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CVE-2024-21386VulnerabilityPublished Updated

Red Hat Security Advisory: dotnet6.0 security update

Affects Red HatSource GCVE Database

0

Mentioned vulnerabilities

Not known to be exploited.

Data as of 25 Oct 2026, 19:02 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
2.4% chance of exploitation in 30 days – higher than 84% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 Feb 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 2026-10-25.

What to do

AI-suggested

Red Hat has released fixed versions of the dotnet6.0 packages (.NET SDK 6.0.127 and .NET Runtime 6.0.27) that address these vulnerabilities. Users should apply these official updates as provided by Red Hat to remediate the issues. For detailed update instructions, refer to Red Hat's advisory and article at https://access.redhat.com/articles/11258. No additional mitigations are specified or required beyond applying the official patches.

Description

Red Hat has released security updates for the dotnet6.0 packages addressing two denial of service vulnerabilities: CVE-2024-21386 affecting the SignalR server and CVE-2024-21404 affecting X509Certificate2. The fixes are included in .NET SDK 6.0.127 and .NET Runtime 6.0.27. These vulnerabilities could allow denial of service conditions but no active exploits are known. The update is rated as Important by Red Hat and applies to Red Hat Enterprise Linux 8 and related variants.

References

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