RHSA-2026:98998
Vulnerability from csaf_redhat - Published: 2026-11-11 14:10 - Updated: 2026-11-13 21:59Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Critical
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
httpd:
* httpd-2.4.71-0.1.hum1 (aarch64, s390x, x86_64)
* httpd-core-2.4.71-0.1.hum1 (aarch64, s390x, x86_64)
* httpd-devel-2.4.71-0.1.hum1 (aarch64, s390x, x86_64)
* httpd-filesystem-2.4.71-0.1.hum1 (noarch)
* httpd-manual-2.4.71-0.1.hum1 (noarch)
* httpd-tools-2.4.71-0.1.hum1 (aarch64, s390x, x86_64)
* mod_ldap-2.4.71-0.1.hum1 (aarch64, s390x, x86_64)
* mod_lua-2.4.71-0.1.hum1 (aarch64, s390x, x86_64)
* mod_proxy_html-1:2.4.71-0.1.hum1 (aarch64, s390x, x86_64)
* mod_session-2.4.71-0.1.hum1 (aarch64, s390x, x86_64)
* mod_ssl-1:2.4.71-0.1.hum1 (aarch64, s390x, x86_64)
* httpd-2.4.71-0.1.hum1.src (src)
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.
A flaw was found in Apache HTTP Server's mod_vhost_alias module. A remote attacker could trigger a stack-based buffer overflow by sending a specially crafted HTTP request. This issue leads to a one-byte memory overwrite on the stack, which can crash the server process and result in a Denial of Service (DoS).
5.9 (Medium)
Affected products
Fixed
34 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:httpd-0:2.4.71-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-0:2.4.71-0.1.hum1@s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-0:2.4.71-0.1.hum1@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-0:2.4.71-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-core-0:2.4.71-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-core-0:2.4.71-0.1.hum1@s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-core-0:2.4.71-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-devel-0:2.4.71-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-devel-0:2.4.71-0.1.hum1@s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-devel-0:2.4.71-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-filesystem-0:2.4.71-0.1.hum1@noarch@public-hummingbird-aarch64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-filesystem-0:2.4.71-0.1.hum1@noarch@public-hummingbird-s390x-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-filesystem-0:2.4.71-0.1.hum1@noarch@public-hummingbird-x86_64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-manual-0:2.4.71-0.1.hum1@noarch@public-hummingbird-aarch64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-manual-0:2.4.71-0.1.hum1@noarch@public-hummingbird-s390x-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-manual-0:2.4.71-0.1.hum1@noarch@public-hummingbird-x86_64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-tools-0:2.4.71-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-tools-0:2.4.71-0.1.hum1@s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:httpd-tools-0:2.4.71-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_ldap-0:2.4.71-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_ldap-0:2.4.71-0.1.hum1@s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_ldap-0:2.4.71-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_lua-0:2.4.71-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_lua-0:2.4.71-0.1.hum1@s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_lua-0:2.4.71-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_proxy_html-1:2.4.71-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_proxy_html-1:2.4.71-0.1.hum1@s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_proxy_html-1:2.4.71-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_session-0:2.4.71-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_session-0:2.4.71-0.1.hum1@s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_session-0:2.4.71-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_ssl-1:2.4.71-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_ssl-1:2.4.71-0.1.hum1@s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:mod_ssl-1:2.4.71-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in the mod_http2 module of the Apache HTTP Server (httpd), the standard web server used across Red Hat Enterprise Linux and other products. HTTP/2 allows a client to send many requests at the same time over a single connection, and the module handles these concurrent requests using multiple threads. Due to a thread-safety flaw, one thread can modify memory that belongs to another thread, corrupting the server's internal memory. A remote attacker who can reach the web server could exploit this flaw to execute arbitrary commands on the server without any authentication, potentially leading to a complete takeover of the affected system, unauthorized access to sensitive data, and service disruption. Only servers that have HTTP/2 enabled are affected; servers configured to serve only HTTP/1.1 are not vulnerable.
9.8 (Critical)
Affected products
Fixed
34 products, the same list as for
CVE-2026-109163
Threats
Impact
Critical
References
17 references
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"title": "Statement"
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{
"category": "other",
"text": "The Red Hat Product Security team has assessed the severity of this vulnerability as Critical. It allows unauthenticated remote code execution, and public research has demonstrated a reliable exploit against a default-configured server with the mod_http2 module enabled. Successful exploitation allows an attacker to execute arbitrary commands, gain full control of the server process, and access or modify sensitive information.\n\nThe vulnerability\u0027s root cause is a thread-safety flaw in the mod_http2 module\u0027s handling of concurrent HTTP/2 requests: a worker thread writes into memory owned by the connection thread through a shared, lock-free allocator. This issue affects servers with HTTP/2 (h2 or h2c) enabled via the Protocols directive; servers serving only HTTP/1.1 are not affected.\n\nBecause exploitation depends on HTTP/2 stream workers sharing an allocator with the connection, the severity of this flaw varies across Red Hat products. The mod_http2 packages shipped in Red Hat Enterprise Linux 9 and Red Hat Enterprise Linux 10 allocate each HTTP/2 stream from a separate allocator, which substantially increases the complexity of exploiting the flaw. The severity for Red Hat Enterprise Linux 9 and Red Hat Enterprise Linux 10 is therefore rated Important rather than Critical. Versions of mod_http2 prior to 2.0.8 do not contain the affected code, and Red Hat Enterprise Linux 8 and earlier are not affected. Refer to the affected packages table for the severity assigned to each Red Hat product.",
"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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]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-119618"
},
{
"category": "external",
"summary": "RHBZ#2567318",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567318"
},
{
"category": "external",
"summary": "RHSB-2026-017",
"url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-017"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-119618",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-119618"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-119618",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119618"
}
],
"release_date": "2026-11-11T12:52:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-11-11T14:10:53+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:98998"
},
{
"category": "workaround",
"details": "See the security bulletin for a detailed mitigation procedure.",
"product_ids": [
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
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}
],
"threats": [
{
"category": "impact",
"details": "Critical"
}
],
"title": "httpd:2.4/mod_http2: mod_http2: httpd: Remote code execution in mod_http2"
}
]
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.