ALSA-2026:41895

Vulnerability from osv_almalinux – Published: 2026-07-20 00:00 – Updated: 2026-08-19 21:10 – Source website
VLAI
Summary
Important: .NET 9.0 security, bug fix, and enhancement update
Details

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.119 and .NET Runtime 9.0.18.

Security Fix(es):

  • dotnet: SocketsHttpHandler Http2Connection - HTTP/2 SETTINGS/PING ACK flood causing OOM (CVE-2026-50651)
  • dotnet: .NET Core: Denial of Service via type confusion (CVE-2026-57108)
  • ASP.NET Core: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-56170)
  • ASP.NET Core: ASP.NET Core: Privilege Escalation via Incorrect Authentication Algorithm (CVE-2026-47300)
  • ASP.NET Core: ASP.NET Core: Privilege Elevation via Authentication Bypass (CVE-2026-47303)
  • dotnet: .NET Security Feature Bypass Vulnerability (CVE-2026-47304)
  • dotnet: .NET: Denial of Service vulnerability due to uncontrolled resource allocation (CVE-2026-47302)
  • dotnet: .NET Framework: Privilege escalation via code injection (CVE-2026-50650)
  • dotnet: .NET: Security feature bypass due to incorrect authorization (CVE-2026-50528)
  • dotnet: .NET: Local code execution via deserialization of untrusted data (CVE-2026-50649)
  • dotnet: .NET: Local tampering via improper link resolution (CVE-2026-50526)
  • dotnet: .NET Framework: Local Code Execution via Protection Mechanism Failure (CVE-2026-50646)
  • dotnet: .NET Framework: Denial of Service via network-based buffer overflow (CVE-2026-50527)
  • dotnet: .NET Framework: Remote Denial of Service due to uncontrolled resource allocation (CVE-2026-50648)
  • .NET: .NET: Network Spoofing Vulnerability (CVE-2026-50659)
  • dotnet: .NET Framework: Denial of Service via improper input validation (CVE-2026-50524)

Bug Fix(es) and Enhancement(s):

  • Update .NET 9.0 to SDK 9.0.119 and Runtime 9.0.18 [almalinux-10.2.z] (JIRA:AlmaLinux-192473)
  • dotnet9.0: Reduce time to detect hanging builds during .NET RPM builds (c10s) [almalinux-10.2.z] (JIRA:AlmaLinux-192330)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References
https://access.redhat.com/errata/RHSA-2026:41895 ADVISORY
https://access.redhat.com/security/cve/CVE-2026-47300 REPORT
https://access.redhat.com/security/cve/CVE-2026-47302 REPORT
https://access.redhat.com/security/cve/CVE-2026-47303 REPORT
https://access.redhat.com/security/cve/CVE-2026-47304 REPORT
https://access.redhat.com/security/cve/CVE-2026-50524 REPORT
https://access.redhat.com/security/cve/CVE-2026-50526 REPORT
https://access.redhat.com/security/cve/CVE-2026-50527 REPORT
https://access.redhat.com/security/cve/CVE-2026-50528 REPORT
https://access.redhat.com/security/cve/CVE-2026-50646 REPORT
https://access.redhat.com/security/cve/CVE-2026-50648 REPORT
https://access.redhat.com/security/cve/CVE-2026-50649 REPORT
https://access.redhat.com/security/cve/CVE-2026-50650 REPORT
https://access.redhat.com/security/cve/CVE-2026-50651 REPORT
https://access.redhat.com/security/cve/CVE-2026-50659 REPORT
https://access.redhat.com/security/cve/CVE-2026-56170 REPORT
https://access.redhat.com/security/cve/CVE-2026-57108 REPORT
https://bugzilla.redhat.com/2499217 REPORT
https://bugzilla.redhat.com/2500109 REPORT
https://bugzilla.redhat.com/2500189 REPORT
https://bugzilla.redhat.com/2500492 REPORT
https://bugzilla.redhat.com/2500502 REPORT
https://bugzilla.redhat.com/2500509 REPORT
https://bugzilla.redhat.com/2500515 REPORT
https://bugzilla.redhat.com/2500556 REPORT
https://bugzilla.redhat.com/2500562 REPORT
https://bugzilla.redhat.com/2500563 REPORT
https://bugzilla.redhat.com/2500565 REPORT
https://bugzilla.redhat.com/2500577 REPORT
https://bugzilla.redhat.com/2500581 REPORT
https://bugzilla.redhat.com/2500587 REPORT
https://bugzilla.redhat.com/2500593 REPORT
https://errata.almalinux.org/10/ALSA-2026-41895.html ADVISORY
https://www.redhat.com/security/data/cve/CVE-2026… REPORT

