RHSA-2026:42145
Vulnerability from csaf_redhat - Published: 2026-07-20 18:31 - Updated: 2026-08-02 19:04A flaw was found in ASP.NET Core. An authorized attacker can exploit an incorrect implementation of the authentication algorithm over a network. This vulnerability allows the attacker to elevate their privileges, potentially gaining unauthorized access to sensitive resources or performing actions beyond their intended permissions.
A flaw was found in .NET where uncontrolled resource allocation can be exploited by an unauthorized attacker over a network. This vulnerability allows the attacker to exhaust available resources, leading to a Denial of Service (DoS) condition. The lack of limits or throttling mechanisms enables an attacker to disrupt the availability of the affected system.
A flaw was found in ASP.NET Core. An authorized attacker can exploit this authentication bypass vulnerability over a network by manipulating assumed-immutable data. This can allow the attacker to elevate their privileges within the system.
A flaw was found in .NET. An unauthorized attacker can exploit this vulnerability over a network due to improper verification of cryptographic signatures. This allows the attacker to bypass a critical security feature, potentially leading to significant compromise of confidentiality, integrity, and availability.
A flaw was found in .NET Framework. This improper validation of input allows an unauthorized attacker to remotely deny service over a network. This vulnerability can lead to a Denial of Service (DoS) condition, making the affected system unavailable to legitimate users.
A flaw was found in .NET where uncontrolled allocation of resources can lead to a Denial of Service (DoS). An unauthorized remote attacker could exploit this vulnerability by continuously requesting resources without limits or throttling, causing the affected system to become unresponsive or crash. This can disrupt the availability of services running on the .NET framework.
A flaw was found in .NET. This vulnerability, stemming from improper link resolution before file access, allows an authorized local attacker to perform tampering. This could lead to unauthorized modification of data or system files.
A flaw was found in .NET Framework. This vulnerability, a stack-based buffer overflow, allows an unauthorized attacker to remotely exploit the system over a network. Successful exploitation can lead to a denial of service (DoS), making the affected system unavailable to legitimate users.
A flaw was found in .NET where incorrect authorization allows an unauthorized attacker to bypass a security feature over a network. This vulnerability enables an attacker to circumvent intended security controls, potentially leading to unauthorized access or actions within the affected system.
A flaw was found in .NET Framework. This protection mechanism failure allows an unauthorized attacker to execute arbitrary code locally. Successful exploitation of this vulnerability can lead to a complete compromise of the affected system.
A flaw was found in .NET Framework. An unauthorized attacker can exploit this vulnerability remotely by causing the system to allocate resources without proper limits or throttling. This uncontrolled resource allocation can lead to a Denial of Service (DoS), making the affected system unresponsive or unavailable to legitimate users.
A flaw was found in .NET. This vulnerability allows an unauthorized attacker to execute code locally by exploiting a deserialization of untrusted data. This means that if an attacker can provide specially crafted data, the .NET application may process it in a way that leads to the execution of malicious code on the system where the application is running.
A flaw was found in .NET Framework. This vulnerability, caused by improper control of code generation, allows an unauthorized attacker to inject malicious code. Successful exploitation can lead to local privilege escalation, enabling the attacker to gain higher access rights on the affected system.
.NET Denial of Service Vulnerability - HTTP/2 SETTINGS/PING ACK flood causing OOM
A flaw was found in .NET. An authorized attacker can exploit this vulnerability by leveraging improper encoding or escaping of output. This allows the attacker to perform spoofing over a network, potentially deceiving users or systems into believing they are interacting with a trusted entity.
A flaw was found in ASP.NET Core. This vulnerability allows an unauthorized remote attacker to cause a Denial of Service (DoS) by allocating resources without proper limits or throttling. This can lead to the affected system becoming unresponsive or unavailable to legitimate users.
A flaw was found in .NET Core. This vulnerability, known as type confusion, allows an unauthorized remote attacker to cause a denial of service (DoS) over a network. By exploiting this flaw, an attacker can make the affected system unavailable to legitimate users.
