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Vulnerabilities

Security fix · CVE-2025-58057

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients.

Published Sep 3, 2025 · catalog updated Oct 19, 2026 · Netty is an asynchronous

Check this week

CVE-2025-58057 is not in CISA KEV. FIRST estimates a 63.00% chance of exploitation in the next 30 days. Check whether you run Netty is an asynchronous.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Netty is an asynchronous).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
63.00%
Remediation
Version ranges on file
Affected products
cpe netty/netty · vendor netty netty ≤ 4.2.4.Final, < 4.2.5.Final

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe netty/nettyversion unspecified
  • vendor netty netty ≤ 4.2.4.Final, < 4.2.5.Final≤ 4.2.4.Final, < 4.2.5.Final

How to fix CVE-2025-58057

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-58057 is not in CISA KEV. FIRST estimates a 63.00% chance of exploitation in the next 30 days. Check whether you run Netty is an asynchronous.

Which versions are affected?

Compare what you have installed with netty netty ≤ 4.2.4.Final, < 4.2.5.Final ≤ 4.2.4.Final, < 4.2.5.Final. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-409. EPSS 63.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 4, 2025 · NIST NVD

    Detected

    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

  2. Oct 19, 2026 · NIST NVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2025-58057

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-26649

    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 s

    euvd.enisa.europa.eu
  • NIST NVDVulnerability recordCVE-2025-58057

    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 s

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 19, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.