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CVE-2026-23110 is an availability flaw in the Linux kernel SCSI core caused by race conditions in the logic that wakes the SCSI error handler when the final in-flight commands complete or fail concurrently. The bug affects the ordering between command completion accounting and failure accounting, such that the error handler may not be awakened when the last running command completes or times out. One root cause is a memory-ordering issue in scsi_dec_host_busy(), where clearing SCMD_STATE_INFLIGHT can be reordered with reads performed by scsi_host_busy(), allowing CPUs to observe an inconsistent busy-command count. A second root cause is an ordering flaw in scsi_eh_inc_host_failed(), where busy commands were counted before host_failed was incremented, permitting a race with a final completion path in scsi_dec_host_busy(). In the failing interleaving, neither path observes the state needed to wake the error-handler task. The upstream fix adds a memory barrier on the error path and moves the scsi_host_busy() call until after host_failed is incremented.
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A Linux kernel SCSI core vulnerability involving error-handler wake-up behavior when final completions race against each other.
A Linux kernel vulnerability in the SCSI core involving a race condition around final completions and error handler wake-up.
A Linux kernel SCSI core vulnerability involving a race condition around waking the error handler when final completions race against each other.
A Linux kernel SCSI core race condition that can prevent the SCSI error handler from waking when final command completions race, leaving I/O through the SCSI host stuck because error-state handling cannot advance.
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Cross-references every affected SKU, including bundled OEM variants.
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