CVE-2023-45802
MEDIUMEPSS 87th pctlDescription
When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open and causing the memory footprint to keep on growing. On connection close, all resources were reclaimed, but the process might run out of memory before that. This was found by the reporter during testing of CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During "normal" HTTP/2 use, the probability to hit this bug is very low. The kept memory would not become noticeable before the connection closes or times out. Users are recommended to upgrade to version 2.4.58, which fixes the issue.
How to fix
This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploit Intelligence
Elevated risk: more likely to be exploited than 87% of all known CVEs.
References
Related Vulnerabilities
Other CWE-404 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-44267 | Medium | 6.5 | 77% | - | Fix |
| CVE-2018-8120 | High | 7.0 | 73% | KEV + Ransom | - |
| CVE-2018-8210 | High | 7.8 | 25% | - | - |
| CVE-2018-8639 | High | 7.8 | 22% | KEV + Ransom | - |
| CVE-2023-3206 | Medium | 5.3 | 19% | - | - |
| CVE-2018-8450 | High | 8.8 | 16% | - | - |
Common questions
How do I fix CVE-2023-45802?
Published advisories record a fix for 188 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2023-45802 being actively exploited?
Not that we know of. CVE-2023-45802 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 3.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 87% of all scored CVEs.
How severe is CVE-2023-45802?
CVE-2023-45802 has a CVSS v3 base score of 5.9, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2023-45802 affect?
Published advisories record a fix for httpd (Amazon), httpd-core (Amazon), httpd-core-debuginfo (Amazon), httpd-debuginfo (Amazon), and 184 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2023-45802
Markdown
[](https://tridentstack.com/cve/CVE-2023-45802)HTML
<a href="https://tridentstack.com/cve/CVE-2023-45802"><img src="https://tridentstack.com/cve/badge/CVE-2023-45802.svg" alt="CVE-2023-45802"></a>Check your Linux endpoints for this class of vulnerability
TridentStack Control continuously scans Linux endpoints for known vulnerabilities and deploys the fixes from the same console. 200 endpoints free forever, no credit card.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.