CVE-2025-24970: Netty vulnerability (CVSS 7.5)

Description

Netty, an asynchronous, event-driven network application framework, has a vulnerability starting in version 4.1.91.Final and prior to version 4.1.118.Final. When a special crafted packet is received via SslHandler it doesn't correctly handle validation of such a packet in all cases which can lead to a native crash. Version 4.1.118.Final contains a patch. As workaround its possible to either disable the usage of the native SSLEngine or change the code manually.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Netapp Active Iq Unified Managerall versions

Netapp Oncommand Insightall versions

Netty≥ 4.1.91 < 4.1.118

Remediation

Fixed in

Netty≥ 4.1.118

Patch & vendor advisories

References

https://github.com/netty/netty/commit/87f40725155b2f89adfde68c7732f97c153676c4Patch
https://github.com/netty/netty/security/advisories/GHSA-4g8c-wm8x-jfhwVendor Advisory
https://security.netapp.com/advisory/ntap-20250221-0005/Third Party Advisory
https://www.vicarius.io/vsociety/posts/cve-2025-24970-netty-vulnerability-detectionExploitThird Party Advisory
https://www.vicarius.io/vsociety/posts/cve-2025-24970-netty-vulnerability-mitigationExploitMitigationThird Party Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-24970 being actively exploited?

CVE-2025-24970 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 2.19%.

How severe is CVE-2025-24970?

CVE-2025-24970 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 2.19% probability of exploitation.

Which products are affected by CVE-2025-24970?

Affected products include Netapp Active Iq Unified Manager, Netapp Oncommand Insight, Netty.

How do I fix CVE-2025-24970?

Upgrade affected software to a fixed version, for example Netty 4.1.118 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-24970 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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