RHSA-2026:0848

Vulnerability from csaf_redhat - Published: 2026-01-21 13:39 - Updated: 2026-01-22 09:26
Summary
Red Hat Security Advisory: OpenJDK 11.0.30 ELS Security Update for Portable Linux Builds

Notes

Topic
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The OpenJDK 11 ELS packages provide the OpenJDK 11 Java Runtime Environment and the OpenJDK 11 Java Software Development Kit. This release of the Red Hat build of OpenJDK 11 (11.0.30) with Extended Lifecycle Support for portable Linux serves as a replacement for the Red Hat build of OpenJDK 11 (11.0.29) and includes security and bug fixes as well as enhancements. For further information, refer to the release notes linked to in the References section. Security Fix(es): * JDK: LIBPNG buffer overflow (CVE-2025-64720) * JDK: LIBPNG heap buffer overflow (CVE-2025-65018) * JDK: Improve JMX connections (CVE-2026-21925) * JDK: Improve HttpServer Request handling (CVE-2026-21933) * JDK: Enhance Certificate Checking (CVE-2026-21945) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
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.
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        "text": "An update is now available for OpenJDK.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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        "text": "The OpenJDK 11 ELS packages provide the OpenJDK 11 Java Runtime Environment and the OpenJDK 11 Java Software Development Kit.\n\nThis release of the Red Hat build of OpenJDK 11 (11.0.30) with Extended Lifecycle Support for portable Linux serves as a replacement for the Red Hat build of OpenJDK 11 (11.0.29) and includes security and bug fixes as well as enhancements. For further information, refer to the release notes linked to in the References section.\n\nSecurity Fix(es):\n\n* JDK: LIBPNG buffer overflow (CVE-2025-64720)\n* JDK: LIBPNG heap buffer overflow (CVE-2025-65018)\n* JDK: Improve JMX connections (CVE-2026-21925)\n* JDK: Improve HttpServer Request handling (CVE-2026-21933)\n* JDK: Enhance Certificate Checking (CVE-2026-21945)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
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      "discovery_date": "2025-11-25T00:00:54.081073+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2416904"
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      ],
      "notes": [
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          "category": "description",
          "text": "LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, an out-of-bounds read vulnerability exists in png_image_read_composite when processing palette images with PNG_FLAG_OPTIMIZE_ALPHA enabled. The palette compositing code in png_init_read_transformations incorrectly applies background compositing during premultiplication, violating the invariant component \u2264 alpha \u00d7 257 required by the simplified PNG API. This issue has been patched in version 1.6.51.",
          "title": "Vulnerability description"
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          "text": "libpng: LIBPNG buffer overflow",
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          "text": "This vulnerability is rated Important for Red Hat products. An out-of-bounds read in libpng can occur when processing specially crafted palette images with `PNG_FLAG_OPTIMIZE_ALPHA` enabled. Successful exploitation requires a user to process a malicious PNG file, leading to potential application crash or information disclosure.\n\njava-*-openjdk-headless packages do not contain libsplashscreen.so, hence are not affected.",
          "title": "Statement"
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        {
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          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-64720",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-64720"
        },
        {
          "category": "external",
          "summary": "https://github.com/pnggroup/libpng/commit/08da33b4c88cfcd36e5a706558a8d7e0e4773643",
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          "summary": "https://github.com/pnggroup/libpng/security/advisories/GHSA-hfc7-ph9c-wcww",
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      "release_date": "2025-11-24T23:45:38.315000+00:00",
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          "details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "ids": [
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          "text": "2416907"
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          "text": "LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From version 1.6.0 to before 1.6.51, there is a heap buffer overflow vulnerability in the libpng simplified API function png_image_finish_read when processing 16-bit interlaced PNGs with 8-bit output format. Attacker-crafted interlaced PNG files cause heap writes beyond allocated buffer bounds. This issue has been patched in version 1.6.51.",
          "title": "Vulnerability description"
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          "text": "libpng: LIBPNG heap buffer overflow",
          "title": "Vulnerability summary"
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          "text": "This vulnerability is rated Important for Red Hat products. A heap buffer overflow exists in the libpng library\u0027s png_image_finish_read function when processing specially crafted 16-bit interlaced PNG images with an 8-bit output format. Successful exploitation requires a user or an automated system to process a malicious PNG file, which could lead to application crashes or arbitrary code execution.\n\njava-*-openjdk-headless packages do not contain libsplashscreen.so, hence are not affected.",
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          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-65018",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-65018"
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          "summary": "https://github.com/pnggroup/libpng/commit/16b5e3823918840aae65c0a6da57c78a5a496a4d",
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          "summary": "https://github.com/pnggroup/libpng/commit/218612ddd6b17944e21eda56caf8b4bf7779d1ea",
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        },
        {
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          "summary": "https://github.com/pnggroup/libpng/issues/755",
          "url": "https://github.com/pnggroup/libpng/issues/755"
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          "summary": "https://github.com/pnggroup/libpng/pull/757",
          "url": "https://github.com/pnggroup/libpng/pull/757"
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        {
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          "summary": "https://github.com/pnggroup/libpng/security/advisories/GHSA-7wv6-48j4-hj3g",
