VDB
RHSA-2021%3A3856
RHSA-2021%3A3856
PUBLISHED
CVSS 9 CRITICAL
Red Hat Security Advisory: httpd security update
Risk Scores
CVSS 3.1
9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat:rhel_aus:7.3::server | mod_session | 0, 0 |
| Red Hat:enterprise_linux:7::server | mod_session | 0, 0 |
| Red Hat:rhel_tus:7.7::server | httpd-tools | 0, 0 |
| Red Hat:rhel_aus:7.2::server | httpd-devel | 0, 0 |
| Red Hat:rhel_aus:7.2::server | mod_session | 0, 0 |
| Red Hat:enterprise_linux:7::computenode | mod_session | 0, 0 |
| Red Hat:enterprise_linux:7::workstation | httpd-tools | 0, 0 |
| Red Hat:rhel_e4s:7.6::server | httpd | 0, 0 |
| Red Hat:rhel_e4s:7.6::server | httpd-manual | 0, 0 |
| Red Hat:rhel_aus:7.2::server | httpd | 0, 0 |
| Red Hat:rhel_aus:7.3::server | mod_ssl | 0, 0 |
| Red Hat:rhel_aus:7.3::server | httpd-devel | 0, 0 |
| Red Hat:rhel_aus:7.4::server | mod_proxy_html | 0, 0 |
| Red Hat:rhel_aus:7.2::server | mod_ssl | 0, 0 |
| Red Hat:rhel_tus:7.6::server | mod_ssl | 0, 0 |
| Red Hat:enterprise_linux:7::computenode | mod_ssl | 0, 0 |
| Red Hat:rhel_tus:7.7::server | mod_ssl | 0, 0 |
| Red Hat:rhel_tus:7.6::server | httpd-devel | 0, 0 |
| Red Hat:enterprise_linux:7::client | httpd-manual | 0, 0 |
| Red Hat:enterprise_linux:7::workstation | httpd | 0, 0 |
…and 97 more
Timeline
- Oct 14, 2021 CVE Published
- Nov 21, 2025 CVE Updated
- May 1, 2026 Distribution Patch
- May 1, 2026 Distribution Patch
- May 1, 2026 Security Advisory
- May 1, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2021:3856 advisory
- https://access.redhat.com/security/updates/classification/#important article
- https://bugzilla.redhat.com/show_bug.cgi?id=2005117 report
- https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_3856.json advisory
- https://access.redhat.com/security/cve/CVE-2021-40438 report
- https://www.cve.org/CVERecord?id=CVE-2021-40438 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2021-40438 advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog article