RHSA-2026:60853

Vulnerability from csaf_redhat - Published: 2026-08-29 13:59 - Updated: 2026-08-29 18:13
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: libevent: * libevent-2.1.12-19.1.hum1 (aarch64, x86_64) * libevent-devel-2.1.12-19.1.hum1 (aarch64, x86_64) * libevent-doc-2.1.12-19.1.hum1 (noarch) * libevent-2.1.12-19.1.hum1.src (src) Security Fix(es): libevent: * CVE-2026-63379 * CVE-2026-63381 * CVE-2026-63383 * CVE-2026-63384 * CVE-2026-63388
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-2026-63379

A flaw was found in Libevent, an event notification library. An unauthenticated remote attacker can exploit a vulnerability where chunked HTTP (Hypertext Transfer Protocol) trailers are incorrectly merged into request headers. This allows the attacker to place security-sensitive fields in trailers, causing an upstream proxy and the Libevent application to interpret different effective headers. This can lead to header smuggling, authorization bypass, proxy-header spoofing, or cache poisoning.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:libevent-main@aarch64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@noarch —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@src —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@x86_64 —
Vendor Fix fix
Threats
Impact Moderate
CVE-2026-63381

A flaw was found in Libevent, an event notification library. A use-after-free vulnerability exists in the `evbuffer_add_buffer_reference` function when it processes an output buffer with a zero length. This can lead to a dangling pointer, which an attacker could exploit to cause memory corruption or crash the application.

6.6 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
CWE-825 - Expired Pointer Dereference
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:libevent-main@aarch64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@noarch —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@src —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@x86_64 —
Vendor Fix fix
Threats
Impact Moderate
CVE-2026-63383

A flaw was found in Libevent, an event notification library. A remote attacker could exploit an out-of-bounds read vulnerability in the `decode_tag_internal()` function by sending specially crafted, attacker-controlled tagged RPC (Remote Procedure Call) data. This could lead to a denial of service, causing the process that decodes the data to crash.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-125 - Out-of-bounds Read
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:libevent-main@aarch64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@noarch —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@src —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@x86_64 —
Vendor Fix fix
Threats
Impact Important
CVE-2026-63384

A flaw was found in Libevent. An incorrect integer conversion in the `evtag_unmarshal_header` function allows a remote attacker to provide a specially crafted payload length. This can lead to a wrapped large allocation request, resulting in a denial of service (DoS) for the affected system.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-190 - Integer Overflow or Wraparound
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:libevent-main@aarch64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@noarch —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@src —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@x86_64 —
Vendor Fix fix
Threats
Impact Important
CVE-2026-63388

A flaw was found in Libevent. A heap out-of-bounds write vulnerability in the `bufferevent_socket_set_conn_address_` function allows an unauthenticated local peer to achieve arbitrary code execution. By connecting to an AF_UNIX listener, an attacker can overwrite critical heap data, leading to memory corruption and potentially full control over the affected system. This can severely impact the confidentiality, integrity, and availability of data and services.

