CVE-2022-48891: regulator: da9211: Use irq handler when ready

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-08-21 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: regulator: da9211: Use irq handler when ready If the system does not come from reset (like when it is kexec()), the regulator might have an IRQ waiting for us. If we enable the IRQ handler before its structures are ready, we crash. This patch fixes: [ 1.141839] Unable to handle kernel read from unreadable memory at virtual address 0000000000000078 [ 1.316096] Call trace: [ 1.316101] blocking_notifier_call_chain+0x20/0xa8 [ 1.322757] cpu cpu0: dummy supplies not allowed for exclusive requests [ 1.327823] regulator_notifier_call_chain+0x1c/0x2c [ 1.327825] da9211_irq_handler+0x68/0xf8 [ 1.327829] irq_thread+0x11c/0x234 [ 1.327833] kthread+0x13c/0x154

Affected products

Linux kernel: before 4.14.303; from 4.15 before 4.19.270; from 4.20 before 5.4.229; from 5.5 before 5.10.164; from 5.11 before 5.15.89; from 5.16 before 6.1.7 — fixed in 4.14.303, 4.19.270, 5.10.164, 5.15.89, 5.4.229, 6.1.7

How to fix

Upgrade to a fixed version: Linux kernel 4.14.303, 4.19.270, 5.10.164, 5.15.89. Check the vendor advisory for mitigations.

References

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