CVE-2026-74662: inet: frags: publish queues before arming timer

mediumCVSS 5.2CVE-2026-74662

CSIRTS triage

vendor: Linux product: Linux kernel Denial of service

What: A race condition in inet fragment queue handling where the timer is armed before queues are fully published, causing potential reassembly failures.
Who is affected: Systems running affected Linux kernel versions with IPv4 fragmentation processing.
Urgency: Medium priority; not exploited but can cause denial of service through incomplete fragment reassembly.
Action: Apply Linux kernel patch that publishes queues before arming the reassembly timer.

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: medium — CVSS 5.2
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74662

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-2026-746620.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74662	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

criticalCVE-2026-74662: In the Linux kernel, the following vulnerability has been resolved: inet: frags: publish queue…nvd

Recent advisories for inet

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.

criticalCVE-2026-74662: In the Linux kernel, the following vulnerability has been resolved: inet: frags: publish queue…nvd · 2026-08-22
highCVE-2026-74550: In the Linux kernel, the following vulnerability has been resolved: net: do not send ICMP/NDIS…nvd · 2026-08-15
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unknownCVE-2026-64569: In the Linux kernel, the following vulnerability has been resolved: mpls: fix NULL deref in mp…nvd · 2026-08-05