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
2026-08-12T15:14:25.162054Z
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 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-416"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62504.json"
}
References

Affected packages

Git / github.com/envoyproxy/envoy

Affected ranges

Type
GIT
Repo
https://github.com/envoyproxy/envoy
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
d602fb5d4af3ef3740621590e59187233398e0c0
Introduced
d7809ba2b07fd869d49bfb122b27f6a7977b4d94
Fixed
40ab4828a48f05103573ddee3c807dfa0e3e23f7
Introduced
84305a6cb64bd55aaf606bdd53de7cd6080427a1
Fixed
0d240c4b0f5b5db91ef14b1bf424520144b1a75d
Introduced
63ee0dc79dce88117c6bd2df5a742f8eb67ea980
Fixed
dc2d3098ae5641555f15c71d5bb5ce0060a8015c
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.33.12"
        },
        {
            "introduced": "1.34.0"
        },
        {
            "fixed": "1.34.10"
        },
        {
            "introduced": "1.35.0"
        },
        {
            "fixed": "1.35.6"
        },
        {
            "introduced": "1.36.0"
        },
        {
            "fixed": "1.36.2"
        }
    ],
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*"
}

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"
vanir_signatures 
[
    {
        "target": {
            "function": "initializeAndSendRequest",
            "file": "test/extensions/filters/http/lua/lua_integration_test.cc"
        },
        "deprecated": false,
        "source": "https://github.com/envoyproxy/envoy/commit/d602fb5d4af3ef3740621590e59187233398e0c0",
        "id": "CVE-2025-62504-88355bc5",
        "signature_version": "v1",
        "digest": {
            "length": 518.0,
            "function_hash": "165642250652000326040510822155034200423"
        },
        "signature_type": "Function"
    },
    {
        "target": {
            "file": "test/extensions/filters/http/lua/lua_integration_test.cc"
        },
        "deprecated": false,
        "source": "https://github.com/envoyproxy/envoy/commit/d602fb5d4af3ef3740621590e59187233398e0c0",
        "id": "CVE-2025-62504-ab17abb2",
        "signature_version": "v1",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "162488919370654621747968747814311909444",
                "226810983615114271767370501606946940034",
                "247158085973556930605318978211228881856",
                "16464986695022144028157521654265706545",
                "268562523828584306666449027530784370520",
                "289331889019161617442261340445171339384",
                "226755889304640551085226826470812298212",
                "125556476522841732105641329883230102978",
                "92782970941617784783877127396472631273",
                "26342928292701913776309469656215839047",
                "64802572305607210945017202571330832127",
                "200311650960572541836036539434112614517",
                "322558152584984203883389806220749756083",
                "145995788222018242579128276155535689277",
                "261354598300289774921753314927633111741",
                "14201599612969965236895294738190866472"
            ]
        },
        "signature_type": "Line"
    },
    {
        "target": {
            "function": "initializeFilter",
            "file": "test/extensions/filters/http/lua/lua_integration_test.cc"
        },
        "deprecated": false,
        "source": "https://github.com/envoyproxy/envoy/commit/d602fb5d4af3ef3740621590e59187233398e0c0",
        "id": "CVE-2025-62504-fd5175a2",
        "signature_version": "v1",
        "digest": {
            "length": 1785.0,
            "function_hash": "191732576676655761653032722877931014598"
        },
        "signature_type": "Function"
    }
]
vanir_signatures_modified 
"2026-08-12T15:14:25Z"