RHSA-2025:14625
Vulnerability from csaf_redhat - Published: 2025-08-26 13:26 - Updated: 2026-03-19 17:33Summary
Red Hat Security Advisory: mod_http2 security update
Severity
Moderate
Notes
Topic: An update for mod_http2 is now available for Red Hat Enterprise Linux 10.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The mod_h2 Apache httpd module implements the HTTP2 protocol (h2+h2c) on top of libnghttp2 for httpd 2.4 servers.
Security Fix(es):
* httpd: mod_proxy_http2: untrusted input from a client causes an assertion to fail in the Apache mod_proxy_http2 module (CVE-2025-49630)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
An assertion failure flaw was found in Apache httpd. Untrusted clients can send inputs that trigger an assertion failure in the mod_proxy_http2 module, which likely results in an Apache HTTP server crash or denial of service (DoS).
7.5 (High)
Affected products
Fixed
13 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
References
9 references
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"vulnerabilities": [
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"cve": "CVE-2025-49630",
"cwe": {
"id": "CWE-617",
"name": "Reachable Assertion"
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"discovery_date": "2025-06-24T12:39:07.584000+00:00",
"ids": [
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"notes": [
{
"category": "description",
"text": "An assertion failure flaw was found in Apache httpd. Untrusted clients can send inputs that trigger an assertion failure in the mod_proxy_http2 module, which likely results in an Apache HTTP server crash or denial of service (DoS).",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "httpd: mod_proxy_http2: untrusted input from a client causes an assertion to fail in the Apache mod_proxy_http2 module",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "The vulnerability only affects Appache httpd if a reverse proxy is configured for an HTTP/2 backend, with the ProxyPreserveHost set to \\\"on\\\".\n\nThis vulnerability is rated as Moderate because it requires a highly specific and non-default configuration to be exploitable\u2014namely, an Apache HTTP Server acting as a reverse proxy with an HTTP/2 backend and ProxyPreserveHost set to \"on\". The flaw results in an assertion failure in the mod_proxy_http2 module when handling specially crafted inputs from untrusted clients. While this can lead to a denial of service via server crash, the impact is limited to availability, with no risk of remote code execution or data leakage. Additionally, the condition is recoverable through a simple restart, and there is no persistent state corruption.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
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"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.src",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.x86_64",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.x86_64",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-49630"
},
{
"category": "external",
"summary": "RHBZ#2374578",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2374578"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-49630",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-49630"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-49630",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-49630"
},
{
"category": "external",
"summary": "https://httpd.apache.org/security/vulnerabilities_24.html",
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
}
],
"release_date": "2025-07-14T07:22:15.866000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-08-26T13:26:11+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.src",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.x86_64",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.x86_64",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2025:14625"
},
{
"category": "workaround",
"details": "No mitigation is currently available that meets Red Hat Product Security\u2019s standards for usability, deployment, applicability, or stability.",
"product_ids": [
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.src",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.x86_64",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.x86_64",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.src",
"AppStream-10.0.Z:mod_http2-0:2.0.29-2.el10_0.1.x86_64",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-debuginfo-0:2.0.29-2.el10_0.1.x86_64",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.aarch64",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.ppc64le",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.s390x",
"AppStream-10.0.Z:mod_http2-debugsource-0:2.0.29-2.el10_0.1.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "httpd: mod_proxy_http2: untrusted input from a client causes an assertion to fail in the Apache mod_proxy_http2 module"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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