CVE-2026-90411 nvme-fc: unmap cmd_iu DMA on rsp_iu mapping failure in init_request
A memory leak in the Linux kernel NVMe FC driver can lead to resource exhaustion and denial of service when DMA mapping fails.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90411?
CVE-2026-90411 is a memory corruption vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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().
Which versions are affected by CVE-2026-90411?
How do I fix CVE-2026-90411?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-90411 being exploited?
There is no known exploitation of CVE-2026-90411 in the wild and no public exploit code.
Sources
Also known as AZL-102372, BELL-CVE-2026-90411, DEBIAN-CVE-2026-90411, GHSA-cp4g-4cx8-r2fq, UBUNTU-CVE-2026-90411.