CVE-2026-90293 Linux CVE debrief

Who should care

Linux kernel administrators and developers, system administrators responsible for SCSI command execution, and security teams should review and apply patches to prevent potential SCSI command execution against unregistered sessions. This vulnerability affects Linux kernel deployments, and defenders should verify kernel versions and apply patches to prevent this scenario.

Why it matters

The Linux kernel vulnerability could allow an initiator to execute a SCSI command against an se_session with a NULL se_tpg, leading to a potential oops. Defenders should verify Linux kernel versions and apply patches to prevent this scenario.

• Verify Linux kernel versions to prevent potential SCSI command execution
• Apply patches to prevent oops due to NULL se_tpg

Technical summary

The Linux kernel vulnerability was resolved by posting full-feature receive buffers after session registration, preventing potential SCSI command execution against unregistered sessions. This change ensures that SCSI commands are only executed against registered sessions, preventing potential system instability or crashes. Defenders should review and apply patches to prevent this scenario. The vulnerability affects Linux kernel deployments, and administrators should verify kernel versions and apply patches to prevent potential SCSI command execution.

Defensive priority

Verify Linux kernel versions and apply patches to prevent potential SCSI command execution against unregistered sessions.

Recommended defensive actions

• Verify Linux kernel versions and apply patches
• Review system configurations for SCSI command execution
• Monitor system logs for potential oops
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, its resolution, and affected components. However, specific version information and exploitation details are not provided. Defenders should verify Linux kernel versions and apply patches to prevent potential SCSI command execution. The vulnerability was resolved by posting full-feature receive buffers after session registration, preventing potential SCSI command execution against unregistered sessions.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.