EUVD-2026-75635
GHSA-h98q-h7vh-hjv2
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-delivered negative offset bypasses Java bounds check with no credentials or interaction; JVM crash yields A:H, partial memory leak C:L, no integrity impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
zstd-jni versions 1.5.5-6 through 1.5.7-13 contain an out-of-bounds read vulnerability in Zstd.getFrameContentSize that fails to validate negative srcPosition arguments. Attackers can supply negative offset values that bypass bounds checks and reach the native frame-header parser, causing out-of-bounds memory reads that lead to information disclosure or JVM crashes.
AnalysisAI
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 process crashes when processing attacker-controlled Zstd-compressed data. The Zstd.getFrameContentSize method and ZstdInputStreamNoFinalizer both fail to reject negative srcPosition and len arguments before marshalling them into the native Zstd frame-header parser, allowing a negative value to bypass Java-side bounds checks and trigger out-of-bounds reads in the underlying C layer. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The application must run zstd-jni versions 1.5.5-6 through 1.5.7-13 and must expose a code path where attacker-controlled values reach the `srcPosition` or `srcSize` parameters of `Zstd.getFrameContentSize(byte[] src, int srcPosition, int srcSize)`, or the `offset`/`len` parameters of `ZstdInputStreamNoFinalizer.read`. … 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/VA:H) accurately reflects a remotely exploitable, no-interaction flaw with high availability impact and limited confidentiality exposure - consistent with the dual outcomes of JVM crashes and partial memory leaks described in the advisory. … 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 tagged at https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14 and the corrective changes are in commit dd08685ef913a32e76fb27f43470035c06758646. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Java applications and services using zstd-jni to identify affected versions, and notify application owners of the vulnerability and urgent patching requirement. …
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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 1.2.0 through 1.5.7-13 exposes JVM-based applications to service termination and
Out-of-bounds memory reads in zstd-jni versions 1.1.1 through 1.5.7-13 allow unauthenticated remote attackers to crash t
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-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
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External POC / Exploit Code
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