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "aspnetcore-runtime-9.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.18-1.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "aspnetcore-runtime-dbg-9.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.18-1.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "aspnetcore-targeting-pack-9.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.18-1.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "dotnet-apphost-pack-9.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "dotnet-hostfxr-9.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
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          "type": "ECOSYSTEM"
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      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
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      },
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        {
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      ]
    },
    {
      "package": {
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      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "dotnet-sdk-9.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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            {
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          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "dotnet-sdk-9.0-source-built-artifacts"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
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          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "dotnet-sdk-aot-9.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "dotnet-sdk-dbg-9.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.119-1.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "dotnet-targeting-pack-9.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "dotnet-templates-9.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.119-1.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "netstandard-targeting-pack-2.1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.0.119-1.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": ".NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.  \n\nNew versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.119 and .NET Runtime 9.0.18.  \n\nSecurity Fix(es):  \n\n  * dotnet: SocketsHttpHandler Http2Connection - HTTP/2 SETTINGS/PING ACK flood causing OOM (CVE-2026-50651)\n  * dotnet: .NET Core: Denial of Service via type confusion (CVE-2026-57108)\n  * ASP.NET Core: ASP.NET Core: Denial of Service via uncontrolled resource allocation (CVE-2026-56170)\n  * ASP.NET Core: ASP.NET Core: Privilege Escalation via Incorrect Authentication Algorithm (CVE-2026-47300)\n  * ASP.NET Core: ASP.NET Core: Privilege Elevation via Authentication Bypass (CVE-2026-47303)\n  * dotnet: .NET Security Feature Bypass Vulnerability (CVE-2026-47304)\n  * dotnet: .NET: Denial of Service vulnerability due to uncontrolled resource allocation (CVE-2026-47302)\n  * dotnet: .NET Framework: Privilege escalation via code injection (CVE-2026-50650)\n  * dotnet: .NET: Security feature bypass due to incorrect authorization (CVE-2026-50528)\n  * dotnet: .NET: Local code execution via deserialization of untrusted data (CVE-2026-50649)\n  * dotnet: .NET: Local tampering via improper link resolution (CVE-2026-50526)\n  * dotnet: .NET Framework: Local Code Execution via Protection Mechanism Failure (CVE-2026-50646)\n  * dotnet: .NET Framework: Denial of Service via network-based buffer overflow (CVE-2026-50527)\n  * dotnet: .NET Framework: Remote Denial of Service due to uncontrolled resource allocation (CVE-2026-50648)\n  * .NET: .NET: Network Spoofing Vulnerability (CVE-2026-50659)\n  * dotnet: .NET Framework: Denial of Service via improper input validation (CVE-2026-50524)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * Update .NET 9.0 to SDK 9.0.119 and Runtime 9.0.18 [almalinux-10.2.z] (JIRA:AlmaLinux-192473)\n  * dotnet9.0: Reduce time to detect hanging builds during .NET RPM builds (c10s) [almalinux-10.2.z] (JIRA:AlmaLinux-192330)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:41895",
  "modified": "2026-08-19T21:10:12Z",
  "published": "2026-07-20T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:41895"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-47300"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-47302"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-47303"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-47304"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50524"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50526"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50527"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50528"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50646"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50648"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50649"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50650"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50651"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-50659"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-56170"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-57108"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2499217"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500109"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500189"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500492"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500502"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500509"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500515"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500556"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500562"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500563"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500565"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500577"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500581"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500587"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2500593"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-41895.html"
    },
    {
      "type": "REPORT",
      "url": "https://www.redhat.com/security/data/cve/CVE-2026-50525.html"
    }
  ],
  "related": [
    "CVE-2026-50651",
    "CVE-2026-57108",
    "CVE-2026-56170",
    "CVE-2026-47300",
    "CVE-2026-47303",
    "CVE-2026-47304",
    "CVE-2026-47302",
    "CVE-2026-50650",
    "CVE-2026-50528",
    "CVE-2026-50649",
    "CVE-2026-50526",
    "CVE-2026-50646",
    "CVE-2026-50527",
    "CVE-2026-50648",
    "CVE-2026-50659",
    "CVE-2026-50524"
  ],
  "summary": "Important: .NET 9.0 security, bug fix, and enhancement update"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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