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Vulnerabilities

Vulnerability · CVE-2026-87824

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-s

Published Sep 9, 2026 · catalog updated Oct 18, 2026 · zstd-jni before 1.5.7-14 fails

Check if you run it

No confirmed exploitation is on record for CVE-2026-87824. EPSS is 0.39%. Act only if a listed version of zstd-jni before 1.5.7-14 fails is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (zstd-jni before 1.5.7-14 fails).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.39%
Remediation
Advisory link
Affected products
Debian:12 zstd-jni-java · Debian:13 zstd-jni-java · Debian:14 zstd-jni-java

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 zstd-jni-java1.5.2-5+ds-3, 1.5.2-5+ds-4, 1.5.2-5+ds-5
  • Debian:13 zstd-jni-java1.5.2-5+ds-7, 1.5.2-5+ds-8, 1.5.4-2+ds-1
  • Debian:14 zstd-jni-java0 → 1.5.7-23+ds-1

How to fix CVE-2026-87824

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-87824. EPSS is 0.39%. Act only if a listed version of zstd-jni before 1.5.7-14 fails is installed.

Which versions are affected?

Compare what you have installed with 1.5.2-5+ds-3, 1.5.2-5+ds-4, 1.5.2-5+ds-5, 1.5.2-5+ds-7, 1.5.2-5+ds-8, 1.5.4-2+ds-1, 0 → 1.5.7-23+ds-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.39%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 9, 2026 · Trivy Vulnerability DB

    Detected

    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.

  2. Oct 18, 2026 · Trivy Vulnerability DB

    Fix available

    zstd-jni-java fixed in 1.5.7-23+ds-1

  3. Oct 18, 2026 · Trivy Vulnerability DB

    Fix available

    zstd-jni-java fixed in 1.5.7-23+ds-1

  4. Oct 18, 2026 · Trivy Vulnerability DB

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-87824

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-87824

    30-day exploitation probability 0.4%

    first.org
  • Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2026-87824

    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

    osv.dev

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.