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CVE-2026-87824— zstd-jni 1.3.3-1 through 1.5.7-13 Out-of-Bounds Read via Zstd.trainFromBufferDirect

Quick assessment

Affected
luben zstd-jni
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

zstd-jni 在 1.5.7-14 之前版本中， 未能正确验证样本缓冲区的容量，使得攻击者可以通过提供过大的每个样本长度值，从而读取超出缓冲区边界的数据。攻击者可以通过构造特定的样本长度数组，导致原生实现遍历超出缓冲区分配范围，引发越界内存访问，最终导致 JVM 终止。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services
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I. Basic Information for CVE-2026-87824

Vulnerability Information
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Vulnerability Title
zstd-jni 1.3.3-1 through 1.5.7-13 Out-of-Bounds Read via Zstd.trainFromBufferDirect
Source: CVE Program / CVE List V5
Vulnerability Description
zstd-jni before 1.5.7-14 fails to validate the samples buffer capacity in Zstd.trainFromBufferDirect, allowing attackers to read past buffer boundaries by supplying oversized per-sample lengths. Attackers can trigger out-of-bounds memory access by providing crafted sample length arrays that cause the native implementation to walk past the buffer allocation, resulting in JVM termination.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
luben zstd-jni 1.3.3-1 ~ 1.5.7-14 -

II. Public POCs for CVE-2026-87824

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III. Intelligence Information for CVE-2026-87824

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Patches & Fixes for CVE-2026-87824 (2)

Vendor Advisories for CVE-2026-87824 (2)

Proof of Concept for CVE-2026-87824 (1)

Vendor Pages for CVE-2026-87824 (1)

Same Patch Batch · luben · 2026-09-09 · 5 CVEs total

CVE-2026-87795 8.2 HIGH zstd-jni 1.2.0 through 1.5.7-13 Out-of-Bounds Read via ZstdDictCompress
CVE-2026-87823 8.2 HIGH zstd-jni 1.1.1 through 1.5.7-13 Out-of-Bounds Read via Direct ByteBuffer Frame-Size Method
CVE-2026-87877 7.7 HIGH zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free via Setters Called After close()
CVE-2026-87825 7.7 HIGH zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compression and Decompression Dictiona

IV. Related Vulnerabilities

Same product: zstd-jni
Same vendor: luben
Same weakness: CWE-125

V. Comments for CVE-2026-87824

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