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OpenAdvisories
High WID-SEC-2026-3638 14 CVEs

OpenSSL: Mehrere Schwachstellen

Published Sep 29, 2026 · Updated Nov 12, 2026 · Revision 24 · de

Vendor: amazon Vendor: Debian Vendor: IBM Vendor: NETAPP Vendor: Oracle Vendor: Red Hat Vendor: RESF Vendor: SUSE Vendor: Ubuntu Product: ActiveIQ Unified Manager Product: AIX Product: App Connect Enterprise Product: Data ONTAP Product: Enterprise Linux Product: i Product: Linux Product: Linux Product: Linux Product: Linux Product: Linux 2 Product: openSUSE Product: Rocky Linux Product: Semeru Runtime Product: VIOS Platform: Windows

Summary

Ein Angreifer kann mehrere Schwachstellen in OpenSSL ausnutzen, um Sicherheitsvorkehrungen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren und einen Denial-of-Service-Zustand zu verursachen.

Product

OpenSSL ist eine im Quelltext frei verfügbare Bibliothek, die Secure Sockets Layer (SSL) und Transport Layer Security (TLS) implementiert.

Vulnerabilities 14

  • High 8.2
    CVE-2026-84782

    DTLS Retransmits Handshake Messages From a Stale Buffer Offset

    Issue summary: The DTLS retransmission logic does not correctly handle a handshake message write that is suspended part-way through. The retransmitted message can be read past the message buffer and the retransmission overwrites the internal state the suspend…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2026-54873

    QUIC STREAM Fragment Metadata DoS

    Issue summary: QUIC process may keep memory for QUIC packet buffer for much longer period than necessary. Impact summary: Remote peer can exploit this vulnerability by sending maliciously crafted packets, making the local QUIC stack to keep the memory for pac…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Wolfi
  • High 7.5
    CVE-2026-72897

    Out-of-Bounds Access After SSL_set_SSL_CTX() During a Handshake

    Issue summary: A TLS server that calls SSL_set_SSL_CTX() to switch a connection to a different SSL_CTX part way through a handshake may access memory beyond the end of an internal array if the replacement context knows about more provider signature algorithms…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2026-84783

    Use-After-Free in X.509 Extension Cache Under Concurrent Use

    Issue summary: The first concurrent use of the same X.509 certificate by several threads may cause its cached extension data to be freed while another thread is still using it. Impact summary: A remote, unauthenticated peer could crash a multi-threaded TLS cl…

    OpenSSL OpenSSL nodejs openssl-4.0 Ubuntu Wolfi
  • High 7.5
    CVE-2026-84784

    QUIC: Unbounded RETIRE_CONNECTION_ID Backlog

    Issue summary: A malicious remote peer may flood the local QUIC stack with NEW_CONNECTION_ID frames by avoiding a limit check on how many connection IDs the remote QUIC stack can use. Impact summary: The local QUIC stack sends a RETIRE_CONN_ID frame for every…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • Medium 5.3
    CVE-2026-35189

    Excessive Memory Allocation in Relative CRLDP Processing

    Issue summary: A certificate with many nameRelativeToCRLIssuer CRL distribution points causes disproportionate heap growth when OpenSSL caches X.509 extensions. Impact summary: Receiving a crafted certificate from a malicious peer can lead to significant memo…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • Medium 5.3
    CVE-2026-42772

    Potential CPU DoS via O(n^2) Fragment Reassembly in QUIC

    Issue summary: The QUIC stream reassembly algorithm performance deteriorates progressively as packets are arriving out of order. The worst case has a quadratic complexity proportional to the number of stream frames kept in the buffer for the received stream d…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Wolfi
  • Medium 5.3
    CVE-2026-75804

    QUIC Connection-Level Flow Control is Not Enforced for Streams

    Issue summary: OpenSSL QUIC stack does not enforce connection level flow control for streams. Remote peers may send more bytes as long as they fit within the stream flow control limits. Impact summary: A malicious remote peer may exploit the lack of connectio…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • Medium 5.3
    CVE-2026-75805

    NULL Pointer Dereference in CMP Client Revocation Response Handling

    Issue summary: A CMP client that requests certificate revocation on the basis of a PKCS#10 CSR may dereference a NULL pointer and terminate abnormally when processing a crafted revocation response. Impact summary: The NULL pointer dereference happens on a rea…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • Medium 5.3
    CVE-2026-75806

    Unauthenticated and Undersized DTLS 1.2 AEAD Record Causes DoS

    Issue summary: An established DTLS 1.2 association using an AEAD cipher suite can be terminated by a single unauthenticated datagram whose encrypted fragment is shorter than the mandatory explicit IV and authentication tag overhead. Impact summary: An attacke…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • Low 3.7
    CVE-2026-35191

    QUIC Unvalidated Amplification Credit may be Over Accounted

    Issue summary: The OpenSSL QUIC server, when configured to not preform address validation, can be forced to count incoming packets multiple times in its unvalidated credit computation, leading to a violation of the RFC 9000 unvalidated connection amplificatio…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Wolfi
  • Low 3.7
    CVE-2026-54872

    Timing Side-Channel in Scalar Multiplication for Non-NIST EC Curves

    Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to me…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • Low 3.7
    CVE-2026-54875

    Non-Constant-Time SM2 Scalar Multiplication on ARM64 and RISC-V

    Issue summary: A non-constant-time optimized implementation of scalar point multiplication is used for SM2 private key operations on ARM64 and RISC-V platforms. Impact summary: An attacker able to measure the time taken by, or to observe the cache-line access…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • Low 3.7
    CVE-2026-77696

    Timing Side-Channel in SM2 Signature Generation

    Issue summary: SM2 signature generation uses non-constant-time arithmetic on secret values, forming a timing side-channel. Impact summary: An attacker able to measure SM2 signing times may learn information about the per-signature secret nonce, which over man…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi

Revision history

  1. #24

    Neue Updates von Red Hat aufgenommen

  2. #23

    Neue Updates von SUSE und Red Hat aufgenommen

  3. #22

    Neue Updates von SUSE, IBM und IBM-APAR aufgenommen

  4. #21

    Neue Updates von Red Hat aufgenommen

  5. #20

    Neue Updates von Red Hat aufgenommen

  6. #19

    Neue Updates von SUSE und IBM aufgenommen

  7. #18

    Neue Updates von Red Hat aufgenommen

  8. #17

    Neue Updates von Amazon aufgenommen

  9. #16

    Neue Updates von Red Hat aufgenommen

  10. #15

    Neue Updates von IBM aufgenommen

  11. #14

    Neue Updates von Red Hat und Amazon aufgenommen

  12. #13

    Neue Updates von Red Hat aufgenommen

  13. #12

    Neue Updates von Oracle Linux aufgenommen

  14. #11

    Neue Updates von SUSE, Red Hat und Oracle Linux aufgenommen

  15. #10

    Neue Updates von openSUSE aufgenommen

  16. #9

    Neue Updates von SUSE und Rocky Enterprise Software Foundation aufgenommen

  17. #8

    Neue Updates von Amazon und Oracle Linux aufgenommen

  18. #7

    Neue Updates von Red Hat und Rocky Enterprise Software Foundation aufgenommen

  19. #6

    Neue Updates von Red Hat, Oracle Linux und Rocky Enterprise Software Foundation aufgenommen

  20. #5

    Neue Updates von SUSE aufgenommen

  21. #4

    Neue Updates von SUSE aufgenommen

  22. #3

    Neue Updates von Ubuntu aufgenommen

  23. #2

    Neue Updates von Red Hat aufgenommen

  24. #1

    Initiale Fassung

References