EUVD-2026-75021
GHSA-cm3p-487m-cmvq
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable, no auth required to submit compressed data; high availability from JVM crash; limited confidentiality from OOB read; no integrity impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Out-of-bounds memory reads in zstd-jni versions 1.1.1 through 1.5.7-13 allow unauthenticated remote attackers to crash the JVM or extract arbitrary frame-size data from unintended memory regions by supplying crafted Zstandard-compressed input with negative or integer-overflowing offset values. Three JNI native methods - findDirectByteBufferFrame, decompressedDirectByteBuffer, and getDirectByteBufferFrame - perform 32-bit signed bounds checks without first validating that src_offset or src_size are non-negative, allowing values near Integer.MIN_VALUE to pass the comparison and drive native code to read unmapped memory. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The application must invoke one of three specific direct-ByteBuffer JNI methods: findDirectByteBufferFrame, decompressedDirectByteBuffer (size query), or getDirectByteBufferFrame (count query) on input controlled by the attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H) reflects real-world risk accurately: network-reachable applications that accept and decompress zstd-compressed data using direct ByteBuffer APIs are exploitable without authentication or user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade zstd-jni to version 1.5.7-14 or later, confirmed at https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14 with patches applied in commits d7a1c99322d5e1fc71932e722c0b5bb2fc525d3f and 46dcb2a54c8b8f2ce2cad7187a7513f509c533ac. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all applications and build systems using zstd-jni (check dependency manifests, build artifacts, and running JVM processes); assess whether vulnerable versions handle compressed data from untrusted network sources. …
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Out-of-bounds read in zstd-jni versions 1.2.0 through 1.5.7-13 allows attackers who can supply dictionary constructor pa
Out-of-bounds read in zstd-jni versions 1.5.5-6 through 1.5.7-13 exposes JVM-based applications to memory disclosure or
Out-of-bounds memory access in zstd-jni versions 1.3.3-1 through 1.5.7-13 enables unauthenticated network-accessible att
Use-after-free in zstd-jni versions 1.3.8-4 through 1.5.7-13 allows callers to invoke setDict, setLongMax, setLevel, and
Use-after-free in zstd-jni versions 1.3.8-4 through 1.5.7-13 allows attackers to trigger silent data corruption or JVM c
Infinite-loop denial of service in zstd-jni versions 1.4.8-4 through 1.5.7-13 allows thread starvation by passing negati
Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today