USN-8958-1

    Dashboard / Vulnerabilities / USN-8958-1

    USN-8958-1

    Published: 29 Oct 2026Last Modified: 31 Oct 2026

    Summary: dotnet8, dotnet10, dotnet11 vulnerabilities

    Details: It was discovered that the .NET Blazor WebAssembly debug proxy did not properly escape certain values. An attacker could possibly use this issue to execute arbitrary code. The fix for this CVE was originally released via USN-8942-1, but it was found to be incomplete. This issue only affected dotnet10 and dotnet11. (CVE-2026-102870) It was discovered that the Brotli decompression library used by .NET incorrectly handled certain compressed streams. A remote attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-111497) Alen Cheung discovered that .NET did not properly handle file ownership in certain circumstances. An attacker could possibly use this issue to elevate local privileges. (CVE-2026-114148)

    References: https://ubuntu.com/security/notices/USN-8958-1, https://ubuntu.com/security/CVE-2026-102870, https://ubuntu.com/security/CVE-2026-111497, https://ubuntu.com/security/CVE-2026-114148

    Affected packages

    Package

    Name: dotnet8

    Purl: pkg:deb/ubuntu/dotnet8?arch=source&distro=jammy

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -8.0.133-8.0.33-0ubuntu1~22.04.1

    Affected versions

    8.0.102-8.0.2-0ubuntu1~22.04.1
    8.0.103-8.0.3-0ubuntu1~22.04.1
    8.0.103-8.0.3-0ubuntu1~22.04.2
    8.0.105-8.0.5-0ubuntu1~22.04.1
    8.0.107-8.0.7-0ubuntu1~22.04.1
    8.0.108-8.0.8-0ubuntu1~22.04.1
    8.0.110-8.0.10-0ubuntu1~22.04.1
    8.0.111-8.0.11-0ubuntu1~22.04.1
    8.0.112-8.0.12-0ubuntu1~22.04.1
    8.0.114-8.0.14-0ubuntu1~22.04.1
    8.0.115-8.0.15-0ubuntu1~22.04.1
    8.0.116-8.0.16-0ubuntu1~22.04.1
    8.0.117-8.0.17-0ubuntu1~22.04.1
    8.0.118-8.0.18-0ubuntu1~22.04.1
    8.0.119-8.0.19-0ubuntu1~22.04.1
    8.0.120-8.0.20-0ubuntu1~22.04.1
    8.0.121-8.0.21-0ubuntu1~22.04.1
    8.0.122-8.0.22-0ubuntu1~22.04.1
    8.0.123-8.0.23-0ubuntu1~22.04.1
    8.0.124-8.0.24-0ubuntu1~22.04.1
    8.0.125-8.0.25-0ubuntu1~22.04.1
    8.0.126-8.0.26-0ubuntu1~22.04.1
    8.0.127-8.0.27-0ubuntu1~22.04.1
    8.0.128-8.0.28-0ubuntu1~22.04.1
    8.0.129-8.0.29-0ubuntu1~22.04.1
    8.0.130-8.0.30-0ubuntu1~22.04.1
    8.0.131-8.0.31-0ubuntu1~22.04.1
    8.0.132-8.0.32-0ubuntu1~22.04.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    USN-8958-1 | CVE-DB