CVE-2026-87795: Out-of-bounds Read in luben zstd-jni
zstd-jni versions before 1.5.7-14 fail to validate offset and length parameters in the ZstdDictCompress constructor, allowing out-of-bounds memory reads. Attackers can supply untrusted offset or length values to read native heap memory into the compression dictionary, typically causing JVM crashes.
AI Analysis
Technical Summary
The vulnerability in zstd-jni before version 1.5.7-14 arises from a failure to validate offset and length parameters passed to the ZstdDictCompress constructor. This improper validation enables out-of-bounds memory reads from the native heap into the compression dictionary. The issue can be triggered by supplying untrusted offset or length values, leading to JVM instability or crashes. The CVSS 4.0 base score is 8.8, reflecting a network attack vector with no privileges or user interaction required, and a high impact on availability due to JVM crashes.
Potential Impact
Exploitation of this vulnerability can cause the Java Virtual Machine to crash due to out-of-bounds memory reads. This impacts the availability of applications using the affected zstd-jni versions. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid using untrusted input for offset and length parameters in the ZstdDictCompress constructor. Monitor vendor communications for updates on patches or mitigations.
CVE-2026-87795: Out-of-bounds Read in luben zstd-jni
Description
zstd-jni versions before 1.5.7-14 fail to validate offset and length parameters in the ZstdDictCompress constructor, allowing out-of-bounds memory reads. Attackers can supply untrusted offset or length values to read native heap memory into the compression dictionary, typically causing JVM crashes.
CVSS v4.0
Score 8.8high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in zstd-jni before version 1.5.7-14 arises from a failure to validate offset and length parameters passed to the ZstdDictCompress constructor. This improper validation enables out-of-bounds memory reads from the native heap into the compression dictionary. The issue can be triggered by supplying untrusted offset or length values, leading to JVM instability or crashes. The CVSS 4.0 base score is 8.8, reflecting a network attack vector with no privileges or user interaction required, and a high impact on availability due to JVM crashes.
Potential Impact
Exploitation of this vulnerability can cause the Java Virtual Machine to crash due to out-of-bounds memory reads. This impacts the availability of applications using the affected zstd-jni versions. There is no indication of confidentiality or integrity impact. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, avoid using untrusted input for offset and length parameters in the ZstdDictCompress constructor. Monitor vendor communications for updates on patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-09T09:37:58.558Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa1338aacd9273b49275311
Added to database: 09/09/2026, 10:23:06 UTC
Last enriched: 09/09/2026, 10:37:12 UTC
Last updated: 09/09/2026, 11:06:33 UTC
Views: 6
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