Description
Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.
Published: 2026-03-10
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Patch Now
AI Analysis

Impact

This vulnerability allows an attacker to trigger an out‑of‑bounds read in the .NET runtime, resulting in a denial of service that can be exercised over a network. The weakness is classified as CWE‑125 and can cause the affected application to crash or become unresponsive, disrupting availability for legitimate users.

Affected Systems

The flaw affects Microsoft .NET 9.0 and 10.0, as well as the Microsoft Bcl.Memory library. Systems running these components on Windows, Linux, macOS, or in cloud environments such as Red Hat Enterprise Linux 8/9/10.1 are potentially vulnerable. Any application that loads the affected .NET framework or library is at risk.

Risk and Exploitability

The CVSS score of 7.5 indicates high severity, but the EPSS score of less than 1% suggests a low probability of being actively exploited. The vulnerability is not listed in the CISA KEV catalog. Based on the description, the likely attack vector is a remote network attacker sending a crafted exploit to the vulnerable .NET component; local privilege is not required.

Generated by OpenCVE AI on April 2, 2026 at 03:40 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Install the Microsoft security update for the vulnerable .NET version as per the MSRC advisory
  • Verify the installed version is the patched one
  • Restart any services that depend on .NET to ensure the update takes effect
  • Monitor application logs for any remaining out‑of‑bounds read errors or crashes

Generated by OpenCVE AI on April 2, 2026 at 03:40 UTC.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Github GHSA Github GHSA GHSA-73j8-2gch-69rq .NET Denial of Service Vulnerability
Ubuntu USN Ubuntu USN USN-8085-1 .NET vulnerabilities
History

Wed, 01 Apr 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Apple
Apple macos
Linux
Linux linux Kernel
Microsoft bcl.memory
Microsoft windows
CPEs cpe:2.3:a:microsoft:bcl.memory:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Apple
Apple macos
Linux
Linux linux Kernel
Microsoft bcl.memory
Microsoft windows

Fri, 13 Mar 2026 00:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:9
cpe:/o:redhat:enterprise_linux:10.1
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 11 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft bcl Memory
Vendors & Products Microsoft bcl Memory

Tue, 10 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 10 Mar 2026 17:30:00 +0000

Type Values Removed Values Added
Description Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.
Title .NET Denial of Service Vulnerability
First Time appeared Microsoft
Microsoft .net
Microsoft bcl Memory
Weaknesses CWE-125
CPEs cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:Bcl_memory:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft .net
Microsoft bcl Memory
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C'}


Subscriptions

Apple Macos
Linux Linux Kernel
Microsoft .net Bcl Memory Bcl.memory Bcl Memory Windows
Redhat Enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-03-27T22:33:01.428Z

Reserved: 2026-02-11T15:52:13.912Z

Link: CVE-2026-26127

cve-icon Vulnrichment

Updated: 2026-03-10T18:01:22.602Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-10T18:18:41.713

Modified: 2026-04-01T20:22:46.643

Link: CVE-2026-26127

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-03-10T17:05:10Z

Links: CVE-2026-26127 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-02T08:00:22Z

Weaknesses