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TI-2026-59940 Aliases CVE-2026-87823GHSA-cm3p-487m-cmvq

zstd-jni 1.1.1 through 1.5.7-13 Out-of-Bounds Read via Direct ByteBuffer Frame-Size Methods

Priority HIGH 77CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · None · High
Fix status
Partial Red Hat: 2 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

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 Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00432 37th percentileScored 2026-11-07
Fix Partial zstd-jni (luben): 1.5.7-14Red Hat: 2 advisoriesRed Hat: 2 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
lubenzstd-jni1.1.1 to before 1.5.7-141.5.7-14Patch availableCNA
  • zstd-jni Vendorluben Affected 1.1.1 to before 1.5.7-14 Fixed in 1.5.7-14 Patch available CNA

Remediation

  • Fix · CNA zstd-jni (luben) Fixed in 1.5.7-14

Red Hat 2 advisories

  • RHSA-2026:69440 Released 2026-09-21 · Red Hat rating Important
    Red Hat build of Quarkus 3.33.3.SP2 release and security update
    • Red Hat build of Quarkus 3.33.3.SP2
  • RHSA-2026:69470 Released 2026-09-21 · Red Hat rating Important
    Red Hat build of Quarkus 3.27.5.SP2 release and security update
    • Red Hat build of Quarkus 3.27.5.SP2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    luben zstd-jni 1.5.7-14

    5 records Highest priority Priority HIGH 3 HIGH, 2 MEDIUM

    Other records, highest priority first

    • TI-2026-59916 zstd-jni 1.2.0 through 1.5.7-13 Out-of-Bounds Read via ZstdDictCompressPriority HIGH 77
    • TI-2026-59963 zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free via Setters Called After close()Priority HIGH 66
    • TI-2026-59942 zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compression and Decompression DictionariesPriority MEDIUM 64
    Show all 5 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Ceph Storage 9AffectedNo fix yet: Fix deferred
Red Hat build of Quarkus 3.27.5.SP2Fixed RHSA-2026:69470
Red Hat build of Quarkus 3.33.3.SP2Fixed RHSA-2026:69440
Not affected: 13 products
  • Exploit Intelligence
  • OpenShift Developer Tools and Services
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Fuse 7
  • Red Hat Hardened Images
  • Red Hat JBoss Enterprise Application Platform 8
  • Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat build of Apache Camel 4 for Quarkus 3
  • Red Hat build of Apache Camel for Spring Boot 4
  • Red Hat build of Apicurio Registry 3
  • Red Hat build of Debezium 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-87823
  2. 2026-10-03 Alias added: GHSA-cm3p-487m-cmvq
  3. 2026-10-09 Fix available: RHSA-2026:69440 · Red Hat
  4. 2026-10-09 Fix available: RHSA-2026:69470 · Red Hat
  5. 2026-10-10 Fix available: Red Hat build of Quarkus 3.27.5.SP2, Red Hat build of Quarkus 3.33.3.SP2 · Red Hat

References

Patch 2

Advisory 1

Other 4

  • TI-2026-61574 zstd-jni 1.2.0 through 1.5.7-13 Out-of-Bounds Read via ZstdDictDecompress CVSS 4.0HIGH 8.8
  • TI-2026-60350 zstd-jni 1.5.5-6 through 1.5.7-13 Out-of-Bounds Read via Negative Offset CVSS 4.0HIGH 8.8
  • TI-2026-59916 zstd-jni 1.2.0 through 1.5.7-13 Out-of-Bounds Read via ZstdDictCompress CVSS 4.0HIGH 8.8
  • TI-2026-61747 luben zstd-jni Dictionary Sharing ZstdCompressCtx.java ZstdCompressCtx.loadDict use after free CVSS 4.0MEDIUM 6.9
  • TI-2026-59963 zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free via Setters Called After close() CVSS 4.0HIGH 7.0
  • TI-2026-59942 zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compression and Decompression Dictionaries CVSS 4.0HIGH 7.0
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences