CVE-2026-62909
published 2026-08-11CVE-2026-62909: Uncaught exception in .NET allows an authorized attacker to elevate privileges locally.
PriorityP345high7.8CVSS 3.1
AVLACHPRLUINSCCHIHAH
EPSS
0.29%
20.8th percentile
Uncaught exception in .NET allows an authorized attacker to elevate privileges locally.
Affected
37 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| devspaces | udi-rhel9 | — | — |
| microsoft | microsoft.netcore.app.runtime.linux-arm | >= 10.0.0 < 10.0.11 | 10.0.11 |
| microsoft | microsoft.netcore.app.runtime.linux-arm | >= 8.0.0 < 8.0.30 | 8.0.30 |
| microsoft | microsoft.netcore.app.runtime.linux-arm | >= 9.0.0 < 9.0.19 | 9.0.19 |
| microsoft | microsoft.netcore.app.runtime.linux-arm64 | >= 10.0.0 < 10.0.11 | 10.0.11 |
| microsoft | microsoft.netcore.app.runtime.linux-arm64 | >= 8.0.0 < 8.0.30 | 8.0.30 |
| microsoft | microsoft.netcore.app.runtime.linux-arm64 | >= 9.0.0 < 9.0.19 | 9.0.19 |
| microsoft | microsoft.netcore.app.runtime.linux-musl-arm | >= 10.0.0 < 10.0.11 | 10.0.11 |
| microsoft | microsoft.netcore.app.runtime.linux-musl-arm | >= 8.0.0 < 8.0.30 | 8.0.30 |
| microsoft | microsoft.netcore.app.runtime.linux-musl-arm | >= 9.0.0 < 9.0.19 | 9.0.19 |
| microsoft | microsoft.netcore.app.runtime.linux-musl-arm64 | >= 10.0.0 < 10.0.11 | 10.0.11 |
| microsoft | microsoft.netcore.app.runtime.linux-musl-arm64 | >= 8.0.0 < 8.0.30 | 8.0.30 |
| microsoft | microsoft.netcore.app.runtime.linux-musl-arm64 | >= 9.0.0 < 9.0.19 | 9.0.19 |
| microsoft | microsoft.netcore.app.runtime.linux-musl-x64 | >= 10.0.0 < 10.0.11 | 10.0.11 |
| microsoft | microsoft.netcore.app.runtime.linux-musl-x64 | >= 8.0.0 < 8.0.30 | 8.0.30 |
| microsoft | microsoft.netcore.app.runtime.linux-musl-x64 | >= 9.0.0 < 9.0.19 | 9.0.19 |
| microsoft | microsoft.netcore.app.runtime.linux-x64 | >= 10.0.0 < 10.0.11 | 10.0.11 |
| microsoft | microsoft.netcore.app.runtime.linux-x64 | >= 8.0.0 < 8.0.30 | 8.0.30 |
| microsoft | microsoft.netcore.app.runtime.linux-x64 | >= 9.0.0 < 9.0.19 | 9.0.19 |
| microsoft | microsoft.netcore.app.runtime.osx-arm64 | >= 10.0.0 < 10.0.11 | 10.0.11 |
| microsoft | microsoft.netcore.app.runtime.osx-arm64 | >= 8.0.0 < 8.0.30 | 8.0.30 |
| microsoft | microsoft.netcore.app.runtime.osx-arm64 | >= 9.0.0 < 9.0.19 | 9.0.19 |
| microsoft | microsoft.netcore.app.runtime.osx-x64 | >= 10.0.0 < 10.0.11 | 10.0.11 |
| microsoft | microsoft.netcore.app.runtime.osx-x64 | >= 8.0.0 < 8.0.30 | 8.0.30 |
| microsoft | microsoft.netcore.app.runtime.osx-x64 | >= 9.0.0 < 9.0.19 | 9.0.19 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
ghsa7.8HIGH
vendor_redhat7.8HIGH
vendor_ubuntu5.9MEDIUM
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VulDB
Microsoft .NET/Visual Studio privileges management (WID-SEC-2026-2761 / CNNVD-2026-99249028)
vuldb·2026-08-15·CVSS 7.8
CVE-2026-62909 [HIGH] Microsoft .NET/Visual Studio privileges management (WID-SEC-2026-2761 / CNNVD-2026-99249028)
A vulnerability was found in Microsoft .NET and Visual Studio. It has been declared as problematic. Impacted is an unknown function. Such manipulation leads to improper privilege management.
This vulnerability is documented as CVE-2026-62909. The attack needs to be performed locally. There is not any exploit available.
It is best practice to apply a patch to resolve this issue.
GHSA
Microsoft Security Advisory CVE-2026-62909 – .NET Elevation of Privilege Vulnerability
ghsa·2026-08-11·CVSS 7.8
CVE-2026-62909 [HIGH] CWE-248 Microsoft Security Advisory CVE-2026-62909 – .NET Elevation of Privilege Vulnerability
Microsoft Security Advisory CVE-2026-62909 – .NET Elevation of Privilege Vulnerability
## Executive summary
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET diagnostics IPC. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.
A missing error check in .NET causes an improper ACL to be applied to a shared resource, resulting in local elevation of privilege.
## Announcement
Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/429
## CVSS Details
- **Version:** 3.1
- **Severity:** Medium
- **Score:** 6.7
- **Vector:** `CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C`
- **Weakness:** CWE-252: Unchecked Return Value
## Af
Ubuntu
.NET vulnerabilities
vendor_ubuntu·2026-08-18·CVSS 5.9
CVE-2026-62909 [MEDIUM] .NET vulnerabilities
Title: .NET vulnerabilities
Summary: Several security issues were fixed in .NET.
Miha Zupan discovered that .NET did not properly interpret certain HTTP
requests. An attacker could possibly use this issue to perform request
smuggling and bypass a security feature. (CVE-2026-62899)
Ivan Demchuk discovered that .NET did not properly handle the removal of
sensitive information before storage or transfer. An attacker could possibly
use this issue to disclose sensitive information. (CVE-2026-62900)
Kevin Gosse discovered that .NET did not properly check an input for a loop
condition. An attacker could possibly use this issue to cause a denial of
service. (CVE-2026-62901)
Kevin Gosse discovered that .NET did not properly perform error checking
when securing shared resources used for diagnos
Red Hat
.NET: Diagnostics IPC abstract UDS exposure via long TMPDIR
vendor_redhat·2026-08-11·CVSS 7.8
CVE-2026-62909 [HIGH] CWE-252 .NET: Diagnostics IPC abstract UDS exposure via long TMPDIR
.NET: Diagnostics IPC abstract UDS exposure via long TMPDIR
No description is available for this CVE.
Package: dotnet10.0 (Red Hat Enterprise Linux 10) - Affected
Package: dotnet8.0 (Red Hat Enterprise Linux 10) - Affected
Package: dotnet9.0 (Red Hat Enterprise Linux 10) - Affected
Package: dotnet10.0 (Red Hat Enterprise Linux 8) - Affected
Package: dotnet8.0 (Red Hat Enterprise Linux 8) - Affected
Package: dotnet9.0 (Red Hat Enterprise Linux 8) - Affected
Package: dotnet10.0 (Red Hat Enterprise Linux 9) - Affected
Package: dotnet8.0 (Red Hat Enterprise Linux 9) - Affected
Package: dotnet9.0 (Red Hat Enterprise Linux 9) - Affected
Package: dotnet10.0 (Red Hat Hardened Images) - Fix deferred
Package: dotnet8.0 (Red Hat Hardened Images) - Fix deferred
Package: dotnet9.0 (Red Hat
No detection rules found.
No public exploits indexed.
