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CVE-2023-45802

Apache HTTP Server: HTTP/2 stream memory not reclaimed right away on RST

No known exploitation. EPSS puts it in the 88th percentile. A vendor fix is available.

CVSS 3.15.9MediumEPSS percentile88th3.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFixVendor fixNo build named by the sources
Check it yourself

OpenVAS · 58 checks

e.g. OID 1.3.6.1.4.1.25623.1.0.100310

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Published Updated Sources: CVE.org, NVD, BDU, CSAF

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

  • Apache Software Foundation Apache HTTP ServerAffected: ≥ 2.4.17, ≤ 2.4.57Upgrade to: after 2.4.57Stated by: CVE record
  • Red Hat Inc. Red Hat Enterprise LinuxAffected: 7Upgrade to: not statedStated by: BDU
  • ООО «РусБИТех-Астра» Astra Linux Special EditionAffected: 1.6 «Смоленск»Upgrade to: not statedStated by: BDU
  • Сообщество свободного программного обеспечения Debian GNU/LinuxAffected: 10Upgrade to: not statedStated by: BDU
  • Red Hat Inc. JBoss Enterprise Application PlatformAffected: 6Upgrade to: not statedStated by: BDU

Versions as the sources state them. 4 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

Hitachi Energy is aware of the multiple vulnerabilities related to open-source Apache Tomcat components that affect the Service Suite product versions listed in this document. An attacker successfully exploiting these vulnerabilities can cause confidentiality, integrity and availability impacts. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS88th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

3.2% chance of exploitation activity in the next 30 days, which ranks it in the 88th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

5 events over 976 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. Patch availablerecord updated
  3. Publishedweakness classified

Affected products

And 6 more affected products. See all after sign-in

Scale

How widely the affected products are used. This is not a count of vulnerable hosts.

Estimate Public sources, each figure dated. How much of it is already patched is not known.

Apache HTTP Server

Web

  • 21%of websites

    Among websites whose web server we know.

    W3Techs ↗ · as of 2 Nov 2026 · Medium confidence

Version split · W3Techs · as of 2 Nov 2026

  • 2.495%
  • 2.25.1%
  • 1<1%
  • 2.0<1%

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Scored 5.9 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality NoneNo confidentiality impact
  • Integrity NoneNo integrity impact
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

Sources

References in the record

And 25 more references. See all after sign-in

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