CVE-2026-68354: firewire: net: Fix fragmented datagram reassembly

criticalCVSS 9.8CVE-2026-68354

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: Fragmented datagram reassembly issue in FireWire networking allows memory corruption.
Who is affected: Systems with FireWire networking enabled that accept external FireWire traffic.
Urgency: Critical; CVSS 9.8 with network attack vector; memory corruption can lead to arbitrary code execution.
Action: Update to a patched kernel version immediately.

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: critical — CVSS 9.8
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68354

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-2026-683540.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68354	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-68354: In the Linux kernel, the following vulnerability has been resolved: firewire: net: Fix fragmen…nvd

Recent advisories for firewire

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.

unknownCVE-2026-74734: In the Linux kernel, the following vulnerability has been resolved: firewire: ohci: fix NULL p…nvd · 2026-08-26
mediumCVE-2026-74734: firewire: ohci: fix NULL pointer dereference in ar_context_releasemsrc · 2026-08-11
highCVE-2026-68354: In the Linux kernel, the following vulnerability has been resolved: firewire: net: Fix fragmen…nvd · 2026-08-10
highCVE-2026-64483: ALSA: firewire: isight: bound the sample count to the packet payloadmsrc · 2026-08-06
unknownCVE-2026-64483: In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire: isight: bo…nvd · 2026-07-25