CVE-2026-74675: vt: stabilize tty reference in kbd_keycode with tty_port_tty_get

mediumCVSS 4.7CVE-2026-74675

CSIRTS triage

vendor: Linux product: Linux kernel Memory corruption

What: Race condition in keyboard handling where tty reference may be released before kbd_keycode access, causing use-after-free.
Who is affected: Systems with virtual terminal (vt) and keyboard input drivers; local users with terminal access.
Urgency: Medium severity (CVSS 4.7) with no current exploitation; local exposure.
Action: Apply Linux kernel patch to stabilize tty references in kbd_keycode using tty_port_tty_get.

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 4.7
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74675

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-2026-746750.18% 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-2026-74675	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-74675: In the Linux kernel, the following vulnerability has been resolved: vt: stabilize tty referenc…nvd

Recent advisories for vt

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.

highCVE-2026-81625: A remote attacker with user privileges may use a malicious or compromised NASL vulnerability t…nvd · 2026-08-27
unknownCVE-2026-74676: In the Linux kernel, the following vulnerability has been resolved: vt: add permission check f…nvd · 2026-08-22
highCVE-2026-74675: In the Linux kernel, the following vulnerability has been resolved: vt: stabilize tty referenc…nvd · 2026-08-22
highCVE-2026-72693: `openvt -u` is intended to identify the owner of the current VT and then execute `login` as th…nvd · 2026-08-11
lowCVE-2026-74676: vt: add permission check for KDSKBMETA ioctlmsrc · 2026-08-11