CVE-2026-63075

OpenSSL's QUIC stack retains ACK-only packet metadata in its packet history for the full lifetime of a connection. Since ACK-only packets are not ack-eliciting, a remote peer that completes a QUIC handshake can force repeated ACK-only packet transmission (e.g., by sending numerous PING frames ) a...

CVE-2026-63075

Issue summary: When OpenSSL processes QUIC traffic from a peer that repeatedly sends ack-eliciting packets while not acknowledging ACK-only responses, the QUIC stack can retain ACK-only packet metadata for the lifetime of the connection. Impact summary: A remote peer that can complete a QUIC...

CVE-2026-18798 QUIC Server May Trigger Double Free When Processing INITIAL Packet

Issue summary: QUIC server may double free QRX QUIC record layer RX object when channel creation fails for initial packet. Impact summary: Double free leads to heap corruption, which typically results in termination of QUIC server process, leading to Denial of Service. There is so far no evidence...

EUVD-2026-65480

Issue summary: QUIC server may double free QRX QUIC record layer RX object when channel creation fails for initial packet. Impact summary: Double free leads to heap corruption, which typically results in termination of QUIC server process, leading to Denial of Service. There is so far no evidence...

CVE-2026-18798

Issue summary: QUIC server may double free QRX QUIC record layer RX object when channel creation fails for initial packet. Impact summary: Double free leads to heap corruption, which typically results in termination of QUIC server process, leading to Denial of Service. There is so far no evidence...

CVE-2026-18798 QUIC Server May Trigger Double Free When Processing INITIAL Packet

Issue summary: QUIC server may double free QRX QUIC record layer RX object when channel creation fails for initial packet. Impact summary: Double free leads to heap corruption, which typically results in termination of QUIC server process, leading to Denial of Service. There is so far no evidence...

CVE-2026-18798

CVE-2026-18798 is a double free (CWE-415) in the OpenSSL QUIC stack. When a QUIC server processes an INITIAL packet carrying a DCID shorter than 8 bytes , port_bind_channel() fails after enrolling the DCID and frees the QRX object. The caller port_default_packet_handler() then frees the same QRX ...

CVE-2026-18798 QUIC Server May Trigger Double Free When Processing INITIAL Packet

Issue summary: QUIC server may double free QRX QUIC record layer RX object when channel creation fails for initial packet. Impact summary: Double free leads to heap corruption, which typically results in termination of QUIC server process, leading to Denial of Service. There is so far no evidence...

CVE-2026-18798

Issue summary: QUIC server may double free QRX QUIC record layer RX object when channel creation fails for initial packet. Impact summary: Double free leads to heap corruption, which typically results in termination of QUIC server process, leading to Denial of Service. There is so far no evidence...

PT-2026-81524

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An information leak exists in the QUIC protocol, which is a transport layer network protocol designed to reduce connection latency. A remote attacker can leak sensitive information by...

PT-2026-81300

Name of the Vulnerable Software and Affected Versions OpenSSL versions prior to 3.5.3-8.1 Description A double free issue exists in the QUIC server when processing an INITIAL packet. The default packet handler port default packet handler creates a QRX QUIC record layer RX object for packet...

UBUNTU-CVE-2026-63075

Issue summary: When OpenSSL processes QUIC traffic from a peer that repeatedly sends ack-eliciting packets while not acknowledging ACK-only responses, the QUIC stack can retain ACK-only packet metadata for the lifetime of the connection. Impact summary: A remote peer that can complete a QUIC...

UBUNTU-CVE-2026-18798

Issue summary: QUIC server may double free QRX QUIC record layer RX object when channel creation fails for initial packet. Impact summary: Double free leads to heap corruption, which typically results in termination of QUIC server process, leading to Denial of Service. There is so far no evidence...

PT-2026-81577

Name of the Vulnerable Software and Affected Versions Google Chrome versions prior to 152.0.7977.65 Description An externally controlled reference in the QUIC protocol allows a remote attacker to bypass the web origin policy through the use of a crafted HTML page. QUIC is a transport layer networ...

Linux Distros Unpatched Vulnerability : CVE-2026-18798

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Issue summary: QUIC server may double free QRX QUIC record layer RX object when channel creation fails for initial packet. Impact summary: Double free leads to...

Linux Distros Unpatched Vulnerability : CVE-2026-63075

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Issue summary: When OpenSSL processes QUIC traffic from a peer that repeatedly sends ack-eliciting packets while not acknowledging ACK-only responses, the QUIC...

OpenSSL -- Multiple vulnerabilities

The OpenSSL poject reports: Heap Buffer Overflow in CMS Key Unwrapping CVE-2026-63072 Moderate Invalid Pointer Dereference in CMP Server via Crafted protectionAlg CVE-2026-63076 Moderate RPK Server Signature Algorithm Selection Can Dereference a Missing Certificate CVE-2026-14457 Low Excessive...

CVE-2026-18798

Issue summary: QUIC server may double free QRX QUIC record layer RX object when channel creation fails for initial packet. Impact summary: Double free leads to heap corruption, which typically results in termination of QUIC server process, leading to Denial of Service. There is so far no evidence...

CVE-2026-63075

Issue summary: When OpenSSL processes QUIC traffic from a peer that repeatedly sends ack-eliciting packets while not acknowledging ACK-only responses, the QUIC stack can retain ACK-only packet metadata for the lifetime of the connection. Impact summary: A remote peer that can complete a QUIC...

PT-2026-81306

Name of the Vulnerable Software and Affected Versions OpenSSL affected versions not specified Description When processing QUIC traffic, the QUIC stack may retain metadata for ACK-only packets for the entire duration of a connection if a peer repeatedly sends ack-eliciting packets without...