{"id":"CVE-2026-87823","title":"zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets","summary":"zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","cwe":["CWE-190","CWE-125"],"vendor":"luben","product":"zstd-jni","affected":["zstd-jni >= 1.1.1 < 1.5.7-14"],"published":"2026-09-09","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:16:54.383","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87823","references":[{"url":"https://github.com/luben/zstd-jni","label":"disclosure@vulncheck.com"},{"url":"https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/Zstd.java","label":"disclosure@vulncheck.com"},{"url":"https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/native/jni_zstd.c","label":"disclosure@vulncheck.com"},{"url":"https://github.com/luben/zstd-jni/commit/46dcb2a54c8b8f2ce2cad7187a7513f509c533ac","label":"disclosure@vulncheck.com"},{"url":"https://github.com/luben/zstd-jni/commit/d7a1c99322d5e1fc71932e722c0b5bb2fc525d3f","label":"disclosure@vulncheck.com"},{"url":"https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14","label":"disclosure@vulncheck.com"},{"url":"https://github.com/luben/zstd-jni/security/advisories/GHSA-jfr6-9xqw-2g2q","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/zstd-jni-1.1.1-through-1.5.7-13-out-of-bounds-read-via-direct-bytebuffer-frame-size-methods","label":"disclosure@vulncheck.com"},{"url":"https://github.com/luben/zstd-jni/security/advisories/GHSA-jfr6-9xqw-2g2q","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87823.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-87823"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531004"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-87823"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-87823"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-09T16:12:29.082517Z"},"ingestedAt":"2026-09-14T08:53:50.871Z","epss":0.00432,"epssPercentile":0.36922,"slug":"CVE-2026-87823","body":"## Overview\n\nzstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Ceph Storage 9 · no fix planned: Red Hat Ceph Storage 9 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-87823.json)","depth":"midnight","depthScore":57,"depthScoreParts":{"impact":45.1,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":20937,"id":"CVE-2026-87823","ts":1788974202341,"field":"exploit_available","old":"false","new":"true"}]}