CVE-2024-27316: Apache HTTP Server: HTTP/2 DoS by memory exhaustion on endless continuation frames

Modified

AliasesALPINE-CVE-2024-27316RHSA-2024:1786RHSA-2024:1872+7 more

Published 04-04-2024Last modified 04-11-2025

Vulnerability summary

CVE-2024-27316 is a high (CVSS 7.5) vulnerability in apache software foundation apache http server. EPSS estimates a 91.33% chance of exploitation in the next 30 days, higher than 99.8% of scored vulnerabilities.

Priority

Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 91% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?

CVSS score

7.5/10

010

High · v3.1 (CVE.org)

EPSS score

91.33%

0%100%

Critical · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 8

DLA-3818-1 DSA-5662-1 MGASA-2024-0118 RHSA-2024:2693 RHSA-2024:2891 RHSA-2024:5143+12 more

Timeline

04-04-2024
PublishedVulnerability first disclosed.
04-11-2025
Last modifiedVulnerability information updated.

Description

HTTP/2 incoming headers exceeding the limit are temporarily buffered in nghttp2 in order to generate an informative HTTP 413 response. If a client does not stop sending headers, this leads to memory exhaustion.

CVSS metrics

6 scores · 6 sources · 1 version

v3.17.5

EPSS trend

Probability

91.33%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

No change 0.00 pp

From 91.33% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-770Allocation of Resources Without Limits or ThrottlingThe product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat33 products

eap8-hibernate< 0:6.2.26-1.Final_redhat_00001.1.el8eap | < 0:6.2.26-1.Final_redhat_00001.1.el9eap
eap8-hibernate-core< 0:6.2.26-1.Final_redhat_00001.1.el8eap | < 0:6.2.26-1.Final_redhat_00001.1.el9eap
eap8-hibernate-envers< 0:6.2.26-1.Final_redhat_00001.1.el8eap | < 0:6.2.26-1.Final_redhat_00001.1.el9eap
eap8-jboss-remoting< 0:5.0.29-1.Final_redhat_00001.1.el8eap | < 0:5.0.29-1.Final_redhat_00001.1.el9eap
eap8-jboss-xnio-base< 0:3.8.16-1.Final_redhat_00001.1.el8eap | < 0:3.8.16-1.Final_redhat_00001.1.el9eap

eap8-jose4j< 0:0.9.6-1.redhat_00001.1.el8eap | < 0:0.9.6-1.redhat_00001.1.el9eap
eap8-undertow< 0:2.3.14-1.SP1_redhat_00001.1.el8eap | < 0:2.3.14-1.SP1_redhat_00001.1.el9eap
eap8-wildfly< 0:8.0.2-5.GA_redhat_00012.1.el8eap | < 0:8.0.2-5.GA_redhat_00012.1.el9eap
eap8-wildfly-java-jdk11< 0:8.0.2-5.GA_redhat_00012.1.el8eap | < 0:8.0.2-5.GA_redhat_00012.1.el9eap
eap8-wildfly-java-jdk17< 0:8.0.2-5.GA_redhat_00012.1.el8eap | < 0:8.0.2-5.GA_redhat_00012.1.el9eap
eap8-wildfly-modules< 0:8.0.2-5.GA_redhat_00012.1.el8eap | < 0:8.0.2-5.GA_redhat_00012.1.el9eap
httpd< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
httpd-debuginfo< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
httpd-debugsource< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
httpd-devel< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
httpd-filesystem< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
httpd-manual< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
httpd-tools< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
httpd-tools-debuginfo< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
mod_http2< 0:1.15.7-8.module+el8.9.0+21652+2dd1200b.5 | < 0:1.15.19-5.el9_3.1 | < 0:2.0.26-2.el9_4 | < 0:1.15.7-5.module+el8.6.0+21746+f601aac0.3 | < 0:1.15.19-4.el9_2.6 | < 0:1.15.19-3.el9_0.6
mod_http2-debuginfo< 0:1.15.7-8.module+el8.9.0+21652+2dd1200b.5 | < 0:1.15.19-5.el9_3.1 | < 0:2.0.26-2.el9_4 | < 0:1.15.7-5.module+el8.6.0+21746+f601aac0.3 | < 0:1.15.19-4.el9_2.6 | < 0:1.15.19-3.el9_0.6
mod_http2-debugsource< 0:1.15.7-8.module+el8.9.0+21652+2dd1200b.5 | < 0:1.15.19-5.el9_3.1 | < 0:2.0.26-2.el9_4 | < 0:1.15.7-5.module+el8.6.0+21746+f601aac0.3 | < 0:1.15.19-4.el9_2.6 | < 0:1.15.19-3.el9_0.6
mod_ldap< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
mod_ldap-debuginfo< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
mod_md< 1:2.0.8-8.module+el8.9.0+19080+567b90f8 | < 1:2.0.8-8.module+el8.3.0+6814+67d1e611
mod_md-debuginfo< 1:2.0.8-8.module+el8.9.0+19080+567b90f8 | < 1:2.0.8-8.module+el8.3.0+6814+67d1e611
mod_md-debugsource< 1:2.0.8-8.module+el8.9.0+19080+567b90f8 | < 1:2.0.8-8.module+el8.3.0+6814+67d1e611
mod_proxy_html< 1:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 1:2.4.37-47.module+el8.6.0+19809+6e655c60.7
mod_proxy_html-debuginfo< 1:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 1:2.4.37-47.module+el8.6.0+19809+6e655c60.7
mod_session< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
mod_session-debuginfo< 0:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 0:2.4.37-47.module+el8.6.0+19809+6e655c60.7
mod_ssl< 1:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 1:2.4.37-47.module+el8.6.0+19809+6e655c60.7
mod_ssl-debuginfo< 1:2.4.37-62.module+el8.9.0+19699+7a7a2044 | < 1:2.4.37-47.module+el8.6.0+19809+6e655c60.7

