CVE-2026-32226
published 2026-04-14CVE-2026-32226: Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service…
PriorityP434medium5.9CVSS 3.1
AVNACHPRNUINSUCNINAH
EPSS
0.54%
42.0th percentile
Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a network.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_net_framework_3.5 | >= 3.5.0 < 2.0.50727.8982 & 3.0.30729.8976 | 2.0.50727.8982 & 3.0.30729.8976 |
| microsoft | microsoft_net_framework_3.5_and_4.7.2 | >= 4.7.0 < 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 | 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 |
| microsoft | microsoft_net_framework_3.5_and_4.8 | >= 4.8.0 < 2.0.50727.9068 & 3.0.30729.9065 & 4.8.4801.0 | 2.0.50727.9068 & 3.0.30729.9065 & 4.8.4801.0 |
| microsoft | microsoft_net_framework_3.5_and_4.8.1 | >= 4.8.1 < 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 | 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 |
| microsoft | microsoft_net_framework_4.6.2_4.7_4.7.1_4.7.2 | >= 4.7.0 < 4.8.4801.0 | 4.8.4801.0 |
| microsoft | microsoft_net_framework_4.7.2 | >= 10.0.0.0 < 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 | 2.0.50727.9068 & 3.0.30729.9065 & 4.7.4141.0 |
| microsoft | microsoft_net_framework_4.8 | >= 4.8.0 < 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 | 2.0.50727.9181 & 3.0.30729.9165 & 4.8.4801.0 |
| microsoft | microsoft_net_framework_4.8.1 | >= 4.8.0.0 < 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 | 2.0.50727.9181 & 3.0.30729.9165 & 4.8.9332.0 |
| microsoft | net_framework | — | — |
| microsoft | net_framework | — | — |
| microsoft | net_framework | — | — |
| microsoft | net_framework | — | — |
CVSS provenance
nvdv3.15.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_redhat5.9MEDIUM
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VulDB
Microsoft .NET Framework prior 4.8.9332.0 race condition
vuldb·2026-04-14·CVSS 5.9
CVE-2026-32226 [MEDIUM] Microsoft .NET Framework prior 4.8.9332.0 race condition
A vulnerability marked as problematic has been reported in Microsoft .NET Framework. The impacted element is an unknown function. This manipulation causes race condition.
The identification of this vulnerability is CVE-2026-32226. It is possible to initiate the attack remotely. There is no exploit available.
It is suggested to upgrade the affected component.
GHSA
GHSA-fpfg-hmcm-qvcj: Concurrent execution using shared resource with improper synchronization ('race condition') in
ghsa_unreviewed·2026-04-14
CVE-2026-32226 [MEDIUM] CWE-362 GHSA-fpfg-hmcm-qvcj: Concurrent execution using shared resource with improper synchronization ('race condition') in
Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a network.
Red Hat
dotnet: .NET Framework: Denial of Service via race condition
vendor_redhat·2026-04-14·CVSS 5.9
CVE-2026-32226 [MEDIUM] CWE-821 dotnet: .NET Framework: Denial of Service via race condition
dotnet: .NET Framework: Denial of Service via race condition
A flaw was found in .NET Framework. This vulnerability, a race condition, allows an unauthorized attacker to exploit improper synchronization when shared resources are concurrently executed. This can lead to a Denial of Service (DoS) over a network, making the affected system or application unavailable to legitimate users.
Statement: This Moderate impact flaw in .NET Framework allows an unauthorized attacker to cause a Denial of Service over a network. The vulnerability arises from a race condition due to improper synchronization when shared resources are concurrently executed. This affects Red Hat Enterprise Linux and Fedora systems utilizing .NET Framework.
Mitigation: Mitigation for this issue is either not available or the
No detection rules found.
No public exploits indexed.
Bleepingcomputer
Microsoft April 2026 Patch Tuesday fixes 167 flaws, 2 zero-days
blogs_bleepingcomputer·2026-04-14·CVSS 6.5
[MEDIUM] Microsoft April 2026 Patch Tuesday fixes 167 flaws, 2 zero-days
## Microsoft April 2026 Patch Tuesday fixes 167 flaws, 2 zero-days
## Lawrence Abrams
Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.
