RHSA-2026:7634
Vulnerability from csaf_redhat - Published: 2026-04-11 00:15 - Updated: 2026-07-04 07:49A flaw was found in llvm. A local attacker could exploit a stack-based buffer overflow vulnerability in the `llvm::StringMap::insert` function. This manipulation could lead to a denial of service, making the affected system or application unavailable.
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:llvm-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
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| Unresolved product id: Red Hat Hardened Images:llvm-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
A flaw was found in llvm. A local attacker could exploit a heap-based buffer overflow vulnerability in the GCRelocateInst::getBasePtr function within the Bitcode File Handler component. This flaw could lead to a denial of service, making the affected system unavailable.
CWE-805 - Buffer Access with Incorrect Length Value| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:llvm-main@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@src | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@x86_64 | — |
Vendor Fix
fix
|
A flaw was found in urllib3, an HTTP client library for Python. This vulnerability allows a remote attacker to cause excessive resource consumption, such as high CPU usage and massive memory allocation, on the client side. This occurs when urllib3 attempts to decompress an entire HTTP response, even if only a partial read was requested, or when draining the connection after a partial decompression. This can lead to a Denial of Service (DoS) condition.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:llvm-main@aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@src | — |
Vendor Fix
fix
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@x86_64 | — |
Vendor Fix
fix
|
A flaw was found in the brace-expansion library. This vulnerability allows an attacker to cause a Denial of Service (DoS) by providing a large numeric range for expansion. The library allocates excessive memory to generate all intermediate elements before applying the maximum limit, leading to high memory consumption and potential application crashes. This can impact the availability of systems using the library.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:llvm-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:llvm-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
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"url": "https://vuldb.com/vuln/374582/cti"
}
],
"release_date": "2026-06-29T14:15:09.190000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-11T00:15:28+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:llvm-main@aarch64",
"Red Hat Hardened Images:llvm-main@noarch",
"Red Hat Hardened Images:llvm-main@src",
"Red Hat Hardened Images:llvm-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:7634"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 3.3,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:llvm-main@aarch64",
"Red Hat Hardened Images:llvm-main@noarch",
"Red Hat Hardened Images:llvm-main@src",
"Red Hat Hardened Images:llvm-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Low"
}
],
"title": "llvm: llvm-project: LLVM: Denial of service via heap-based buffer overflow in Bitcode File Handler"
},
{
"cve": "CVE-2026-44432",
"cwe": {
"id": "CWE-409",
"name": "Improper Handling of Highly Compressed Data (Data Amplification)"
},
"discovery_date": "2026-05-13T17:01:01.083841+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2477154"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in urllib3, an HTTP client library for Python. This vulnerability allows a remote attacker to cause excessive resource consumption, such as high CPU usage and massive memory allocation, on the client side. This occurs when urllib3 attempts to decompress an entire HTTP response, even if only a partial read was requested, or when draining the connection after a partial decompression. This can lead to a Denial of Service (DoS) condition.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "urllib3: urllib3: Denial of Service due to excessive HTTP response decompression",
"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:llvm-main@aarch64",
"Red Hat Hardened Images:llvm-main@noarch",
"Red Hat Hardened Images:llvm-main@src",
"Red Hat Hardened Images:llvm-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-44432"
},
{
"category": "external",
"summary": "RHBZ#2477154",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477154"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-44432",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-44432"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-44432",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44432"
},
{
"category": "external",
"summary": "https://github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j",
"url": "https://github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j"
}
],
"release_date": "2026-05-13T15:17:12.611000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-11T00:15:28+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:llvm-main@aarch64",
"Red Hat Hardened Images:llvm-main@noarch",
"Red Hat Hardened Images:llvm-main@src",
"Red Hat Hardened Images:llvm-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:7634"
}
],
"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:llvm-main@aarch64",
"Red Hat Hardened Images:llvm-main@noarch",
"Red Hat Hardened Images:llvm-main@src",
"Red Hat Hardened Images:llvm-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "urllib3: urllib3: Denial of Service due to excessive HTTP response decompression"
},
{
"cve": "CVE-2026-45149",
"cwe": {
"id": "CWE-770",
"name": "Allocation of Resources Without Limits or Throttling"
},
"discovery_date": "2026-05-29T21:02:00.092772+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2483481"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the brace-expansion library. This vulnerability allows an attacker to cause a Denial of Service (DoS) by providing a large numeric range for expansion. The library allocates excessive memory to generate all intermediate elements before applying the maximum limit, leading to high memory consumption and potential application crashes. This can impact the availability of systems using the library.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "brace-expansion: brace-expansion: Denial of Service due to excessive memory allocation when expanding large numeric ranges",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Red Hat products ship brace-expansion versions 1.x and 2.x, which are not affected by this vulnerability. The flaw exists only in versions 5.0.0 through 5.0.5.",
"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": [
"Red Hat Hardened Images:llvm-main@aarch64",
"Red Hat Hardened Images:llvm-main@noarch",
"Red Hat Hardened Images:llvm-main@src",
"Red Hat Hardened Images:llvm-main@x86_64"
]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-45149"
},
{
"category": "external",
"summary": "RHBZ#2483481",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2483481"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-45149",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-45149"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-45149",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45149"
},
{
"category": "external",
"summary": "https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-jxxr-4gwj-5jf2",
"url": "https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-jxxr-4gwj-5jf2"
}
],
"release_date": "2026-05-29T19:55:07.337000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-04-11T00:15:28+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:llvm-main@aarch64",
"Red Hat Hardened Images:llvm-main@noarch",
"Red Hat Hardened Images:llvm-main@src",
"Red Hat Hardened Images:llvm-main@x86_64"
],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:7634"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
"Red Hat Hardened Images:llvm-main@aarch64",
"Red Hat Hardened Images:llvm-main@noarch",
"Red Hat Hardened Images:llvm-main@src",
"Red Hat Hardened Images:llvm-main@x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"Red Hat Hardened Images:llvm-main@aarch64",
"Red Hat Hardened Images:llvm-main@noarch",
"Red Hat Hardened Images:llvm-main@src",
"Red Hat Hardened Images:llvm-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "brace-expansion: brace-expansion: Denial of Service due to excessive memory allocation when expanding large numeric ranges"
}
]
}
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.