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VulnerabilityPublished Updated

CVE-2026-106023: Apache2 · mod_md NULL pointer dereference leads to child process crash

Affects apache2Source GCVE Database

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Authoritative record:CVE-2026-106023· Medium

Not known to be exploited · fixed in 2.4.41-4ubuntu3.23+esm11 : update apache2 when convenient.

Data as of 13 Nov 2026, 14:17 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 2.4.41-4ubuntu3.23+esm11, 2.4.52-1ubuntu4.27, 2.4.58-1ubuntu8.19 +2

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 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 13 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Ubuntu 26.10apache2pkg:deb/ubuntu/apache2?arch=source&distro=stonkingOther threatsAffected
  • <2.4.68-1ubuntu6.2
Fixed in
  • 2.4.68-1ubuntu6.2
Ubuntu 26.04 LTSapache2pkg:deb/ubuntu/apache2?arch=source&distro=resoluteOther threatsAffected
  • <2.4.66-2ubuntu2.8
Fixed in
  • 2.4.66-2ubuntu2.8
Ubuntu 24.04 LTSapache2pkg:deb/ubuntu/apache2?arch=source&distro=nobleOther threatsAffected
  • <2.4.58-1ubuntu8.19
Fixed in
  • 2.4.58-1ubuntu8.19
Ubuntu 22.04 LTSapache2pkg:deb/ubuntu/apache2?arch=source&distro=jammyOther threatsAffected
  • <2.4.52-1ubuntu4.27
Fixed in
  • 2.4.52-1ubuntu4.27
Ubuntu Pro 20.04 LTSapache2pkg:deb/ubuntu/apache2?arch=source&distro=esm-infra/focalOther threatsAffected
  • <2.4.41-4ubuntu3.23+esm11
Fixed in
  • 2.4.41-4ubuntu3.23+esm11

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

AI-suggested

A patch is available and should be applied by updating the apache2 packages to the fixed versions listed in the Ubuntu security advisory USN-9090-1. Standard system updates or Ubuntu Pro can be used to obtain these fixes. No additional mitigation actions are required beyond applying the official updates.

Description

A NULL pointer dereference vulnerability exists in the Apache HTTP Server's mod_md module. This flaw can cause the child process of the server to crash, resulting in a denial of service. The issue affects multiple Ubuntu releases and specific apache2 package versions. Fixes have been released and are available through standard system updates or Ubuntu Pro.

References

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