CVE-2026-74675
Published: August 27, 2026Last modified: August 27, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Vulnerable (6.1.182-r0) |
| 25 LTS | linux-lts | Vulnerable (6.12.103-r0) | |
| Stream | linux-lts | Fixed (6.18.46-r0) |
References
- https://git.kernel.org/stable/c/38400673c9bfb39cfc87539e1a072087e98f4e4f
- https://git.kernel.org/stable/c/38a0aa593ebc275aea6f79534d07f44e43768ce6
- https://git.kernel.org/stable/c/3f6b1d3fcfc26dc3fc85262f753439df93b055b4
- https://git.kernel.org/stable/c/b664592e9ba8c47c9e23408db7ba52eb9f946c8a
- https://git.kernel.org/stable/c/b84fd400f80adf4d1c88fbce50ae1cf2f8119e65
- https://git.kernel.org/stable/c/cab5a342f0589334046741006d8a280514f94235
- https://git.kernel.org/stable/c/cc4a1a2ce0c58eafd477effb055863935260ddc1
- https://git.kernel.org/stable/c/e25d47a526939ad44b75f778b8a7500562b84fc1