CVE-2026-74675
In the Linux kernel, the following vulnerability has been resolved:
vt: stabilize tty reference in kbd_keycode with tty_port_tty_get
kbd_keycode() reads vc->port.tty without acquiring a tty reference,
racing against con_shutdown() which clears port.tty under a different
lock. Use tty_port_tty_get()/tty_kref_put() to hold a proper reference
for the duration the tty pointer is needed.
CSIRTS triage
- 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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Exploitation outlook
- Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
Advisory coverage (2)
External references
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