc(&pdev-\u003edev, sizeof(*st)); /* st kzalloc-zeroed */\n    ...\n    retval = devm_request_irq(&pdev-\u003edev, irq, lpc32xx_adc_isr, 0,\n                              LPC32XXAD_NAME, st);           /* register handler */\n    ...\n    init_completion(&st-\u003ecompletion);                       /* initialize completion */\n\nlpc32xx_adc_isr() calls complete():\n\n    complete(&st-\u003ecompletion);\n\nIf the device raises an interrupt before init_completion() runs,\ncomplete() acquires the uninitialized wait.lock and walks the zeroed\ntask_list in swake_up_locked(). The zeroed task_list makes list_empty()\nreturn false, so swake_up_locked() dereferences a NULL list entry,\ntriggering a KASAN wild-memory-access.\"\n\nFix the chance of a spurious IRQ causing an uninitialized pointer\ndereference by moving init_completion() above devm_request_irq().","modified":"2026-07-27T04:03:22.711336859Z","published":"2026-07-25T08:51:56.053Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64500.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0e33587967b356519aa6f220b5b43c6976320397"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1ddf7b6ffb8ebb22b92a184a9eaa76277ef0c7cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2f18c5551aa97ca7f39dbb151c67c9053ccadc17"},{"type":"WEB","url":"https://git.kernel.org/stable/c/48eccc6caed4e62c0f199ab3a3772fa969cd3b2d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7090c0d29708ee305022d0ea7b37612b33242fa2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/820c4f15353efe9a9429ae86ccceeaf4e0e4e585"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e2e8b8cdfd37ae7c7a8a5c96c59e98a768731c4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e561b35633f450ee607e87a6401d97f156a0cd54"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64500.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64500"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7901b2a1453e48c9defff2c97c67d3089bf4df7a"},{"fixed":"7090c0d29708ee305022d0ea7b37612b33242fa2"},{"fixed":"0e33587967b356519aa6f220b5b43c6976320397"},{"fixed":"1ddf7b6ffb8ebb22b92a184a9eaa76277ef0c7cd"},{"fixed":"820c4f15353efe9a9429ae86ccceeaf4e0e4e585"},{"fixed":"48eccc6caed4e62c0f199ab3a3772fa969cd3b2d"},{"fixed":"9e2e8b8cdfd37ae7c7a8a5c96c59e98a768731c4"},{"fixed":"2f18c5551aa97ca7f39dbb151c67c9053ccadc17"},{"fixed":"e561b35633f450ee607e87a6401d97f156a0cd54"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64500.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.96"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64500.json"}}],"schema_version":"1.7.5"}