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Vulnerability details: VCID-hj5r-jms3-x3fe
Vulnerability ID VCID-hj5r-jms3-x3fe
Aliases CVE-2021-41524
Summary While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-476 NULL Pointer Dereference
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41524.json
epss 0.07103 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.07103 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.07103 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.07103 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.07103 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.07103 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.07103 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.07103 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
epss 0.07103 https://api.first.org/data/v1/epss?cve=CVE-2021-41524
apache_httpd moderate https://httpd.apache.org/security/json/CVE-2021-41524.json
archlinux High https://security.archlinux.org/AVG-2442
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41524.json
https://api.first.org/data/v1/epss?cve=CVE-2021-41524
2010934 https://bugzilla.redhat.com/show_bug.cgi?id=2010934
AVG-2442 https://security.archlinux.org/AVG-2442
CVE-2021-41524 https://httpd.apache.org/security/json/CVE-2021-41524.json
GLSA-202208-20 https://security.gentoo.org/glsa/202208-20
RHSA-2022:7143 https://access.redhat.com/errata/RHSA-2022:7143
RHSA-2022:7144 https://access.redhat.com/errata/RHSA-2022:7144
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41524.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.91488
EPSS Score 0.07103
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:36:23.201228+00:00 Apache HTTPD Importer Import https://httpd.apache.org/security/json/CVE-2021-41524.json 38.0.0