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CVE-2025-58057

Netty vulnerability

7.5 HIGHPublic exploitEPSS 0.60%
  1. Published4 Sept 2025

Description

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In netty-codec-compression versions 4.1.124.Final and below, and netty-codec versions 4.2.4.Final and below, when supplied with specially crafted input, BrotliDecoder and certain other decompression decoders will allocate a large number of reachable byte buffers, which can lead to denial of service. BrotliDecoder.decompress has no limit in how often it calls pull, decompressing data 64K bytes at a time. The buffers are saved in the output list, and remain reachable until OOM is hit. This is fixed in versions 4.1.125.Final of netty-codec and 4.2.5.Final of netty-codec-compression.

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

Netty≥ 4.2.0 < 4.2.5 · < 4.1.125

Remediation

Fixed in
Netty≥ 4.2.5

References

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Frequently asked

Is CVE-2025-58057 being actively exploited?

CVE-2025-58057 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.60%.

How severe is CVE-2025-58057?

CVE-2025-58057 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.60% probability of exploitation.

Which products are affected by CVE-2025-58057?

Affected products include Netty.

How do I fix CVE-2025-58057?

Upgrade affected software to a fixed version, for example Netty 4.2.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.