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{
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"integrityImpact": "HIGH",
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"details": "Important"
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],
"title": "ASP.NET Core: ASP.NET Core: Privilege Elevation via Authentication Bypass"
},
{
"cve": "CVE-2026-47304",
"cwe": {
"id": "CWE-347",
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},
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{
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"text": "2500509"
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},
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"category": "summary",
"text": "dotnet: .NET Security Feature Bypass Vulnerability",
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},
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"title": "CVSS score applicability"
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{
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{
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"integrityImpact": "HIGH",
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"title": "dotnet: .NET Security Feature Bypass Vulnerability"
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},
{
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"title": "CVSS score applicability"
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],
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{
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{
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"ids": [
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},
{
"category": "summary",
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},
{
"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"
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{
"category": "external",
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{
"category": "external",
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"title": "dotnet: .NET: Denial of Service due to uncontrolled resource allocation"
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"name": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)"
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"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.",
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],
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"category": "external",
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{
"category": "external",
"summary": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50526",
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"name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
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"title": "CVSS score applicability"
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"title": "dotnet: .NET Framework: Denial of Service via network-based buffer overflow"
},
{
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"cwe": {
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"name": "Incorrect Behavior Order: Authorization Before Parsing and Canonicalization"
},
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},
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"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"
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"category": "external",
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"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:dotnet8-0-main@aarch64",
"Red Hat Hardened Images:dotnet8-0-main@src",
"Red Hat Hardened Images:dotnet8-0-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": ".NET: .NET: Network Spoofing Vulnerability"
},
{
"cve": "CVE-2026-56170",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-07-14T18:06:54.194809+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2500189"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in ASP.NET Core. This vulnerability allows an unauthorized remote attacker to cause a Denial of Service (DoS) by allocating resources without proper limits or throttling. This can lead to the affected system becoming unresponsive or unavailable to legitimate users.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "ASP.NET Core: ASP.NET Core: Denial of Service via uncontrolled resource allocation",
"title": "Vulnerability summary"
},
{
"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": [
"Red Hat Hardened Images:dotnet8-0-main@aarch64",
"Red Hat Hardened Images:dotnet8-0-main@src",
"Red Hat Hardened Images:dotnet8-0-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-56170"
},
{
"category": "external",
"summary": "RHBZ#2500189",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2500189"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-56170",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-56170"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-56170",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56170"
},
{
"category": "external",
"summary": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56170",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56170"
}
],
"release_date": "2026-07-14T17:05:13.486000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-20T18:31:50+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/",
"product_ids": [
"Red Hat Hardened Images:dotnet8-0-main@aarch64",
"Red Hat Hardened Images:dotnet8-0-main@src",
"Red Hat Hardened Images:dotnet8-0-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:42145"
}
],
"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": [
"Red Hat Hardened Images:dotnet8-0-main@aarch64",
"Red Hat Hardened Images:dotnet8-0-main@src",
"Red Hat Hardened Images:dotnet8-0-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "ASP.NET Core: ASP.NET Core: Denial of Service via uncontrolled resource allocation"
},
{
"cve": "CVE-2026-57108",
"cwe": {
"id": "CWE-843",
"name": "Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)"
},
"discovery_date": "2026-07-14T18:02:49.265651+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2500109"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in .NET Core. This vulnerability, known as type confusion, allows an unauthorized remote attacker to cause a denial of service (DoS) over a network. By exploiting this flaw, an attacker can make the affected system unavailable to legitimate users.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "dotnet: .NET Core: Denial of Service via type confusion",
"title": "Vulnerability summary"
},
{
"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": [
"Red Hat Hardened Images:dotnet8-0-main@aarch64",
"Red Hat Hardened Images:dotnet8-0-main@src",
"Red Hat Hardened Images:dotnet8-0-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-57108"
},
{
"category": "external",
"summary": "RHBZ#2500109",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2500109"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-57108",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-57108"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-57108",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57108"
},
{
"category": "external",
"summary": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57108",
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57108"
}
],
"release_date": "2026-07-14T17:09:39.087000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-07-20T18:31:50+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/",
"product_ids": [
"Red Hat Hardened Images:dotnet8-0-main@aarch64",
"Red Hat Hardened Images:dotnet8-0-main@src",
"Red Hat Hardened Images:dotnet8-0-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:42145"
}
],
"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": [
"Red Hat Hardened Images:dotnet8-0-main@aarch64",
"Red Hat Hardened Images:dotnet8-0-main@src",
"Red Hat Hardened Images:dotnet8-0-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "dotnet: .NET Core: Denial of Service via type confusion"
}
]
}
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.