CVE-2026-23110

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

scsi: core: Wake up the error handler when final completions race against each other

The fragile ordering between marking commands completed or failed so

that the error handler only wakes when the last running command

completes or times out has race conditions. These race conditions can

cause the SCSI layer to fail to wake the error handler, leaving I/O

through the SCSI host stuck as the error state cannot advance.

First, there is an memory ordering issue within scsi_dec_host_busy().

The write which clears SCMD_STATE_INFLIGHT may be reordered with reads

counting in scsi_host_busy(). While the local CPU will see its own

write, reordering can allow other CPUs in scsi_dec_host_busy() or

scsi_eh_inc_host_failed() to see a raised busy count, causing no CPU to

see a host busy equal to the host_failed count.

This race condition can be prevented with a memory barrier on the error

path to force the write to be visible befor

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References