This Patch Tuesday also addresses eight "Critical" vulnerabilities, 7 of which are remote code execution flaws and the other is a denial of service flaw.
The number of bugs in each vulnerability category is listed below:
93 Elevation of Privilege Vulnerabilities
13 Security Feature Bypass Vulnerabilities
20 Remote Code Execution Vulnerabilities
21 Information Disclosure Vulnerabilities
10 Denial of Service Vulnerabilities
9 Spoofing Vulnerabilities
When BleepingComputer reports on Patch Tuesday security updates, we only count those released by Microsoft today.
Therefore, the
Sans Isc
Microsoft Patch Tuesday April 2026., (Tue, Apr 14th)
blogs_sans_isc·2026-04-14·CVSS 8.8
[HIGH] Microsoft Patch Tuesday April 2026., (Tue, Apr 14th)
Microsoft Patch Tuesday April 2026.
Published: 2026-04-14. Last Updated: 2026-04-14 17:46:09 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
This month's Microsoft Patch Tuesday looks like a record one, but let's look at it a bit closer to understand what is happening
The update patches a total of 243 vulnerabilities. However, 78 of them are Chromium issues affecting Microsoft Edge. Patches for Edge were released earlier. This leaves 165 vulnerabilities that are not Edge-related. Of these, 8 are rated critical, and 154 are important. One vulnerability has already been exploited, and another was made public before today but has not yet been seen in the wild.
Noteworthy Vulnerabilities:
CVE-2026-33827 (Windows TCP/IP Remote Code Execution Vulnerability): As a packet nerd, I love thes
Rapid7
Patch Tuesday - April 2026
blogs_rapid7·2026-04-14·CVSS 6.5
[MEDIUM] Patch Tuesday - April 2026
Microsoft is publishing 167 vulnerabilities on April 2026 Patch Tuesday . Microsoft is aware of exploitation in the wild for one of today’s vulnerabilities, and public disclosure for one other. Microsoft evaluates 19 of the vulnerabilities published today as more likely to see future exploitation. So far this month, Microsoft has provided patches to address 80 browser vulnerabilities, which are not included in the Patch Tuesday count above.
## Increasing volumes of vulnerabilities
Regular Patch Tuesday watchers will know that these vulnerability totals are significantly higher than usual, especially the browser numbers. Late last week, Microsoft published patches to resolve more than 60 browser vulnerabilities in a single day, which is a new record in that very specific category.
It mig
Bugzilla
CVE-2026-32226 dotnet9.0: .NET Framework: Denial of Service via race condition [fedora-all]
bugzilla·2026-04-14·CVSS 5.9
CVE-2026-32226 [MEDIUM] CVE-2026-32226 dotnet9.0: .NET Framework: Denial of Service via race condition [fedora-all]
CVE-2026-32226 dotnet9.0: .NET Framework: Denial of Service via race condition [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.
Bugzilla
CVE-2026-32226 dotnet: .NET Framework: Denial of Service via race condition
bugzilla·2026-04-14·CVSS 5.9
CVE-2026-32226 [MEDIUM] CVE-2026-32226 dotnet: .NET Framework: Denial of Service via race condition
CVE-2026-32226 dotnet: .NET Framework: Denial of Service via race condition
Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a network.
Bugzilla
CVE-2026-32226 dotnet8.0: .NET Framework: Denial of Service via race condition [fedora-all]
bugzilla·2026-04-14·CVSS 5.9
CVE-2026-32226 [MEDIUM] CVE-2026-32226 dotnet8.0: .NET Framework: Denial of Service via race condition [fedora-all]
CVE-2026-32226 dotnet8.0: .NET Framework: Denial of Service via race condition [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.
Bugzilla
CVE-2026-32226 dotnet10.0: .NET Framework: Denial of Service via race condition [fedora-all]
bugzilla·2026-04-14·CVSS 5.9
CVE-2026-32226 [MEDIUM] CVE-2026-32226 dotnet10.0: .NET Framework: Denial of Service via race condition [fedora-all]
CVE-2026-32226 dotnet10.0: .NET Framework: Denial of Service via race condition [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.
2026-04-14
Published