{"id":"CVE-2026-98820","published":"2026-10-18T16:17:36.240","lastModified":"2026-10-19T10:19:46.087","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: set RQF_USE_SCHED when the operation is known\n\nThe cached requests are allocated for one operation but can be handed\nout for another. A passthrough command has RQF_USE_SCHED cleared, so\nusing those flags for a subsequent read/write bio will insert it into\nthe scheduler without ->prepare_request() and frees it without\n->finish_request(). For kyber, this leaks the domain token acquired at\ndispatch and stalls the queue.\n\nDon't set RQF_USE_SCHED based on the first operation the batch happened\nto be allocated for. Instead, set it after the request is claimed by an\noperation. Introduce a helper function, blk_mq_rq_late_init() for this,\nand absorb blk_mq_rq_time_init() since the two run together.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/2c47ebc27fa72078e26177cd458cdaf3006a9685","tags":[]},{"url":"https://git.kernel.org/stable/c/790730e4d95de8356a573d4b4864486bba731863","tags":[]},{"url":"https://git.kernel.org/stable/c/ab6c756f28c741d704a7c3e04814bfc3adf6f818","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}