CVE-2026-74676: vt: add permission check for KDSKBMETA ioctl

lowCVSS 3.3CVE-2026-74676

CSIRTS triage

vendor: Linux product: Linux kernel Privilege escalation

What: Missing permission check on KDSKBMETA ioctl allows unprivileged users to modify keyboard metadata.
Who is affected: Systems with virtual terminal driver where unprivileged local users can access /dev/tty or equivalent devices.
Urgency: Low severity (CVSS 3.3) with no current exploitation; requires local access.
Action: Apply Linux kernel patch adding permission validation to KDSKBMETA ioctl handler.

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: low — CVSS 3.3
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74676

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-2026-746760.18% 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-2026-74676	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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