CVE-2025-62504

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Source
https://cve.org/CVERecord?id=CVE-2025-62504
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-62504.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-62504
Aliases
Downstream
Related
Published
2025-10-16T21:23:41.883Z
Modified
2026-04-10T05:33:06.541552Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Envoy Lua filter use-after-free when oversized rewritten response body causes crash
Details

Envoy is an open source edge and service proxy. Envoy versions earlier than 1.36.2, 1.35.6, 1.34.10, and 1.33.12 contain a use-after-free vulnerability in the Lua filter. When a Lua script executing in the response phase rewrites a response body so that its size exceeds the configured perconnectionbufferlimitbytes (default 1MB), Envoy generates a local reply whose headers override the original response headers, leaving dangling references and causing a crash. This results in denial of service. Updating to versions 1.36.2, 1.35.6, 1.34.10, or 1.33.12 fixes the issue. Increasing perconnectionbufferlimitbytes (and for HTTP/2 the initialstreamwindowsize) or increasing perrequestbufferlimitbytes / requestbodybufferlimit can reduce the likelihood of triggering the condition but does not correct the underlying memory safety flaw.

Database specific 
{
    "cwe_ids": [
        "CWE-416"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62504.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/envoyproxy/envoy

Affected ranges

Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
63ee0dc79dce88117c6bd2df5a742f8eb67ea980
Last affected
1dbcf4d36b57c50b3887fda69e991b88eec80dd5
Database specific 
{
    "versions": [
        {
            "introduced": "1.36.0"
        },
        {
            "last_affected": "1.36.1"
        }
    ]
}
Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
0f0984b04e4879f843a3370ad85163951b393d93
Last affected
efeb4433e6d181214c732c67418c7ba0f933d017
Database specific 
{
    "versions": [
        {
            "introduced": "1.350"
        },
        {
            "last_affected": "1.35.5"
        },
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.33.11"
        }
    ]
}
Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
d7809ba2b07fd869d49bfb122b27f6a7977b4d94
Last affected
bae9f08572b88c27ae450e82a258621ef48936c1
Database specific 
{
    "versions": [
        {
            "introduced": "1.34.0"
        },
        {
            "last_affected": "1.34.9"
        }
    ]
}

Affected versions

v1.*
v1.0.0
v1.1.0
v1.10.0
v1.11.0
v1.12.0
v1.13.0
v1.14.0
v1.15.0
v1.16.0
v1.17.0
v1.18.0
v1.18.1
v1.18.2
v1.19.0
v1.2.0
v1.20.0
v1.21.0
v1.22.0
v1.23.0
v1.24.0
v1.25.0
v1.26.0
v1.27.0
v1.28.0
v1.29.0
v1.3.0
v1.30.0
v1.31.0
v1.32.0
v1.33.0
v1.33.1
v1.33.10
v1.33.11
v1.33.2
v1.33.3
v1.33.4
v1.33.5
v1.33.6
v1.33.7
v1.33.8
v1.33.9
v1.34.0
v1.34.1
v1.34.2
v1.34.3
v1.34.4
v1.34.5
v1.34.6
v1.34.7
v1.34.8
v1.34.9
v1.35.0
v1.35.1
v1.35.2
v1.35.3
v1.35.4
v1.35.5
v1.36.0
v1.36.1
v1.4.0
v1.5.0
v1.6.0
v1.7.0
v1.8.0
v1.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-62504.json"