{"apiVersion":"1.0","identifier":"CVE-2026-99050","description":"In the Linux kernel, the following vulnerability has been resolved: gpio: mpsse: fix race when arming the IRQ poll worker gpio_mpsse_irq_enable() arms the poll worker before publishing it: schedule_work() runs before the worker is added to priv->workers. If gpio_mpsse_disconnect() walks the list in that window it misses the worker, and once disconnect returns, the USB core frees mpsse_priv while the orphaned gpio_mpsse_poll() work keeps accessing it, causing a use-after-free. Fix this by publishing and arming the worker in one irq_spin critical section. Teardown walks the same list under irq_spin, so a worker found on the list is guaranteed to be armed, and cancel_work_sync() handles it whether it is queued or running. A worker armed after the disconnect walk would still be missed, so also set a new priv->dying flag under irq_spin before the teardown walk, and check it in the same critical section, freeing it via kfree_rcu() instead when the device is going away, since kfree() would be called with the IRQ core-s raw spinlock held and may sleep on PREEMPT_RT. schedule_work() is safe to call with irq_spin held, and the next probe gets a fresh mpsse_priv, so the flag never needs to be cleared. This issue was found by an in-house static analysis tool.","publishedAt":"2026-10-23T13:17:28","lastModifiedAt":"2026-10-24T14:16:53","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-99050","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00157,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-99050","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-99050","en":"https://www.redsauce.net/en/cves/CVE-2026-99050","fr":"https://www.redsauce.net/fr/cves/CVE-2026-99050","pt":"https://www.redsauce.net/pt/cves/CVE-2026-99050","de":"https://www.redsauce.net/de/cves/CVE-2026-99050","sk":"https://www.redsauce.net/sk/cves/CVE-2026-99050","el":"https://www.redsauce.net/el/cves/CVE-2026-99050"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-99050"}}