Description
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.
References8
- git.kernel.org/stable/c/38400673c9bfb39cfc87539e1a072087e98f4e4f
- git.kernel.org/stable/c/38a0aa593ebc275aea6f79534d07f44e43768ce6
- git.kernel.org/stable/c/3f6b1d3fcfc26dc3fc85262f753439df93b055b4
- git.kernel.org/stable/c/b664592e9ba8c47c9e23408db7ba52eb9f946c8a
- git.kernel.org/stable/c/b84fd400f80adf4d1c88fbce50ae1cf2f8119e65
- git.kernel.org/stable/c/cab5a342f0589334046741006d8a280514f94235
- git.kernel.org/stable/c/cc4a1a2ce0c58eafd477effb055863935260ddc1
- git.kernel.org/stable/c/e25d47a526939ad44b75f778b8a7500562b84fc1
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 9 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.