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-2026-63075

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...

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...

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...

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...

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...

Astra Linux – Vulnerability in Firefox, NSS

Calling PK11Encrypt in NSS using CKMCHACHA20 and the same buffer for input and output can result in plaintext on an Intel Sandy Bridge processor. In Firefox, this only affects the QUIC header protection feature when the connection uses the ChaCha20-Poly1305 cipher suite. The most likely outcome i...

Astra Linux – Vulnerability in Chromium

Using “after free” in QUIC in Google Chrome before version 148.0.7778.179 allowed a remote attacker to execute arbitrary code within a sandbox through malicious network traffic. Chromium security severity: High...

Astra Linux – Vulnerability in Chromium

The use of “after free” in QUIC in Google Chrome before version 124.0.6367.60 allowed a remote attacker who had compromised the renderer process to potentially exploit heap corruption through a crafted HTML page. Chromium security severity: Medium...

Astra Linux – Vulnerability in curl

libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. As a result, it does not detect impostor attacks or man-in-the-middle attacks...

Astra Linux – Vulnerability in Firefox

Data was not properly sanitized during the decoding of a QUIC ACK frame; this could have led to unrestricted memory consumption and a crash. This vulnerability affects Firefox versions earlier than 124...

Astra Linux – Vulnerability in Chromium

Insufficient validation of untrusted input in QUIC in Google Chrome prior to 97.0.4692.71 allowed a remote attacker to perform header splitting via malicious network traffic. Chromium security severity: Low...