{"id":"CVE-2026-21945","title":"Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security)","summary":"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.…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400","CWE-295"],"vendor":"oracle","product":"graalvm","affected":["graalvm = 21.3.16","graalvm_for_jdk = 17.0.17","graalvm_for_jdk = 21.0.9","jdk = 1.8.0","jdk = 11.0.29","jdk = 17.0.17","jdk = 21.0.9","jdk = 25.0.1","jre = 1.8.0","jre = 11.0.29","jre = 17.0.17","jre = 21.0.9","jre = 25.0.1"],"published":"2026-01-20","updated":"2026-06-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-21945","references":[{"url":"https://www.oracle.com/security-alerts/cpujan2026.html","label":"secalert_us@oracle.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:0847","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:0848","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:0895","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:0897","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:0899","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:0901","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:0927","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:0928","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:0931","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:0932","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:0933","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:1606","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:4832","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-21945","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2429927","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-032379.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21945.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-21945"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21945"},{"url":"https://www.oracle.com/security-alerts/cpujan2026.html#AppendixJAVA"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.0097,"epssPercentile":0.59872,"ingestedAt":"2026-06-30T13:26:50.527Z","patched":["enterprise_linux_server_v_7_els","openjdk_11_els_for_rhel 7","enterprise_linux_server_optional_v_7_els","openjdk_11_els_for_rhel 8","openjdk_11_els_for_rhel 9","enterprise_linux_appstream_eus_v_10_0","enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_8","enterprise_linux_appstream_aus_v_8_2","enterprise_linux_appstream_aus_v_8_4","enterprise_linux_appstream_eus_extension_v_8_4","enterprise_linux_appstream_aus_v_8_6","enterprise_linux_appstream_e4s_v_8_6","enterprise_linux_appstream_tus_v_8_6","enterprise_linux_appstream_e4s_v_8_8","enterprise_linux_appstream_tus_v_8_8","enterprise_linux_appstream_e4s_v_9_0","enterprise_linux_appstream_e4s_v_9_2","enterprise_linux_appstream_eus_v_9_4","enterprise_linux_appstream_eus_v_9_6","enterprise_linux_appstream_v_9","enterprise_linux_codeready_linux_builder_eus_v_10_0","enterprise_linux_codeready_linux_builder_v_10","enterprise_linux_crb_v_8","codeready_linux_builder_eus_v_9_4","codeready_linux_builder_eus_v_9_6","enterprise_linux_codeready_linux_builder_v_9","build_of_openjdk 17.0.18","build_of_openjdk 21.0.10","build_of_openjdk 25.0.2","build_of_openjdk 8u482","enterprise_linux_supplementary_v_8","temurin_build_of_openjdk 25.0.2"],"slug":"CVE-2026-21945","body":"## Overview\n\nVulnerability 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).\n\n## Affected\n\n- `graalvm = 21.3.16`\n- `graalvm_for_jdk = 17.0.17`\n- `graalvm_for_jdk = 21.0.9`\n- `jdk = 1.8.0`\n- `jdk = 11.0.29`\n- `jdk = 17.0.17`\n- `jdk = 21.0.9`\n- `jdk = 25.0.1`\n- `jre = 1.8.0`\n- `jre = 11.0.29`\n- `jre = 17.0.17`\n- `jre = 21.0.9`\n- `jre = 25.0.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:0931** · Red Hat · fixed in: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · released 2026-01-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:0931)\n- **RHSA-2026:0847** · Red Hat · fixed in: Red Hat OpenJDK 11 ELS for RHEL 7, Red Hat OpenJDK 11 ELS for RHEL 8, Red Hat OpenJDK 11 ELS for RHEL 9 · released 2026-01-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:0847)\n- **RHSA-2026:0928** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux AppStream (v. 9), … · released 2026-01-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:0928)\n- **RHSA-2026:0933** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-01-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:0933)\n- **RHSA-2026:0932** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream AUS (v. 8.2), Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), … · released 2026-01-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:0932)\n- **RHSA-2026:0927** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6), … · released 2026-01-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:0927)\n- **RHSA-2026:0897** · Red Hat · fixed in: Red Hat Build of OpenJDK 17.0.18 · released 2026-01-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:0897)\n- **RHSA-2026:0899** · Red Hat · fixed in: Red Hat Build of OpenJDK 21.0.10 · released 2026-01-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:0899)\n- **RHSA-2026:0901** · Red Hat · fixed in: Red Hat Build of OpenJDK 25.0.2 · released 2026-01-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:0901)\n- **RHSA-2026:0895** · Red Hat · fixed in: Red Hat Build of OpenJDK 8u482 · released 2026-01-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:0895)\n- **RHSA-2026:4832** · Red Hat · fixed in: Red Hat Enterprise Linux Supplementary (v. 8) · released 2026-03-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:4832)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 10 · updated 2026-09-19 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21945.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}