Show all 33

Alpine1 product

apache2< 2.4.59-r0

Apache1 product

http_server≥ 2.4.17, < 2.4.59

Apache software foundation1 product

apache http server≥ 2.4.17, ≤ 2.4.58

Debian1 product

apache2< 2.4.59-1~deb12u1 | < 2.4.59-1

Fedoraproject1 product

fedoraEOL38 | 39 | 40

Netapp1 product

ontap9

Ubuntu1 product

apache2< 2.4.18-2ubuntu3.17+esm12 | < 2.4.29-1ubuntu4.27+esm2 | < 2.4.41-4ubuntu3.17 | < 2.4.52-1ubuntu4.9 | < 2.4.58-1ubuntu8.1

8 vendors · 40 products

References

39 links

httpd.apache.org/security/vulnerabilities_24.htmlVendor AdvisoryARTICLEREPORTProductRelease Notes
www.openwall.com/lists/oss-security/2024/04/03/16
www.openwall.com/lists/oss-security/2024/04/04/4Mailing List
support.apple.com/kb/HT214119
seclists.org/fulldisclosure/2024/Jul/18
lists.debian.org/debian-lts-announce/2024/05/msg00013.html
lists.fedoraproject.org/archives/…
security.netapp.com/advisory/ntap-20240415-0013/
www.kb.cert.org/vuls/id/421644Advisory
lists.fedoraproject.org/archives/…

Show all 39 references

security.alpinelinux.org/vuln/CVE-2024-27316Advisory
access.redhat.com/errata/RHSA-2024:1786Advisory
access.redhat.com/security/updates/classification/ARTICLE
bugzilla.redhat.com/show_bug.cgi?id=2268277REPORT
security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_1786.jsonAdvisory
access.redhat.com/security/cve/CVE-2024-27316REPORT
www.cve.org/CVERecord?id=CVE-2024-27316AdvisoryREPORT
nvd.nist.gov/vuln/detail/CVE-2024-27316AdvisoryOval
nowotarski.info/http2-continuation-flood/ARTICLE
access.redhat.com/errata/RHSA-2024:1872Advisory
security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_1872.jsonAdvisory
access.redhat.com/errata/RHSA-2024:2564Advisory
access.redhat.com/security/updates/classification/ARTICLE
security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_2564.jsonAdvisory
access.redhat.com/errata/RHSA-2024:2907Advisory
security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_2907.jsonAdvisory
access.redhat.com/errata/RHSA-2024:3402Advisory
security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_3402.jsonAdvisory
access.redhat.com/errata/RHSA-2024:3417Advisory
security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_3417.jsonAdvisory
access.redhat.com/errata/RHSA-2024:4390Advisory
access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/8.0/ARTICLE
security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_4390.jsonAdvisory
ubuntu.com/security/CVE-2024-27316REPORT
kb.cert.org/vuls/id/421644REPORT
ubuntu.com/security/notices/USN-6729-1Advisory
ubuntu.com/security/notices/USN-6729-2Advisory
ubuntu.com/security/notices/USN-6729-3Advisory
security-tracker.debian.org/tracker/CVE-2024-27316Advisory