CVE-2026-74691: net: thunderbolt: Tear down DMA paths before stopping the rings

mediumCVSS 6.5CVE-2026-74691

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: Thunderbolt network driver does not tear down DMA paths before stopping rings, causing potential data corruption or access violations.
Who is affected: Systems with Thunderbolt networking enabled, particularly during device removal or shutdown.
Urgency: Medium-high priority; CVSS 6.5 indicates elevated severity; not currently exploited.
Action: Apply kernel patch ensuring DMA paths are torn down before ring shutdown or update to patched version.

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 6.5
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74691

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-2026-746910.17% 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-2026-74691	coverage & exploitation status	NVD · CVE.org

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