          "url": "https://github.com/pnggroup/libpng/security/advisories/GHSA-7wv6-48j4-hj3g"
        }
      ],
      "release_date": "2025-11-24T23:50:18.294000+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-01-21T13:39:28+00:00",
          "details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
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      "scores": [
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          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
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          },
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "libpng: LIBPNG heap buffer overflow"
    },
    {
      "cve": "CVE-2026-21925",
      "cwe": {
        "id": "CWE-322",
        "name": "Key Exchange without Entity Authentication"
      },
      "discovery_date": "2026-01-15T11:58:37.537000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2429924"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: RMI).  Supported versions that are affected are Oracle Java SE: 8u471, 8u471-b50, 8u471-perf, 11.0.29, 17.0.17, 21.0.9, 25.0.1; Oracle GraalVM for JDK: 17.0.17 and  21.0.9; Oracle GraalVM Enterprise Edition: 21.3.16. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition.  Successful attacks of this vulnerability can result in  unauthorized update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as  unauthorized read access to a subset of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 4.8 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "openjdk: Improve JMX connections (Oracle CPU 2026-01)",
          "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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      },
      "references": [
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-21925"
        },
        {
          "category": "external",
          "summary": "RHBZ#2429924",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429924"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-21925",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-21925"
        },
        {
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          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-21925",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21925"
        }
      ],
      "release_date": "2026-01-20T21:21:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-01-21T13:39:28+00:00",
          "details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
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      "scores": [
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          "cvss_v3": {
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            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "OPENJDK ELS 11.0.30"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "openjdk: Improve JMX connections (Oracle CPU 2026-01)"
    },
    {
      "cve": "CVE-2026-21933",
      "cwe": {
        "id": "CWE-93",
        "name": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)"
      },
      "discovery_date": "2026-01-15T12:03:57.932000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2429926"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking).  Supported versions that are affected are Oracle Java SE: 8u471, 8u471-b50, 8u471-perf, 11.0.29, 17.0.17, 21.0.9, 25.0.1; Oracle GraalVM for JDK: 17.0.17 and  21.0.9; Oracle GraalVM Enterprise Edition: 21.3.16. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition.  Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in  unauthorized update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as  unauthorized read access to a subset of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 6.1 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "openjdk: Improve HttpServer Request handling (Oracle CPU 2026-01)",
          "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": [
          "OPENJDK ELS 11.0.30"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-21933"
        },
        {
          "category": "external",
          "summary": "RHBZ#2429926",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429926"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-21933",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-21933"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-21933",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21933"
        }
      ],
      "release_date": "2026-01-20T21:21:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-01-21T13:39:28+00:00",
          "details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "OPENJDK ELS 11.0.30"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:0848"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "OPENJDK ELS 11.0.30"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "openjdk: Improve HttpServer Request handling (Oracle CPU 2026-01)"
    },
    {
      "cve": "CVE-2026-21945",
      "cwe": {
        "id": "CWE-295",
        "name": "Improper Certificate Validation"
      },
      "discovery_date": "2026-01-15T12:05:58.026000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2429927"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security).  Supported versions that are affected are Oracle Java SE: 8u471, 8u471-b50, 8u471-perf, 11.0.29, 17.0.17, 21.0.9, 25.0.1; Oracle GraalVM for JDK: 17.0.17 and  21.0.9; Oracle GraalVM Enterprise Edition: 21.3.16. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 7.5 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "openjdk: Enhance Certificate Checking (Oracle CPU 2026-01)",
          "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": [
          "OPENJDK ELS 11.0.30"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-21945"
        },
        {
          "category": "external",
          "summary": "RHBZ#2429927",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429927"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-21945",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-21945"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-21945",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21945"
        }
      ],
      "release_date": "2026-01-20T21:21:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-01-21T13:39:28+00:00",
          "details": "Before applying this update, make sure all previously released errata relevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "OPENJDK ELS 11.0.30"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:0848"
        }
      ],
      "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": [
            "OPENJDK ELS 11.0.30"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "openjdk: Enhance Certificate Checking (Oracle CPU 2026-01)"
    }
  ]
}


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Taxonomy of the tags.




Sightings

Author Source Type Date

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.