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 EPSS-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.

medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
unknownUSN-8668-1: Linux kernel (GCP) vulnerabilitiesubuntu
unknownUSN-8665-1: Linux kernel (Raspberry Pi) vulnerabilitiesubuntu
unknownUSN-8664-1: Linux kernel (NVIDIA BaseOS) vulnerabilitiesubuntu
unknownUSN-8663-1: Linux kernel (NVIDIA) vulnerabilitiesubuntu
unknownUSN-8620-4: Linux kernel (Intel IoTG) vulnerabilitiesubuntu
unknownUSN-8620-3: Linux kernel (Intel IoTG) vulnerabilitiesubuntu
unknownUSN-8620-2: Linux kernel (Azure FIPS) vulnerabilitiesubuntu
highUSN-8620-1: Linux kernel vulnerabilitiesubuntu
highUSN-8619-1: Linux kernel (HWE) vulnerabilitiesubuntu
highUSN-8595-3: Linux kernel (AWS) vulnerabilitiesubuntu
highUSN-8574-3: Linux kernel vulnerabilitiesubuntu

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.

highCVE-2026-74703: In the Linux kernel, the following vulnerability has been resolved: vhost-scsi: Validate T10 P…nvd · 2026-08-22
highCVE-2026-74702: In the Linux kernel, the following vulnerability has been resolved: vhost-scsi: reject feature…nvd · 2026-08-22
highCVE-2026-19442: IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 has a pointer validation flaw exists in the AIX …nvd · 2026-08-20
highCVE-2026-74557: In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi: Fix stale-…nvd · 2026-08-15
criticalCVE-2026-74556: In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi_tcp: Bound …nvd · 2026-08-15
unknownCVE-2026-74555: In the Linux kernel, the following vulnerability has been resolved: scsi: libsas: Fix HA resum…nvd · 2026-08-15