CVE-2026-53228: ipv6: sit: reload inner IPv6 header after GSO offloads

highCVSS 7CVE-2026-53228

CSIRTS triage

vendor: Linux product: kernelOther

What: There is a vulnerability in the IPv6 implementation that affects the handling of inner IPv6 headers after GSO offloads.
Who is affected: Deployments of the Linux kernel with IPv6 support.
Urgency: Remediation is urgent due to the high severity rating, although exploitation is not currently reported.
Action: Update to the latest kernel version that addresses this issue.

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

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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-2026-53228

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-2026-532280.56% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-53228	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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