ALPINE-CVE-2026-54478

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a...

AZL-92958 CVE-2026-54478 affecting package unbound for versions less than 1.25.2-1

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a...

CVE-2026-54478

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a...

CVE-2026-54478

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a...

CVE-2026-54478 DNS Cookie bypass when combined with proxy-protocol use

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a...

EUVD-2026-47678

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a...

CVE-2026-54478

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a...

CVE-2026-54478 DNS Cookie bypass when combined with proxy-protocol use

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a...

CVE-2026-54478: Authentication Bypass by Spoofing

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address instead of the PROXYv2-declared client. One server cookie obtained through a...

expat: Fix of CVE-2026-41080

CVE-2026-41080: backport SipHash-based hash-flooding protection with a full 16 bytes of salt entropy and add the XMLSetHashSalt16Bytes API...

SUSE CVE-2026-23247

In the Linux kernel, the following vulnerability has been resolved: tcp: secureseq: add back ports to TS offset This reverts 28ee1b746f49 "secureseq: downgrade to per-host timestamp offsets" tcptwrecycle went away in 2017. Zhouyan Deng reported off-path TCP source port leakage via SYN cookie...

EUVD-2026-12810

In the Linux kernel, the following vulnerability has been resolved: tcp: secureseq: add back ports to TS offset This reverts 28ee1b746f49 "secureseq: downgrade to per-host timestamp offsets" tcptwrecycle went away in 2017. Zhouyan Deng reported off-path TCP source port leakage via SYN cookie...

CVE-2026-23247

In the Linux kernel, the following vulnerability has been resolved: tcp: secureseq: add back ports to TS offset This reverts 28ee1b746f49 "secureseq: downgrade to per-host timestamp offsets" tcptwrecycle went away in 2017. Zhouyan Deng reported off-path TCP source port leakage via SYN cookie...

CVE-2026-23247

In the Linux kernel, the following vulnerability has been resolved: tcp: secureseq: add back ports to TS offset This reverts 28ee1b746f49 "secureseq: downgrade to per-host timestamp offsets" tcptwrecycle went away in 2017. Zhouyan Deng reported off-path TCP source port leakage via SYN cookie...

UBUNTU-CVE-2026-23247

In the Linux kernel, the following vulnerability has been resolved: tcp: secureseq: add back ports to TS offset This reverts 28ee1b746f49 "secureseq: downgrade to per-host timestamp offsets" tcptwrecycle went away in 2017. Zhouyan Deng reported off-path TCP source port leakage via SYN cookie...

CVE-2026-23247 tcp: secure_seq: add back ports to TS offset

In the Linux kernel, the following vulnerability has been resolved: tcp: secureseq: add back ports to TS offset This reverts 28ee1b746f49 "secureseq: downgrade to per-host timestamp offsets" tcptwrecycle went away in 2017. Zhouyan Deng reported off-path TCP source port leakage via SYN cookie...

CVE-2026-23247

In the Linux kernel, the following vulnerability has been resolved: tcp: secureseq: add back ports to TS offset This reverts 28ee1b746f49 "secureseq: downgrade to per-host timestamp offsets" tcptwrecycle went away in 2017. Zhouyan Deng reported off-path TCP source port leakage via SYN cookie...

CVE-2026-23247 tcp: secure_seq: add back ports to TS offset

In the Linux kernel, the following vulnerability has been resolved: tcp: secureseq: add back ports to TS offset This reverts 28ee1b746f49 "secureseq: downgrade to per-host timestamp offsets" tcptwrecycle went away in 2017. Zhouyan Deng reported off-path TCP source port leakage via SYN cookie...

CVE-2026-23247

CVE-2026-23247 is a Linux kernel TCP/TCP options issue that reintroduces port inclusion in the TS offset to mitigate an off-path TCP source port leakage via a SYN-cookie side-channel. The vulnerability is resolved by reverting a previous downgrade of timestamp offsets and performing a single siph...

Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003697)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003697 advisory. The flowdissector feature in the Linux kernel 4.3 through 5.x before 5.3.10 has a device tracking vulnerability, aka CID-55667441c84f. This occurs because the auto...