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

highCVSS 7.1CVE-2026-53343

CSIRTS triage

Other

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: 2026-07-02
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 scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53343	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

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