OpenSSL 3.6.1 is a security patch release. The most severe CVE fixed in this
release is High.

This release incorporates the following bug fixes and mitigations:

• Fixed Improper validation of PBMAC1 parameters in PKCS#12 MAC verification.
  (CVE-2025-11187)

• Fixed Stack buffer overflow in CMS AuthEnvelopedData parsing.
  (CVE-2025-15467)

• Fixed NULL dereference in SSL_CIPHER_find() function on unknown cipher ID.
  (CVE-2025-15468)

• Fixed openssl dgst one-shot codepath silently truncates inputs >16 MiB.
  (CVE-2025-15469)

• Fixed TLS 1.3 CompressedCertificate excessive memory allocation.
  (CVE-2025-66199)

• Fixed Heap out-of-bounds write in BIO_f_linebuffer on short writes.
  (CVE-2025-68160)

• Fixed Unauthenticated/unencrypted trailing bytes with low-level OCB
  function calls.
  (CVE-2025-69418)

• Fixed Out of bounds write in PKCS12_get_friendlyname() UTF-8 conversion.
  (CVE-2025-69419)

• Fixed Missing ASN1_TYPE validation in TS_RESP_verify_response()
  function.
  (CVE-2025-69420)

• Fixed NULL Pointer Dereference in PKCS12_item_decrypt_d2i_ex() function.
  (CVE-2025-69421)

• Fixed Missing ASN1_TYPE validation in PKCS#12 parsing.
  (CVE-2026-22795)

• Fixed ASN1_TYPE Type Confusion in the PKCS7_digest_from_attributes()
  function.
  (CVE-2026-22796)

• Fixed a regression in X509_V_FLAG_CRL_CHECK_ALL flag handling by
  restoring its pre-3.6.0 behaviour.

• Fixed a regression in handling stapled OCSP responses causing handshake
  failures for OpenSSL 3.6.0 servers with various client implementations.