8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-787 - Out-of-bounds Write
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:libevent-main@aarch64 —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@noarch —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@src —
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:libevent-main@x86_64 —
Vendor Fix fix
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:60853 self
https://access.redhat.com/security/cve/CVE-2026-63379 external
https://access.redhat.com/security/cve/CVE-2026-63381 external
https://access.redhat.com/security/cve/CVE-2026-63383 external
https://access.redhat.com/security/cve/CVE-2026-63384 external
https://access.redhat.com/security/cve/CVE-2026-63388 external
https://access.redhat.com/security/updates/classi… external
https://images.redhat.com/ external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-63379 self
https://bugzilla.redhat.com/show_bug.cgi?id=2520667 external
https://www.cve.org/CVERecord?id=CVE-2026-63379 external
https://nvd.nist.gov/vuln/detail/CVE-2026-63379 external
https://github.com/libevent/libevent/commit/87e8e… external
https://github.com/libevent/libevent/commit/b8470… external
https://github.com/libevent/libevent/releases/tag… external
https://github.com/libevent/libevent/releases/tag… external
https://github.com/libevent/libevent/security/adv… external
https://access.redhat.com/security/cve/CVE-2026-63381 self
https://bugzilla.redhat.com/show_bug.cgi?id=2520657 external
https://www.cve.org/CVERecord?id=CVE-2026-63381 external
https://nvd.nist.gov/vuln/detail/CVE-2026-63381 external
https://github.com/libevent/libevent/commit/5cb95… external
https://github.com/libevent/libevent/commit/9db09… external
https://github.com/libevent/libevent/security/adv… external
https://access.redhat.com/security/cve/CVE-2026-63383 self
https://bugzilla.redhat.com/show_bug.cgi?id=2520654 external
https://www.cve.org/CVERecord?id=CVE-2026-63383 external
https://nvd.nist.gov/vuln/detail/CVE-2026-63383 external
https://github.com/libevent/libevent/commit/91ed8… external
https://github.com/libevent/libevent/commit/e1f9e… external
https://github.com/libevent/libevent/security/adv… external
https://access.redhat.com/security/cve/CVE-2026-63384 self
https://bugzilla.redhat.com/show_bug.cgi?id=2520658 external
https://www.cve.org/CVERecord?id=CVE-2026-63384 external
https://nvd.nist.gov/vuln/detail/CVE-2026-63384 external
https://github.com/libevent/libevent/commit/109c1… external
https://github.com/libevent/libevent/commit/5e3c6… external
https://github.com/libevent/libevent/security/adv… external
https://access.redhat.com/security/cve/CVE-2026-63388 self
https://bugzilla.redhat.com/show_bug.cgi?id=2520661 external
https://www.cve.org/CVERecord?id=CVE-2026-63388 external
https://nvd.nist.gov/vuln/detail/CVE-2026-63388 external
https://github.com/libevent/libevent/commit/52057… external
https://github.com/libevent/libevent/commit/ef38f… external
https://github.com/libevent/libevent/security/adv… external
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "An update for Red Hat Hardened Images RPMs is now available.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "This update includes the following RPMs:\n\nlibevent:\n  * libevent-2.1.12-19.1.hum1 (aarch64, x86_64)\n  * libevent-devel-2.1.12-19.1.hum1 (aarch64, x86_64)\n  * libevent-doc-2.1.12-19.1.hum1 (noarch)\n  * libevent-2.1.12-19.1.hum1.src (src)\n\nSecurity Fix(es):\n\nlibevent:\n  * CVE-2026-63379\n  * CVE-2026-63381\n  * CVE-2026-63383\n  * CVE-2026-63384\n  * CVE-2026-63388",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "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.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2026:60853",
        "url": "https://access.redhat.com/errata/RHSA-2026:60853"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-63379",
        "url": "https://access.redhat.com/security/cve/CVE-2026-63379"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-63381",
        "url": "https://access.redhat.com/security/cve/CVE-2026-63381"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-63383",
        "url": "https://access.redhat.com/security/cve/CVE-2026-63383"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-63384",
        "url": "https://access.redhat.com/security/cve/CVE-2026-63384"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/cve/CVE-2026-63388",
        "url": "https://access.redhat.com/security/cve/CVE-2026-63388"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/",
        "url": "https://access.redhat.com/security/updates/classification/"
      },
      {
        "category": "external",
        "summary": "https://images.redhat.com/",
        "url": "https://images.redhat.com/"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_60853.json"
      }
    ],
    "title": "Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update",
    "tracking": {
      "current_release_date": "2026-08-29T18:13:43+00:00",
      "generator": {
        "date": "2026-08-29T18:13:43+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "5.3.16"
        }
      },
      "id": "RHSA-2026:60853",
      "initial_release_date": "2026-08-29T13:59:54+00:00",
      "revision_history": [
        {
          "date": "2026-08-29T13:59:54+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-08-29T14:01:55+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2026-08-29T18:13:43+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Hardened Images",
                "product": {
                  "name": "Red Hat Hardened Images",
                  "product_id": "Red Hat Hardened Images",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:hummingbird:1"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Hardened Images"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libevent-main@aarch64",
                "product": {
                  "name": "libevent-main@aarch64",
                  "product_id": "libevent-main@aarch64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/libevent@2.1.12-19.1.hum1?arch=aarch64\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-aarch64-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "aarch64"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libevent-main@src",
                "product": {
                  "name": "libevent-main@src",
                  "product_id": "libevent-main@src",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/libevent@2.1.12-19.1.hum1?arch=src\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-source-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "src"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libevent-main@x86_64",
                "product": {
                  "name": "libevent-main@x86_64",
                  "product_id": "libevent-main@x86_64",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/libevent@2.1.12-19.1.hum1?arch=x86_64\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-x86_64-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "libevent-main@noarch",
                "product": {
                  "name": "libevent-main@noarch",
                  "product_id": "libevent-main@noarch",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/libevent-doc@2.1.12-19.1.hum1?arch=noarch\u0026distro=hummingbird-20251124\u0026repository_id=public-hummingbird-x86_64-rpms"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "noarch"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-main@aarch64 as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:libevent-main@aarch64"
        },
        "product_reference": "libevent-main@aarch64",
        "relates_to_product_reference": "Red Hat Hardened Images"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-main@noarch as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:libevent-main@noarch"
        },
        "product_reference": "libevent-main@noarch",
        "relates_to_product_reference": "Red Hat Hardened Images"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-main@src as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:libevent-main@src"
        },
        "product_reference": "libevent-main@src",
        "relates_to_product_reference": "Red Hat Hardened Images"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "libevent-main@x86_64 as a component of Red Hat Hardened Images",
          "product_id": "Red Hat Hardened Images:libevent-main@x86_64"
        },
        "product_reference": "libevent-main@x86_64",
        "relates_to_product_reference": "Red Hat Hardened Images"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-63379",
      "cwe": {
        "id": "CWE-444",
        "name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
      },
      "discovery_date": "2026-08-20T18:11:26.473492+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2520667"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Libevent, an event notification library. An unauthenticated remote attacker can exploit a vulnerability where chunked HTTP (Hypertext Transfer Protocol) trailers are incorrectly merged into request headers. This allows the attacker to place security-sensitive fields in trailers, causing an upstream proxy and the Libevent application to interpret different effective headers. This can lead to header smuggling, authorization bypass, proxy-header spoofing, or cache poisoning.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "libevent: Libevent: HTTP header smuggling allows authorization bypass or cache poisoning",
          "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:libevent-main@aarch64",
          "Red Hat Hardened Images:libevent-main@noarch",
          "Red Hat Hardened Images:libevent-main@src",
          "Red Hat Hardened Images:libevent-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-63379"
        },
        {
          "category": "external",
          "summary": "RHBZ#2520667",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520667"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-63379",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-63379"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63379",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63379"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/87e8e44fa774e9677b089b1a5114ee68aefa1636",
          "url": "https://github.com/libevent/libevent/commit/87e8e44fa774e9677b089b1a5114ee68aefa1636"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/b847071141b3827900d536594ec9045eb0a4c485",
          "url": "https://github.com/libevent/libevent/commit/b847071141b3827900d536594ec9045eb0a4c485"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/security/advisories/GHSA-2gmv-p5m7-98p6",
          "url": "https://github.com/libevent/libevent/security/advisories/GHSA-2gmv-p5m7-98p6"
        }
      ],
      "release_date": "2026-08-20T17:55:00.789000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-29T13:59:54+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:libevent-main@aarch64",
            "Red Hat Hardened Images:libevent-main@noarch",
            "Red Hat Hardened Images:libevent-main@src",
            "Red Hat Hardened Images:libevent-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:60853"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:libevent-main@aarch64",
            "Red Hat Hardened Images:libevent-main@noarch",
            "Red Hat Hardened Images:libevent-main@src",
            "Red Hat Hardened Images:libevent-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "libevent: Libevent: HTTP header smuggling allows authorization bypass or cache poisoning"
