CVE-2026-74693: net: prestera: validate firmware header length

mediumCVSS 4.4CVE-2026-74693

CSIRTS triage

vendor: Linux product: Linux kernelOther

What: The Prestera network device driver does not validate firmware header length, allowing malformed firmware to cause issues.
Who is affected: Systems using Marvell Prestera switch hardware with untrusted or corrupted firmware.
Urgency: Medium priority; not currently exploited but affects firmware upload security.
Action: Apply kernel patch validating firmware header length in Prestera driver or use only signed/verified firmware.

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 4.4
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74693

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-2026-746930.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74693	coverage & exploitation status	NVD · CVE.org

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