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-2026-530060.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all EPSS-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.

unknownUSN-8666-2: Linux kernel (Azure) vulnerabilitiesubuntu
unknownUSN-8668-1: Linux kernel (GCP) vulnerabilitiesubuntu
unknownUSN-8667-1: Linux kernel (KVM) vulnerabilitiesubuntu
unknownUSN-8662-2: Linux kernel (FIPS) vulnerabilitiesubuntu
unknownUSN-8666-1: Linux kernel 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-8662-1: Linux kernel vulnerabilitiesubuntu
unknownUSN-8645-1: Linux kernel (Oracle) vulnerabilitiesubuntu
unknownMultiple vulnerabilities in Ubuntu Linux kernel (August 14, 2026)cert-fr-avis
unknownUSN-8633-2: Linux kernel vulnerabilitiesubuntu

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.

highCVE-2026-75975: fast-uri is a URI parser for Node.js. Its custom parser for bracketed IPv6 literals does not v…nvd · 2026-08-24
highCVE-2026-74630: In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent in6_dev_get(…nvd · 2026-08-22
highCVE-2026-74598: In the Linux kernel, the following vulnerability has been resolved: ipv6: fix Route Informatio…nvd · 2026-08-22
criticalCVE-2026-74597: In the Linux kernel, the following vulnerability has been resolved: ip6_tunnel: clear skb2->cb…nvd · 2026-08-22
criticalCVE-2026-74581: In the Linux kernel, the following vulnerability has been resolved: net: ipv6: clear suppresse…nvd · 2026-08-21
unknownIssue with FreeRTOS-Plus-TCP - IPv6 Router Advertisement Memory Safety Issuesaws · 2026-08-20