CVE-2025-2837: Silicon Labs Gecko OS HTTP Request Handling Stack-based Buffer Overflow Remote Code Execution Vulnerability

This month

HIGH 8.8MITIGATE

CVE-2025-2837 is a high-severity flaw (CVSS 8.8) affecting gecko os. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Silicon Labs Gecko OS HTTP Request Handling Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Silicon Labs Gecko OS. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HTTP requests. The issue results from the lack of proper validation of the length of user-supplied

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-121
Published	2025-03-26
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: silabs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-26 22:15 UTCPublished CVE record published
2026-06-17 09:07 UTCUpdated Record last modified

silabs gecko os MITIGATE

Affected: 1.0.46

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.46

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-2837?

gecko os: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-2837 being exploited?

CVE-2025-2837 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-2837 affect?

CVE-2025-2837 affects gecko os. Severity is high (CVSS 8.8). Silicon Labs Gecko OS HTTP Request Handling Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Silicon Labs Gecko OS.

How urgent is CVE-2025-2837?

Priority 41/100. High severity

Related CVEs

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CVE-2024-24731 HIGH 7.5 MITIGATE This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Si
CVE-2024-23973 HIGH 8.8 MITIGATE This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Si
CVE-2024-23938 HIGH 8.8 MITIGATE Silicon Labs Gecko OS Debug Interface Stack-based Buffer Overflow Remote Code Execution Vulnerability
CVE-2024-23937 MEDIUM 4.3 MITIGATE This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installatio

References

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