CVE-2026-90337
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.
Affected versions
Linux kernel versions
3.17
and later are affected. Fixed in
7.2.6,
7.3-rc1
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-90337?
CVE-2026-90337 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.17 onward and has been patched in 7.2.6 and 7.3-rc1. CVE-2026-90337 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-90337?
Yes. CVE-2026-90337 has been patched. Fixed versions include 7.2.6 and 7.3-rc1. If you are running Linux kernel 3.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-90337 actively exploited?
No. CVE-2026-90337 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.