USN-8553-1: .NET vulnerabilities

USN-8553-1: .NET vulnerabilities

https://ubuntu.com/security/notices/rss.xml / Thu, 07/16/2026 - 07:05
Artur Stetsko discovered that the .NET did not properly validate authentication data. An attacker could possibly use this issue to elevate privileges. (CVE-2026-47300) Levi Broderick discovered that .NET did not properly handle XML encryption during parsing. An attacker could possibly use this issue to consume excessive resources, resulting in a denial of service. (CVE-2026-47302) Pham Quang Minh discovered that .NET did not properly parse authentication data. An attacker could possibly use this issue to bypass authentication and elevate privileges. (CVE-2026-47303) Levi Broderick discovered that .NET did not properly verify cryptographic signatures during XML encryption. An attacker could possibly use this issue to bypass security features over a network and access encrypted data. (CVE-2026-47304) It was discovered that .NET did not properly validate input during TLS handshakes. An attacker could possibly use this issue to cause .NET to crash, resulting in a denial of service. (CVE-2026-50524) Levi Broderick discovered that .NET did not properly handle resource allocation during XML encryption. An attacker could possibly use this issue to consume excessive resources, resulting in a denial of service. (CVE-2026-50525) Siwei Li discovered that .NET did not properly handle link resolution before file access during the container image build process. A local attacker could possibly use this issue to inject resources that could be incorporated into container images built by other users on the same machine. (CVE-2026-50526) Levi Broderick discovered that .NET did not properly handle memory while performing XML encryption. An attacker could possibly use this issue to cause .NET to crash, resulting in a denial of service. (CVE-2026-50527) Henrique Pereira discovered that .NET did not properly handle authorization checks during TLS/SSL connections. An attacker could possibly use this issue to bypass authorization checks during secure communications. (CVE-2026-50528) It was discovered that .NET did not properly handle resource allocation during XML encryption. An attacker could possibly use this issue to consume excessive resources, resulting in a denial of service. (CVE-2026-50648) Miha Zupan discovered that .NET did not properly limit resource allocation when handling HTTP/2 requests. An attacker could possibly use this issue to consume excessive resources, resulting in a denial of service. (CVE-2026-50651) It was discovered that the .NET SMTP client did not properly handle the encoding or escaping of output. An attacker could possibly use this issue to spoof messages during message routing. (CVE-2026-50659) It was discovered that .NET did not properly validate resource types when parsing X.509 certificates. An attacker could possibly use this issue to cause .NET to crash, resulting in a denial of service. (CVE-2026-57108)

About

Kenya Education Network CERT(KENET-CERT) is a Cybersecurity Emergency Response Team and Co-ordination Center operated by the National Research and Education Network of Kenya. KENET-CERT coordination center promotes awareness on cybersecurity incidences as well as coordinates and assists member institutions in responding effectively to cyber security threats and incidences. KENET-CERT works closely with Kenya's National CIRT coordination center (CIRT/CC) as a sector CIRT for the academic institutions. KENET promotes use of ICT in Teaching, Learning and Research in Higher Education Institutions in Kenya. KENET aims to interconnect all the Universities, Tertiary and Research Institutions in Kenya by setting up a cost effective and sustainable private network with high speed access to the global Internet. KENET also facilitates electronic communication among students and faculties in member institutions, share learning and teaching resources by collaboration in Research and Development of Educational content.