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A use-after-free vulnerability exists in NGINX Open Source and NGINX Plus in ngx_http_ssl_module during client-certificate verification and OCSP processing. The flaw is reachable when ssl_verify_client is configured as on or optional, and ssl_ocsp is enabled or OCSP leaf parameters are configured with a resolver. If a TLS connection closes before asynchronous OCSP DNS resolution completes, the request context pool can be destroyed without cancelling the outstanding resolver request. When the resolver timer later fires, it dereferences a freed pointer, causing a heap use-after-free in the NGINX worker process.
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No valid public exploits. Mallory filtered out 3 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Another memory corruption vulnerability identified during the same NGINX research process, but not the primary focus of the reference.
An NGINX ngx_http_ssl_module SSL-related vulnerability mentioned only in a historical list.
A medium-severity use-after-free vulnerability in NGINX ngx_http_ssl_module involving asynchronous OCSP DNS resolution after TLS connection closure.
A use-after-free vulnerability in NGINX ngx_http_ssl_module that may allow limited data modification or worker restart when specific client verification and OCSP settings are enabled.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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