CVE-2026-53304: scsi: sg: Resolve soft lockup issue when opening /dev/sgX

mediumCVSS 5.5CVE-2026-53304

CSIRTS triage

Other

What: Soft lockup issue when opening /dev/sgX.
Who is affected: Users of the affected SCSI subsystem are affected.
Urgency: Remediation is medium due to the potential for system instability.
Action: Apply the recommended patches or updates.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53304

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-533040.10% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53304	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownMultiple vulnerabilities in Microsoft Azure Linux (July 10, 2026)cert-fr-avis
medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
unknownCVE-2026-53304: In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Resolve soft loc…nvd

Recent advisories for scsi

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-53304: In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Resolve soft loc…nvd · 2026-06-26
mediumCVE-2026-48914: Qemu-kvm: heap buffer overflow in virtio-blk scsi request handlingmsrc · 2026-06-09
mediumCVE-2026-53021: scsi: target: core: Fix integer overflow in UNMAP bounds checkmsrc · 2026-06-09