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CVE-2026-90337

UnknownEPSS 0.21%

Last modified

CVE-2026-90337 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.21%

11.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < be61f56c4f0ed1cbf16c5f7b0dec6d6414993dd4; >= 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < e2ddbfd826836cba1b7a25ee4eb512f7d752b703; >= 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < 8c7c75bfa7b84d6999de2100ce9c09e3779249a0; >= 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < 9260a92ce90e6a95ce2ffdf1441c5216bf3f9552; >= 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < c2aec15f78b2e6ccd9b94216a901248511355982; >= 266dcff03eed0050b6af11aaf2a61ab837d7ba3f, < 1a0e4fbce5d9c1bc179a35a2fd9ed142664299e3
LinuxLinux3.17

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-90337?
Severity scoring for CVE-2026-90337 is pending analysis. The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-90337?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST