RHSA-2026:24069

Vulnerability from csaf_redhat - Published: 2026-06-07 05:26 - Updated: 2026-09-22 18:07
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: llvm21: * clang21-21.1.8-6.hum1 (aarch64, x86_64) * clang21-analyzer-21.1.8-6.hum1 (aarch64, x86_64) * clang21-devel-21.1.8-6.hum1 (aarch64, x86_64) * clang21-libs-21.1.8-6.hum1 (aarch64, x86_64) * clang21-resource-filesystem-21.1.8-6.hum1 (aarch64, x86_64) * clang21-tools-extra-21.1.8-6.hum1 (aarch64, x86_64) * clang21-tools-extra-devel-21.1.8-6.hum1 (aarch64, x86_64) * compiler-rt21-21.1.8-6.hum1 (aarch64, x86_64) * git-clang-format21-21.1.8-6.hum1 (aarch64, x86_64) * libomp21-21.1.8-6.hum1 (aarch64, x86_64) * libomp21-devel-21.1.8-6.hum1 (aarch64, x86_64) * lld21-21.1.8-6.hum1 (aarch64, x86_64) * lld21-devel-21.1.8-6.hum1 (aarch64, x86_64) * lld21-libs-21.1.8-6.hum1 (aarch64, x86_64) * lldb21-21.1.8-6.hum1 (aarch64, x86_64) * lldb21-devel-21.1.8-6.hum1 (aarch64, x86_64) * llvm21-21.1.8-6.hum1 (aarch64, x86_64) * llvm21-cmake-utils-21.1.8-6.hum1 (aarch64, x86_64) * llvm21-devel-21.1.8-6.hum1 (aarch64, x86_64) * llvm21-doc-21.1.8-6.hum1 (noarch) * llvm21-filesystem-21.1.8-6.hum1 (aarch64, x86_64) * llvm21-googletest-21.1.8-6.hum1 (aarch64, x86_64) * llvm21-libs-21.1.8-6.hum1 (aarch64, x86_64) * llvm21-static-21.1.8-6.hum1 (aarch64, x86_64) * llvm21-test-21.1.8-6.hum1 (aarch64, x86_64) * python3-clang21-21.1.8-6.hum1 (aarch64, x86_64) * llvm21-21.1.8-6.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.
CVE-2026-13573

A 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.

3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:clang21-0:21.1.8-6.hum1@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:clang21-0:21.1.8-6.hum1@x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:llvm21-0:21.1.8-6.hum1@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:llvm21-doc-0:21.1.8-6.hum1@noarch —
Vendor Fix fix
Workaround
Threats
Impact Low
CVE-2026-13574

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.

3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE-805 - Buffer Access with Incorrect Length Value
Affected products
Fixed 4 products, the same list as for CVE-2026-13573
Threats
Impact Low
CVE-2026-44432

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.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Affected products
Fixed 4 products, the same list as for CVE-2026-13573
Threats
Impact Important
CVE-2026-45149

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.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE-770 - Allocation of Resources Without Limits or Throttling
Affected products
Fixed 4 products, the same list as for CVE-2026-13573
Threats
Impact Moderate
References
URL Category
https://access.redhat.com/errata/RHSA-2026:24069 self
https://images.redhat.com/ external
https://access.redhat.com/security/cve/CVE-2026-45149 external
https://access.redhat.com/security/updates/classi… external
https://access.redhat.com/security/cve/CVE-2026-44432 external
https://access.redhat.com/security/cve/CVE-2026-13573 external
https://access.redhat.com/security/cve/CVE-2026-13574 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-13573 self
https://bugzilla.redhat.com/show_bug.cgi?id=2494424 external
https://www.cve.org/CVERecord?id=CVE-2026-13573 external
https://nvd.nist.gov/vuln/detail/CVE-2026-13573 external
https://github.com/llvm/llvm-project/ external
https://github.com/llvm/llvm-project/issues/199187 external
https://github.com/user-attachments/files/2814169… external
https://vuldb.com/cve/CVE-2026-13573 external
https://vuldb.com/submit/844457 external
https://vuldb.com/vuln/374581 external
https://vuldb.com/vuln/374581/cti external
https://access.redhat.com/security/cve/CVE-2026-13574 self
https://bugzilla.redhat.com/show_bug.cgi?id=2494420 external
https://www.cve.org/CVERecord?id=CVE-2026-13574 external
https://nvd.nist.gov/vuln/detail/CVE-2026-13574 external
https://github.com/llvm/llvm-project/issues/199191 external
https://github.com/user-attachments/files/2814261… external
https://vuldb.com/cve/CVE-2026-13574 external
https://vuldb.com/submit/844468 external
https://vuldb.com/vuln/374582 external
https://vuldb.com/vuln/374582/cti external
https://access.redhat.com/security/cve/CVE-2026-44432 self
https://bugzilla.redhat.com/show_bug.cgi?id=2477154 external
https://www.cve.org/CVERecord?id=CVE-2026-44432 external
https://nvd.nist.gov/vuln/detail/CVE-2026-44432 external
https://github.com/urllib3/urllib3/security/advis… external
https://access.redhat.com/security/cve/CVE-2026-45149 self
https://bugzilla.redhat.com/show_bug.cgi?id=2483481 external
https://www.cve.org/CVERecord?id=CVE-2026-45149 external
https://nvd.nist.gov/vuln/detail/CVE-2026-45149 external
https://github.com/juliangruber/brace-expansion/s… external
To clipboard 

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    {
      "cve": "CVE-2026-13573",
      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
      },
      "discovery_date": "2026-06-29T15:01:19.470118+00:00",
      "ids": [
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          "text": "2494424"
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          "text": "A 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.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "llvm: llvm: Denial of Service via stack-based buffer overflow in StringMap::insert",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw has a Low impact as it requires a local attacker to exploit a stack-based buffer overflow in the `llvm::StringMap::insert` function. Successful exploitation could lead to a denial of service, affecting the availability of systems utilizing the vulnerable LLVM component. The vulnerability is limited to local access, reducing its overall risk in typical Red Hat deployments.",
          "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"
        }
      ],
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13573"
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      "remediations": [
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          "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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            "Red Hat Hardened Images:llvm21-doc-0:21.1.8-6.hum1@noarch"
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          "category": "workaround",
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            "availabilityImpact": "LOW",
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            "confidentialityImpact": "NONE",
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            "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",
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          "details": "Low"
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      "title": "llvm: llvm: Denial of Service via stack-based buffer overflow in StringMap::insert"
    },
    {
      "cve": "CVE-2026-13574",
      "cwe": {
        "id": "CWE-805",
        "name": "Buffer Access with Incorrect Length Value"
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "llvm: llvm-project: LLVM: Denial of service via heap-based buffer overflow in Bitcode File Handler",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability has a Low impact, as it requires a local attacker to exploit a heap-based buffer overflow in the LLVM Bitcode File Handler. Successful exploitation could lead to a denial of service by making the affected system unavailable.",
          "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": {
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        {
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-13574",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-13574"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-13574",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13574"
        },
        {
          "category": "external",
          "summary": "https://github.com/llvm/llvm-project/",
          "url": "https://github.com/llvm/llvm-project/"
        },
        {
          "category": "external",
          "summary": "https://github.com/llvm/llvm-project/issues/199191",
          "url": "https://github.com/llvm/llvm-project/issues/199191"
        },
        {
          "category": "external",
          "summary": "https://github.com/user-attachments/files/28142619/poc.zip",
          "url": "https://github.com/user-attachments/files/28142619/poc.zip"
        },
        {
          "category": "external",
          "summary": "https://vuldb.com/cve/CVE-2026-13574",
          "url": "https://vuldb.com/cve/CVE-2026-13574"
        },
        {
          "category": "external",
          "summary": "https://vuldb.com/submit/844468",
          "url": "https://vuldb.com/submit/844468"
        },
        {
          "category": "external",
          "summary": "https://vuldb.com/vuln/374582",
          "url": "https://vuldb.com/vuln/374582"
        },
        {
          "category": "external",
          "summary": "https://vuldb.com/vuln/374582/cti",
          "url": "https://vuldb.com/vuln/374582/cti"
        }
      ],
      "release_date": "2026-06-29T14:15:09.190000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-07T05:26:31+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:clang21-0:21.1.8-6.hum1@aarch64",
            "Red Hat Hardened Images:clang21-0:21.1.8-6.hum1@x86_64",
            "Red Hat Hardened Images:llvm21-0:21.1.8-6.hum1@src",
            "Red Hat Hardened Images:llvm21-doc-0:21.1.8-6.hum1@noarch"
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          "restart_required": {
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          },
          "url": "https://access.redhat.com/errata/RHSA-2026:24069"
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      ],
      "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"
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        {
          "category": "impact",
          "details": "Low"
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      ],
      "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",
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          "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.",
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          "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"
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-44432"
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        {
          "category": "external",
          "summary": "RHBZ#2477154",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477154"
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-44432",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-44432"
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          "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",
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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      "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",
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2483481"
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      ],
      "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"
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      ],
      "product_status": {
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-45149"
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        {
          "category": "external",
          "summary": "RHBZ#2483481",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2483481"
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        {
          "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"
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      "release_date": "2026-05-29T19:55:07.337000+00:00",
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        {
          "category": "vendor_fix",
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            "Red Hat Hardened Images:llvm21-0:21.1.8-6.hum1@src",
            "Red Hat Hardened Images:llvm21-doc-0:21.1.8-6.hum1@noarch"
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        },
        {
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          "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.",
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            "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": [
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            "Red Hat Hardened Images:clang21-0:21.1.8-6.hum1@x86_64",
            "Red Hat Hardened Images:llvm21-0:21.1.8-6.hum1@src",
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "brace-expansion: brace-expansion: Denial of Service due to excessive memory allocation when expanding large numeric ranges"
    }
  ]
}



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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.



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.