CVE-2026-53236: tcp: restrict SO_ATTACH_FILTER to priv users

highCVSS 7CVE-2026-53236

CSIRTS triage

Privilege escalation

What: The tcp subsystem restricts SO_ATTACH_FILTER to privileged users only.
Who is affected: Users of the tcp subsystem.
Urgency: Remediation is high urgency due to the potential for privilege escalation, with a CVSS score of 7.
Action: Apply patches or updates that address CVE-2026-53236.

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
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53236

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-2026-532360.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53236	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 (June 29, 2026)cert-fr-avis

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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.

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