{"schema_version":"1.7.2","id":"OESA-2026-2943","modified":"2026-07-09T12:53:41Z","published":"2026-07-09T12:53:41Z","upstream":["CVE-2026-56123"],"summary":"socat security update","details":"Socat is a relay for bidirectional data transfer between two independent data channels. Each of these data channels may be a file, pipe, device (serial line etc. or a pseudo terminal), a socket (UNIX, IP4, IP6 - raw, UDP, TCP), an SSL socket, proxy CONNECT connection, a file descriptor (stdin etc.), the GNU line editor (readline), a program, or a combination of two of these.\r\n\r\nSecurity Fix(es):\n\nsocat versions 1.8.0.0 through 1.8.1.1 contain a heap-based buffer overflow vulnerability that allows a malicious SOCKS5 proxy server to overwrite adjacent heap memory by exploiting a sign-extension flaw in the DOMAINNAME reply parser. During connection setup, the domain name length byte is read through a signed char field causing a negative bytes_to_read value that is implicitly converted to size_t, resulting in an unbounded heap write into the 262-byte reply buffer with attacker-controlled size and content.(CVE-2026-56123)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP1","name":"socat","purl":"pkg:rpm/openEuler/socat&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.1.3-1.oe2403sp1"}]}],"ecosystem_specific":{"aarch64":["socat-1.8.1.3-1.oe2403sp1.aarch64.rpm","socat-debuginfo-1.8.1.3-1.oe2403sp1.aarch64.rpm","socat-debugsource-1.8.1.3-1.oe2403sp1.aarch64.rpm"],"noarch":["socat-help-1.8.1.3-1.oe2403sp1.noarch.rpm"],"src":["socat-1.8.1.3-1.oe2403sp1.src.rpm"],"x86_64":["socat-1.8.1.3-1.oe2403sp1.x86_64.rpm","socat-debuginfo-1.8.1.3-1.oe2403sp1.x86_64.rpm","socat-debugsource-1.8.1.3-1.oe2403sp1.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2943"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56123"}],"database_specific":{"severity":"Critical"}}