CVE-2021-43975

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with an admin-level account. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.6% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2021-11-17 17:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-08 22:17 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.6% in the next 30 days (EPSS).
• Severity: 6.7 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2021-11-17 17:15 UTC

Last modified

2026-10-08 22:17 UTC

Exploit probability

0.6% · EPSS, next 30 days

Weakness

CWE-787 · Out-of-bounds write

Record status

Modified

Affected

• Linux Kernel ≤ 5.15.2
• Fedoraproject Fedora 34
• Fedoraproject Fedora 35
• Debian Linux 9.0
• Debian Linux 10.0
• Netapp Cloud Backup
• Netapp h500s Firmware
• Netapp h700s Firmware

Attack profile CVSS 3.1 · 6.7

Attack vector

Local

Complexity

Low

Privileges needed

High

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-43975.md and follow it. Check whether this project is affected by CVE-2021-43975. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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