Missing Release of Memory after Effective Lifetime Affecting openssl package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published6 Aug 2026
- disclosed5 Aug 2026
- creditUnknown
Introduced: 5 Aug 2026
NewCVE-2026-54876 (opens in a new tab)How to fix?
There is no fixed version for openssl.
Overview
Affected versions of this package are vulnerable to Missing Release of Memory after Effective Lifetime through the check_cert_ocsp_resp() function in crypto/x509/x509_vfy.c. An attacker can exhaust memory in a TLS client by supplying a stapled OCSP BasicResponse with no single-response entries while OCSP response checking is enabled. The vulnerable code allocates an owning OCSP_BASICRESP from the peer’s OCSP response and returns early when OCSP_resp_count(bs) < 1, skipping the cleanup path that frees bs. Repeating the handshake against a malicious server leaks attacker-influenced memory on each connection, eventually causing the client application to run out of memory and fail.