Rapid7
Patch Tuesday - August 2026
blogs_rapid7·2026-08-11·CVSS 7.2
CVE-2026-68821 [HIGH] Patch Tuesday - August 2026
Microsoft is publishing 421 vulnerabilities on August 2026 Patch Tuesday , including 236 vulnerabilities in Windows. This is lower volume than last month’s record-breaking behemoth, but still one of the largest Patch Tuesday totals ever. There is no reason to suppose that Patch Tuesday will ever return to the lower volumes we saw prior to 2026. Microsoft is aware of exploitation in the wild for one of the vulnerabilities published today, as well as public disclosure for two others, although the Notable CVEs section of the Security Update Guide omits one of these. As usual, browser vulns are not included in the Patch Tuesday count above, but unusually, Microsoft does not appear to have published any desktop browser security patches so far this month.
## Summary charts
## Summary tables
#
Sans Isc
Microsoft Patch Tuesday August 2026, (Tue, Aug 11th)
blogs_sans_isc·2026-08-11·CVSS 7.8
CVE-2026-68820 [HIGH] Microsoft Patch Tuesday August 2026, (Tue, Aug 11th)
Microsoft Patch Tuesday August 2026
Published: 2026-08-11. Last Updated: 2026-08-11 17:54:49 UTC
by Renato Marinho (Version: 1)
0 comment(s)
This month we got patches for 418 vulnerabilities. Of these, 62 are critical, 1 is being exploited in the wild, and 2 were publicly disclosed as zero-days. Notable fixes include Windows privilege escalation, container tampering, and critical QUIC and DNS Server remote code execution bugs.
A few vulnerabilities worth mentioning:
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability (CVE-2026-68820)
This Important-severity elevation of privilege vulnerability is listed by Microsoft as exploited in the wild but not publicly disclosed, and it has a CVSS score of 7.0. The flaw is a use-after-free issue in the Windows Ancil
Bugzilla
CVE-2026-62909 dotnet9.0: .NET Elevation of Privilege Vulnerability [fedora-all]
bugzilla·2026-08-12·CVSS 7.8
CVE-2026-62909 [HIGH] CVE-2026-62909 dotnet9.0: .NET Elevation of Privilege Vulnerability [fedora-all]
CVE-2026-62909 dotnet9.0: .NET Elevation of Privilege Vulnerability [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Diagnostics IPC - Handle truncation error in ipc_transport_get_default_name (abstract UDS exposure via long TMPDIR)
Affects: 8.0, 9.0, 10.0
Bugzilla
CVE-2026-62909 dotnet8.0: .NET Elevation of Privilege Vulnerability [fedora-all]
bugzilla·2026-08-12·CVSS 7.8
CVE-2026-62909 [HIGH] CVE-2026-62909 dotnet8.0: .NET Elevation of Privilege Vulnerability [fedora-all]
CVE-2026-62909 dotnet8.0: .NET Elevation of Privilege Vulnerability [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Diagnostics IPC - Handle truncation error in ipc_transport_get_default_name (abstract UDS exposure via long TMPDIR)
Affects: 8.0, 9.0, 10.0
Bugzilla
CVE-2026-62909 dotnet10.0: .NET Elevation of Privilege Vulnerability [fedora-all]
bugzilla·2026-08-12·CVSS 7.8
CVE-2026-62909 [HIGH] CVE-2026-62909 dotnet10.0: .NET Elevation of Privilege Vulnerability [fedora-all]
CVE-2026-62909 dotnet10.0: .NET Elevation of Privilege Vulnerability [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Diagnostics IPC - Handle truncation error in ipc_transport_get_default_name (abstract UDS exposure via long TMPDIR)
Affects: 8.0, 9.0, 10.0
Bugzilla
CVE-2026-62909 .NET: Diagnostics IPC abstract UDS exposure via long TMPDIR
bugzilla·2026-08-06·CVSS 7.8
CVE-2026-62909 [HIGH] CVE-2026-62909 .NET: Diagnostics IPC abstract UDS exposure via long TMPDIR
CVE-2026-62909 .NET: Diagnostics IPC abstract UDS exposure via long TMPDIR
Diagnostics IPC - Handle truncation error in ipc_transport_get_default_name (abstract UDS exposure via long TMPDIR)
Affects: 8.0, 9.0, 10.0
2026-08-11
Published