    },
    {
      "cve": "CVE-2026-63381",
      "cwe": {
        "id": "CWE-825",
        "name": "Expired Pointer Dereference"
      },
      "discovery_date": "2026-08-20T18:02:05.183416+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2520657"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Libevent, an event notification library. A use-after-free vulnerability exists in the `evbuffer_add_buffer_reference` function when it processes an output buffer with a zero length. This can lead to a dangling pointer, which an attacker could exploit to cause memory corruption or crash the application.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "libevent: Libevent: Memory corruption due to use-after-free",
          "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:libevent-main@aarch64",
          "Red Hat Hardened Images:libevent-main@noarch",
          "Red Hat Hardened Images:libevent-main@src",
          "Red Hat Hardened Images:libevent-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-63381"
        },
        {
          "category": "external",
          "summary": "RHBZ#2520657",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520657"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-63381",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-63381"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63381",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63381"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/5cb95ba2f804f8aff46f88d58391c71e1251cd1c",
          "url": "https://github.com/libevent/libevent/commit/5cb95ba2f804f8aff46f88d58391c71e1251cd1c"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/9db091b04f569be3a700fa9860ef02f90b830af9",
          "url": "https://github.com/libevent/libevent/commit/9db091b04f569be3a700fa9860ef02f90b830af9"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/security/advisories/GHSA-c2pj-cg4r-88c8",
          "url": "https://github.com/libevent/libevent/security/advisories/GHSA-c2pj-cg4r-88c8"
        }
      ],
      "release_date": "2026-08-20T17:50:09.322000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-29T13:59:54+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:libevent-main@aarch64",
            "Red Hat Hardened Images:libevent-main@noarch",
            "Red Hat Hardened Images:libevent-main@src",
            "Red Hat Hardened Images:libevent-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:60853"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.6,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:libevent-main@aarch64",
            "Red Hat Hardened Images:libevent-main@noarch",
            "Red Hat Hardened Images:libevent-main@src",
            "Red Hat Hardened Images:libevent-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "libevent: Libevent: Memory corruption due to use-after-free"
    },
    {
      "cve": "CVE-2026-63383",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2026-08-20T18:01:02.048026+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2520654"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Libevent, an event notification library. A remote attacker could exploit an out-of-bounds read vulnerability in the `decode_tag_internal()` function by sending specially crafted, attacker-controlled tagged RPC (Remote Procedure Call) data. This could lead to a denial of service, causing the process that decodes the data to crash.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "libevent: Libevent: Denial of Service via malformed RPC data",
          "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:libevent-main@aarch64",
          "Red Hat Hardened Images:libevent-main@noarch",
          "Red Hat Hardened Images:libevent-main@src",
          "Red Hat Hardened Images:libevent-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-63383"
        },
        {
          "category": "external",
          "summary": "RHBZ#2520654",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520654"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-63383",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-63383"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63383",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63383"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/91ed8745eebabdd27592a83d350338a8c4626321",
          "url": "https://github.com/libevent/libevent/commit/91ed8745eebabdd27592a83d350338a8c4626321"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/e1f9e21887c6b104e206a718385ba3ffc75180cb",
          "url": "https://github.com/libevent/libevent/commit/e1f9e21887c6b104e206a718385ba3ffc75180cb"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/security/advisories/GHSA-fj29-64w6-73h6",
          "url": "https://github.com/libevent/libevent/security/advisories/GHSA-fj29-64w6-73h6"
        }
      ],
      "release_date": "2026-08-20T17:48:24.568000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-29T13:59:54+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:libevent-main@aarch64",
            "Red Hat Hardened Images:libevent-main@noarch",
            "Red Hat Hardened Images:libevent-main@src",
            "Red Hat Hardened Images:libevent-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:60853"
        }
      ],
      "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:libevent-main@aarch64",
            "Red Hat Hardened Images:libevent-main@noarch",
            "Red Hat Hardened Images:libevent-main@src",
            "Red Hat Hardened Images:libevent-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "libevent: Libevent: Denial of Service via malformed RPC data"
    },
    {
      "cve": "CVE-2026-63384",
      "cwe": {
        "id": "CWE-190",
