========================================================================== Ubuntu Security Notice USN-8511-1 July 06, 2026
socat vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 24.04 LTS Summary: Several security issues were fixed in socat. Software Description: - socat: multipurpose relay for bidirectional data transfer Details: It was discovered that socat incorrectly handled the SOCKS5 proxy server reply parser. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2026-56123) It was discovered that socat incorrectly handled a sample script. A local attacker could possibly use this issue to overwrite arbitrary files. This issue only affected Ubuntu 24.04 LTS. (CVE-2024-54661) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 26.04 LTS socat 1.8.1.1-1ubuntu0.1 Ubuntu 24.04 LTS socat 1.8.0.0-4ubuntu0.1 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8511-1 CVE-2024-54661, CVE-2026-56123 Package Information: https://launchpad.net/ubuntu/+source/socat/1.8.1.1-1ubuntu0.1 https://launchpad.net/ubuntu/+source/socat/1.8.0.0-4ubuntu0.1
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