Vulnetix
Try Vulnetix Request Demo
CVE-2022-50558 PUBLISHED

Reported by Linux · Published October 22, 2025

In the Linux kernel, the following vulnerability has been resolved: regmap-irq: Use the new num_config_regs property in regmap_add_irq_chip_fwnode Commit faa87ce9196d ("regmap-irq: Introduce config registers for irq types") added the num_config_regs, then commit 9edd4f5aee84 ("regmap-irq: Deprecate type registers and virtual registers") suggested to replace num_type_reg with it. However, regmap_add_irq_chip_fwnode wasn't modified to use the new property. Later on, commit 255a03bb1bb3 ("ASoC: wcd9335: Convert irq chip to config regs") removed the old num_type_reg property from the WCD9335 driver's struct regmap_irq_chip, causing a null pointer dereference in regmap_irq_set_type when it tried to index d->type_buf as it was never allocated in regmap_add_irq_chip_fwnode: [ 39.199374] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 39.200006] Call trace: [ 39.200014] regmap_irq_set_type+0x84/0x1c0 [ 39.200026] __irq_set_trigger+0x60/0x1c0 [ 39.200040] __setup_irq+0x2f4/0x78c [ 39.200051] request_threaded_irq+0xe8/0x1a0 Use num_config_regs in regmap_add_irq_chip_fwnode instead of num_type_reg, and fall back to it if num_config_regs isn't defined to maintain backward compatibility.

EPSS 0.02% · 5.3th percentile

Risk Scores

EPSS Score
0.02%
5.3th percentile

Affected Products

VendorProductVersions
LinuxLinuxfaa87ce9196dbb074d75bd4aecb8bacf18f19b4e, faa87ce9196dbb074d75bd4aecb8bacf18f19b4e, faa87ce9196dbb074d75bd4aecb8bacf18f19b4e
LinuxLinux6.0, 0, 6.0.16
LinuxLinuxfaa87ce9196dbb074d75bd4aecb8bacf18f19b4e, faa87ce9196dbb074d75bd4aecb8bacf18f19b4e, faa87ce9196dbb074d75bd4aecb8bacf18f19b4e
linuxlinux_kernel6.0, 6.0, 6.0

Timeline

References

Open in Interactive Console →