# CVE-2019-15126: Race condition in n/a

> Attackers can exploit a race condition in Broadcom Wi-Fi client devices to bypass layer 2 encryption and disclose sensitive information over the air.

- **Severity:** Low 3.1 (`CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 5 Feb 2020
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-p2g8-8j8x-3728, MGASA-2021-0103, MGASA-2021-0104, SUSE-SU-2021:4003-1, SUSE-SU-2021:4200-1, SUSE-SU-2021:4201-1, openSUSE-SU-2021:1648-1

## What is CVE-2019-15126?

CVE-2019-15126 is a low-severity vulnerability in Apple Ipados, published on 5 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An issue was discovered on Broadcom Wi-Fi client devices. Specifically timed and handcrafted traffic can cause internal errors (related to state transitions) in a WLAN device that lead to improper layer 2 Wi-Fi encryption with a consequent possibility of information disclosure over the air for a discrete set of traffic, a different vulnerability than CVE-2019-9500, CVE-2019-9501, CVE-2019-9502, and CVE-2019-9503.

Weakness: CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)

## Which versions are affected by CVE-2019-15126?

It affects 9 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `kernel-firmware` | SUSE:Linux Enterprise Micro 5.0 | All versions | 20200107-3.23.1 |
| `kernel-firmware` | SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 20200107-3.23.1 |
| `bcm43xx-firmware` | SUSE:Linux Enterprise Server 12 SP4-LTSS | All versions | 20180314-4.6.1 |
| `bcm43xx-firmware` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 20180314-4.6.1 |
| `kernel-firmware` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 20190618-5.17.1 |
| `bcm43xx-firmware` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 20180314-4.6.1 |
| `kernel-firmware` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 20190618-5.17.1 |
| `kernel-firmware` | openSUSE:Leap 15.2 | All versions | 20200107-lp152.2.9.1 |

Products: Apple Ipados, Apple Iphone Os, Apple Mac Os X, Broadcom Bcm43012 Firmware, Broadcom Bcm43013 Firmware, Broadcom Bcm4356 Firmware, Broadcom Bcm43752 Firmware, Broadcom Bcm4375 Firmware, Broadcom Bcm4389 Firmware.

## How do I fix CVE-2019-15126?

Apply the vendor's patch.

## Is CVE-2019-15126 being exploited?

There is no known exploitation of CVE-2019-15126 in the wild and no public exploit code.

Public exploit code:

- PoC exploit for the CVE-2019-15126 kr00k vulnerability (github_poc): https://github.com/hexway/r00kie-kr00kie
- An experimental script PoC for Kr00k vulnerability (CVE-2019-15126) (github_poc): https://github.com/akabe1/kr00ker
- PoC of CVE-2019-15126 kr00k vulnerability (github_poc): https://github.com/0x13enny/kr00k
- Broadcom Wi-Fi Devices - 'KR00K Information Disclosure (exploitdb)

## Other vulnerabilities in Apple Ipados

- [CVE-2025-43300](https://insights.sbomify.com/CVE-2025-43300/): Apple iOS, iPadOS, and macOS Out-of-Bounds Write (critical 10.0, exploited in the wild)
- [CVE-2025-24201](https://insights.sbomify.com/CVE-2025-24201/): Apple Multiple Products WebKit Out-of-Bounds Write (critical 10.0, exploited in the wild)
- [CVE-2025-24085](https://insights.sbomify.com/CVE-2025-24085/): Apple Multiple Products Use-After-Free (critical 10.0, exploited in the wild)
- [CVE-2025-31200](https://insights.sbomify.com/CVE-2025-31200/): Apple Multiple Products Memory Corruption (critical 9.8, exploited in the wild)
- [CVE-2025-31201](https://insights.sbomify.com/CVE-2025-31201/): Apple Multiple Products Arbitrary Read and Write (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-15126 and fix it if it is affected.

What it is: CVE-2019-15126 is a low-severity vulnerability in Apple Ipados, published on 5 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-15126 in the wild and no public exploit code.

Affected product: Apple Ipados. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2019-15126/ (Markdown: https://insights.sbomify.com/CVE-2019-15126/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-15126
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-15126
- OSV: https://osv.dev/vulnerability/CVE-2019-15126

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-15126/
Summaries are generated and may contain mistakes; the official description above is the record.