Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: serial: core: do fallible allocations before the console can be registered serial_core_add_one_port() allocates uport->tty_groups after uart_configure_port(), which may register the console. If the allocation fails, the driver unwinds the port while its console remains registered. The earlier uport->name allocation has a related failure path that leaves state->uart_port linked to a port being freed. Failslab reproduced a NULL dereference in PL011 console output and a KASAN use-after-free in i.MX console output after failed binds. Allocate the name and tty_groups before linking the port and configuring it. Reserve space for the optional driver attribute group because config_port() may populate uport->attr_group during configuration.
References
- https://git.kernel.org/stable/c/1a0e4fbce5d9c1bc179a35a2fd9ed142664299e3
- https://git.kernel.org/stable/c/c2aec15f78b2e6ccd9b94216a901248511355982
FAQ
What is CVE-2026-90337?
CVE-2026-90337 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: serial: core: do fallible allocations before the console can be registered serial_core_add_one_port() allocates uport->tty_groups ...
How severe is CVE-2026-90337?
CVSS scoring is not yet available for CVE-2026-90337. Check NVD for updates.
Is there a patch for CVE-2026-90337?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.