SB2026082499 - Race condition in Linux kernel tty vt driver
Published: August 24, 2026
Security Bulletin ID
SB2026082499
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Race condition (CVE-ID: CVE-2026-74675)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in kbd_keycode in drivers/tty/vt/keyboard.c when handling keyboard input while accessing vc->port.tty. A local user can trigger the race to cause a denial of service.
Remediation
Install update from vendor's website.
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