CVE-2024-40999: net: ena: Add validation for completion descriptors consistency

mediumCVSS 5.5CVE-2024-40999

CSIRTS triage

vendor: Amazon product: ENA (Elastic Network Adapter) driver Denial of service

What: Missing validation of completion descriptors in the ENA network driver can cause denial of service.
Who is affected: Systems using Amazon ENA network adapters in EC2 or on-premises deployments.
Urgency: Medium severity; not exploited but denial of service impact is moderate.
Action: Update to patched ENA driver version or apply kernel security patch.

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 5.5
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-40999

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-2024-409990.53% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2024-40999	coverage & exploitation status	NVD · CVE.org

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