EUVD-2026-75022
GHSA-v36p-vv44-8qfg
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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
OOB read causes JVM crash (A:H) with no confidentiality or integrity impact; network-reachable without auth via exposed dictionary-training API.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
6DescriptionCVE.org
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.
AnalysisAI
Out-of-bounds memory access in zstd-jni versions 1.3.3-1 through 1.5.7-13 enables unauthenticated network-accessible attackers to crash the JVM by supplying crafted sample-size arrays to the Zstd.trainFromBufferDirect dictionary-training API. The native C implementation (jni_zdict.c) failed to sum caller-supplied sample lengths against the DirectBuffer's actual capacity before iterating, allowing the native code to walk past the buffer allocation boundary and trigger a hard JVM termination. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target application calls Zstd.trainFromBufferDirect (or the underlying native trainFromBufferDirect0) with a sampleSizes array that is fully or partially controlled by the attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.7 (AV:N/AC:L/AT:N/PR:N/UI:N/VA:H) reflects the severity of a remotely triggerable JVM crash with no authentication barrier. … 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; the patched release is available at https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14 and is documented in security advisory GHSA-257p-3h6w-pg7h. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify all applications and services running zstd-jni versions 1.3.3-1 through 1.5.7-13 and document network exposure. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
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 reads in zstd-jni versions 1.1.1 through 1.5.7-13 allow unauthenticated remote attackers to crash t
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-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
Leaving vuln.today