CVE-2026-53343: ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow

CSIRTS triage

What

This vulnerability involves a use byte load for KASAN VMAP stack shadow.

Who is affected

Affected systems using the ARM architecture are impacted.

Urgency

Remediation is urgent due to the high severity.

Action

Apply the relevant updates for ARM systems.

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

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

high — CVSS 7.1

Published

2026-07-14

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53343

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-2026-533430.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
• unknownCVE-2026-53343: In the Linux kernel, the following vulnerability has been resolved: ARM: 9475/1: entry: use by…nvd

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