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CVE-2024-21386VulnerabilityPublished Updated

Red Hat Security Advisory: .NET 8.0 security update

Affects Red HatSource GCVE Database

0

Mentioned vulnerabilities

Not known to be exploited.

Data as of 26 Oct 2026, 07:57 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 15 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 2026-10-26.

What to do

AI-suggested

Red Hat has released official updates to .NET SDK (8.0.102) and .NET Runtime (8.0.2) that address these denial of service vulnerabilities. Users should apply these updates as provided by Red Hat for their respective Red Hat Enterprise Linux 8 systems and related products. Refer to Red Hat advisory RHSA-2024:0827 and https://access.redhat.com/articles/11258 for detailed update instructions. No additional mitigation is indicated beyond applying the official patches.

Description

.NET 8.0 for Red Hat Enterprise Linux has security vulnerabilities that allow denial of service attacks in the SignalR server component and the X509Certificate2 class. Red Hat has released updated versions .NET SDK 8.0.102 and .NET Runtime 8.0.2 to address these issues. The vulnerabilities are identified as CVE-2024-21386 and CVE-2024-21404. These issues affect multiple Red Hat Enterprise Linux 8 variants and related products. The update is rated as Important by Red Hat Product Security.

References

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