CVE-2025-53020

high

Published 2026-06-01 · Modified 2026-06-01

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

8.0

Description

RHSA-2026:22140: httpd:2.4 security update (Important)

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Red Hat Errata — Red Hat Inc. · View original ↗ · Open-Errata-API

Description mod_http2: Apache HTTP Server: HTTP/2 DoS by Memory Increase Red Hat statement The attack surface can be reduced by disabling HTTP/2 support in Apache. Follow the guidance in Red Hat KCS article to: - Remove h2 and h2c from the Protocols directive - Disable mod_http2 and mod_proxy_http2 modules (if not required) https://access.redhat.com/node/7056356 CVSS v3: 5.3…

Description

mod_http2: Apache HTTP Server: HTTP/2 DoS by Memory Increase

Red Hat statement

The attack surface can be reduced by disabling HTTP/2 support in Apache. Follow the guidance in Red Hat KCS article to: - Remove h2 and h2c from the Protocols directive - Disable mod_http2 and mod_proxy_http2 modules (if not required) https://access.redhat.com/node/7056356

CVSS v3: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Package state

Product	Package	State
Red Hat Enterprise Linux 10	`mod_http2`	Affected
Red Hat Enterprise Linux 6	`httpd`	Not affected
Red Hat Enterprise Linux 7	`httpd`	Not affected
Red Hat Enterprise Linux 8	`httpd:2.4/mod_http2`	Affected
Red Hat Enterprise Linux 9	`mod_http2`	Affected
Red Hat JBoss Core Services	`jbcs-httpd24-httpd`	Affected

Affected

Vendor	Product	Version
redhat	Red Hat Enterprise Linux 10	`Affected`
redhat	Red Hat Enterprise Linux 6	`Not affected`
redhat	Red Hat Enterprise Linux 7	`Not affected`
redhat	Red Hat Enterprise Linux 8	`Affected`
redhat	Red Hat Enterprise Linux 9	`Affected`
redhat	Red Hat JBoss Core Services	`Affected`

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`2.4.65-1~deb12u1`
debian	bullseye	fixed	`2.4.65-1~deb11u1`
debian	forky	fixed	`2.4.64-1`
debian	sid	fixed	`2.4.64-1`
debian	trixie	fixed	`2.4.64-1`
sles		affected
rhel	8	fixed

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.