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Packages - openssl - Secure Socket Layer (SSL) cryptographic library and tools Details It was discovered that OpenSSL incorrectly allocated memory buffers in the SSL/TLS state machine when receiving handshake data. A remote attacker could possibly use this issue to cause OpenSSL to consume excessive memory, leading to a denial of service. This issue is known as the "HollowByte" denial of service. It was discovered that OpenSSL incorrectly allocated memory buffers in the SSL/TLS state machine when receiving handshake data. A remote attacker could possibly use this issue to cause OpenSSL to consume excessive memory, leading to a denial of service. This issue is known as the "HollowByte" denial of service. Update instructions After a standard system update you need to reboot your computer to make all the necessary changes. Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | || |---|---|---|---| | 26.04 LTS resolute | libssl3t64 – 3.5.5-1ubuntu3.3 | || | openssl – 3.5.5-1ubuntu3.3 | ||| | 24.04 LTS noble | libssl3t64 – 3.0.13-0ubuntu3.12 | || | openssl – 3.0.13-0ubuntu3.12 | ||| | 22.04 LTS jammy | libssl3 – 3.0.2-0ubuntu1.26 | || | openssl – 3.0.2-0ubuntu1.26 | Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.