CVE-2026-90411

Description

In the Linux kernel, the following vulnerability has been resolved: nvme-fc: unmap cmd_iu DMA on rsp_iu mapping failure in init_request __nvme_fc_init_request() maps cmd_iu and then rsp_iu for DMA. If the rsp_iu mapping fails, the original code only recorded the error and fell through: it left the already-mapped cmd_iu unmapped and still marked the op as FCPOP_STATE_IDLE before returning. Since blk-mq does not call .exit_request() when .init_request() fails, the cmd_iu mapping is leaked for every op whose rsp_iu mapping fails. Jump to an error path on rsp_iu mapping failure that unmaps cmd_iu and returns the error without marking the op idle, so it stays in the FCPOP_STATE_UNINIT state set by the initial memset().

References

• https://git.kernel.org/stable/c/18c5781ed8bc2f423c26ec93e47e2057cd76a783
• https://git.kernel.org/stable/c/5e820d04c241c81a47e1940349018690e93d8167
• https://git.kernel.org/stable/c/acc173608ca7abe5dee8983086b44efd8b0dbc84
• https://git.kernel.org/stable/c/bb0251991420c25e3ceeac40ea09250d79ed7ef0
• https://git.kernel.org/stable/c/bd764baf82bb46e958a0bd0b481630dd71313055