[USN-8216-1] .NET vulnerabilities

========================================================================== Ubuntu Security Notice USN-8216-1 April 28, 2026 dotnet10 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: Summary: Several security issues were fixed in .NET. Software Description: Details: Ludvig Pedersen discovered that the System.Security.Cryptography.Xml library in .NET incorrectly handled certain XML inputs. An attacker could possibly use this issue to consume excessive resources, resulting in a denial of service. (CVE-2026-33116, CVE-2026-26171) Ludvig Pedersen and Kevin Jones discovered that the System.Security.Cryptography.Xml library in .NET incorrectly handled certain XML inputs. An attacker could possibly use this issue to cause .NET to crash, resulting in a denial of service. (CVE-2026-32203) Ludvig Pedersen discovered that the System.Net.Mail component in .NET incorrectly handled certain inputs. An attacker could possibly use this issue to perform a network spoofing attack. (CVE-2026-32178) It was discovered that the Microsoft.AspNetCore.DataProtection library in .NET did not properly verify cryptographic signatures under certain conditions. A remote attacker could possibly use this issue to elevate privileges. (CVE-2026-40372) Update instructions: The problem can be corrected by updating your system to the following package versions: After a standard system update, it is recommended to rotate the DataProtection key ring. References: https://ubuntu.com/security/notices/USN-8216-1 CVE-2026-26171, CVE-2026-32178, CVE-2026-32203, CVE-2026-33116, CVE-2026-40372