CVE-2026-53006: ipv6: fix possible UAF in icmpv6_rcv()

highCVSS 7CVE-2026-53006

CSIRTS triage

Memory corruption

What: This vulnerability is a possible use after free in icmpv6_rcv().
Who is affected: Users of affected systems utilizing IPv6.
Urgency: Remediation is urgent due to high severity and potential for exploitation.
Action: Apply the relevant patches as soon as they are available.

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-2026-53006

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-2026-530060.38% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53006	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

Recent advisories for ipv6

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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unknownCVE-2026-53362: In the Linux kernel, the following vulnerability has been resolved: ipv6: account for fraggap …nvd · 2026-07-04