Envoy HTTP: OAuth2 filter late async token completion after stream teardown (UAF / crash risk)
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| envoyproxy | envoy | affected |
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Configuration 1 [-]
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No data.
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| Envoyproxy | Envoy |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.579% probability within 30 days)
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Envoyproxy
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Envoyproxy envoy |
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| Description | Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, the HTTP OAuth2 filter (envoy.filters.http.oauth2) can leave an in-flight async token exchange attached to a downstream stream that has already been torn down. A late AsyncClient completion can still invoke OAuth2Filter methods that use StreamDecoderFilterCallbacks after that object’s lifetime has ended, causing undefined behavior, worker crashes (availability loss), and use-after-free / invalid-vptr failures under AddressSanitizer. This is a memory-safety / lifetime issue in the data plane, not a trivial config bug. Remote code execution is not claimed here; the primary demonstrated impact is DoS via crash and UB; any further impact would be deployment- and allocator-dependent. This vulnerability is fixed in 1.37.5 and 1.38.3. | |
| Title | Envoy HTTP: OAuth2 filter late async token completion after stream teardown (UAF / crash risk) | |
| Weaknesses | CWE-416 | |
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cvssV3_1
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