        "name": "Integer Overflow or Wraparound"
      },
      "discovery_date": "2026-08-20T18:01:40.543023+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2520658"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Libevent. An incorrect integer conversion in the `evtag_unmarshal_header` function allows a remote attacker to provide a specially crafted payload length. This can lead to a wrapped large allocation request, resulting in a denial of service (DoS) for the affected system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "libevent: Libevent: Denial of Service via integer conversion error in `evtag_unmarshal_header`",
          "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:libevent-main@aarch64",
          "Red Hat Hardened Images:libevent-main@noarch",
          "Red Hat Hardened Images:libevent-main@src",
          "Red Hat Hardened Images:libevent-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-63384"
        },
        {
          "category": "external",
          "summary": "RHBZ#2520658",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520658"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-63384",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-63384"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63384",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63384"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/109c16499282959d70f56ec3baf4c8b1e6646bda",
          "url": "https://github.com/libevent/libevent/commit/109c16499282959d70f56ec3baf4c8b1e6646bda"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/5e3c6ebe342b34c5a9bcf48e9a32ad6708b9c416",
          "url": "https://github.com/libevent/libevent/commit/5e3c6ebe342b34c5a9bcf48e9a32ad6708b9c416"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/security/advisories/GHSA-45c6-qx49-89m8",
          "url": "https://github.com/libevent/libevent/security/advisories/GHSA-45c6-qx49-89m8"
        }
      ],
      "release_date": "2026-08-20T17:53:08.417000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-29T13:59:54+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:libevent-main@aarch64",
            "Red Hat Hardened Images:libevent-main@noarch",
            "Red Hat Hardened Images:libevent-main@src",
            "Red Hat Hardened Images:libevent-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:60853"
        }
      ],
      "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:libevent-main@aarch64",
            "Red Hat Hardened Images:libevent-main@noarch",
            "Red Hat Hardened Images:libevent-main@src",
            "Red Hat Hardened Images:libevent-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "libevent: Libevent: Denial of Service via integer conversion error in `evtag_unmarshal_header`"
    },
    {
      "cve": "CVE-2026-63388",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-08-20T18:02:33.843530+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2520661"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Libevent. A heap out-of-bounds write vulnerability in the `bufferevent_socket_set_conn_address_` function allows an unauthenticated local peer to achieve arbitrary code execution. By connecting to an AF_UNIX listener, an attacker can overwrite critical heap data, leading to memory corruption and potentially full control over the affected system. This can severely impact the confidentiality, integrity, and availability of data and services.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "libevent: Libevent: Arbitrary code execution via heap out-of-bounds write in AF_UNIX handling",
          "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:libevent-main@aarch64",
          "Red Hat Hardened Images:libevent-main@noarch",
          "Red Hat Hardened Images:libevent-main@src",
          "Red Hat Hardened Images:libevent-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-63388"
        },
        {
          "category": "external",
          "summary": "RHBZ#2520661",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2520661"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-63388",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-63388"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-63388",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63388"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/52057cb33d0c20c0a0453fbabe6c0c96854931b9",
          "url": "https://github.com/libevent/libevent/commit/52057cb33d0c20c0a0453fbabe6c0c96854931b9"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/commit/ef38f926e9cd1f082416c6fff13587bc1f431d72",
          "url": "https://github.com/libevent/libevent/commit/ef38f926e9cd1f082416c6fff13587bc1f431d72"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/security/advisories/GHSA-cvq5-vrvr-j338",
          "url": "https://github.com/libevent/libevent/security/advisories/GHSA-cvq5-vrvr-j338"
        }
      ],
      "release_date": "2026-08-20T17:44:18.435000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-29T13:59:54+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:libevent-main@aarch64",
            "Red Hat Hardened Images:libevent-main@noarch",
            "Red Hat Hardened Images:libevent-main@src",
            "Red Hat Hardened Images:libevent-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:60853"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:libevent-main@aarch64",
            "Red Hat Hardened Images:libevent-main@noarch",
            "Red Hat Hardened Images:libevent-main@src",
            "Red Hat Hardened Images:libevent-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "libevent: Libevent: Arbitrary code execution via heap out-of-bounds write in AF_UNIX handling"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.