========================================================================== Ubuntu Security Notice USN-8063-1 February 25, 2026
protobuf vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: Protocol Buffers could be made to consume resources if it received specially crafted input. Software Description: - protobuf: protocol buffers data serialization library Details: It was discovered that Protocol Buffers incorrectly handled recursion when the Python google.protobuf.json_format.ParseDict() function is being used. An attacker could possibly use this issue to cause Protocol Buffers to consume resources, resulting in a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 libprotobuf32t64 3.21.12-11ubuntu3.1 python3-protobuf 3.21.12-11ubuntu3.1 Ubuntu 24.04 LTS libprotobuf32t64 3.21.12-8.2ubuntu0.3 python3-protobuf 3.21.12-8.2ubuntu0.3 Ubuntu 22.04 LTS libprotobuf23 3.12.4-1ubuntu7.22.04.6 python3-protobuf 3.12.4-1ubuntu7.22.04.6 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8063-1 CVE-2026-0994 Package Information: https://launchpad.net/ubuntu/+source/protobuf/3.21.12-11ubuntu3.1 https://launchpad.net/ubuntu/+source/protobuf/3.21.12-8.2ubuntu0.3 https://launchpad.net/ubuntu/+source/protobuf/3.12.4-1ubuntu7.22.04.6
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