CVE-2022-49072

gpio: Restrict usage of GPIO chip irq members before initialization

Description

In the Linux kernel, the following vulnerability has been resolved: gpio: Restrict usage of GPIO chip irq members before initialization GPIO chip irq members are exposed before they could be completely initialized and this leads to race conditions. One such issue was observed for the gc->irq.domain variable which was accessed through the I2C interface in gpiochip_to_irq() before it could be initialized by gpiochip_add_irqchip(). This resulted in Kernel NULL pointer dereference. Following are the logs for reference :- kernel: Call Trace: kernel: gpiod_to_irq+0x53/0x70 kernel: acpi_dev_gpio_irq_get_by+0x113/0x1f0 kernel: i2c_acpi_get_irq+0xc0/0xd0 kernel: i2c_device_probe+0x28a/0x2a0 kernel: really_probe+0xf2/0x460 kernel: RIP: 0010:gpiochip_to_irq+0x47/0xc0 To avoid such scenarios, restrict usage of GPIO chip irq members before they are completely initialized.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/7e88a50704b0c49ad3f2d11e8b963341cf68a89f
https://git.kernel.org/stable/c/0912cf021fb5749372b3782611d8b1de4986c13a
https://git.kernel.org/stable/c/2c1fa3614795e2b24da1ba95de0b27b8f6ea4537
https://git.kernel.org/stable/c/f8dea54f74cae8c2e4d7b2952e8fed7743a85c87
https://git.kernel.org/stable/c/5467801f1fcbdc46bc7298a84dbf3ca1ff2a7320

Frequently Asked Questions

What is the severity of CVE-2022-49072?: CVE-2022-49072 has not yet been assigned a CVSS score.
How to fix CVE-2022-49072?: To fix CVE-2022-49072, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49072 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49072 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49072?: CVE-2022-49072 affects Linux Linux, Linux Linux.

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