Skip to main content
CVE-2026-42899VulnerabilityPublished Updated

Red Hat Security Advisory: .NET 10.0 security update

Affects Red Hat .NET 10.0Source GCVE Database

0
Compare
Authoritative record:CVE-2026-42899· High 7.5

Not known to be exploited · CVSS 7.5 High · fixed in Red Hat package updates : patch Red Hat microsoft.net soon.

Data as of 6 Nov 2026, 02:06 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 10.0.8, 8.0.27, 9.0.16
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade .NET to 10.0.8 (10.0) or 8.0.27 (8.0) or 9.0.16 (9.0).

Affected software

ProductAffectedFixed in
Microsoft.NET 10.0Affected
  • >=10.0.0 <10.0.8
Fixed in
  • 10.0.8
Microsoft.NET 8.0Affected
  • >=8.0.0 <8.0.27
Fixed in
  • 8.0.27
Microsoft.NET 9.0Affected
  • >=9.0.0 <9.0.16
Fixed in
  • 9.0.16
NuGetmicrosoft.netpkg:nuget/microsoft.netOther threatsAffected
  • =10.0.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released fixed versions .NET SDK 10.0.108 and .NET Runtime 10.0.8. Users should apply these official updates as detailed in Red Hat advisory RHSA-2026:21295 and the referenced article https://access.redhat.com/articles/11258. Applying these updates will remediate the vulnerability. No additional mitigation steps are indicated or required.

Description

.NET 10.0 on Red Hat Enterprise Linux contains a security vulnerability (CVE-2026-42899) that allows an attacker to cause a denial of service via an infinite loop. Red Hat has released updated versions .NET SDK 10.0.108 and .NET Runtime 10.0.8 to address this issue. The vulnerability is rated as important by Red Hat Product Security. The advisory applies to multiple Red Hat Enterprise Linux 8 variants and CodeReady Linux Builder products. No CVSS score is provided, but the impact is denial of service.

References

Community reviews

Loading reviews…