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CVE-2026-87824

zstd-jni 1.3.3-1 through 1.5.7-13 Out-of-Bounds Read via Zstd.trainFromBufferDirect

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.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Luben
Products
Zstd-jni
CVE-2026-90852

luben zstd-jni Dictionary Sharing ZstdCompressCtx.java ZstdCompressCtx.loadDict use after free

A vulnerability has been found in luben zstd-jni up to 1.5.7-13. This vulnerability affects the function ZstdCompressCtx.loadDict of the file ZstdCompressCtx.java of the component Dictionary Sharing. Such manipulation leads to use after free. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.5.7-14 is able to resolve this issue. The name of the patch is a560131d7834598afd9cea6b7c107bc88e915936. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Luben
Products
Zstd-jni
CVE-2026-89045

zstd-jni 1.4.8-4 through 1.5.7-13 Denial of Service via Negative Length

zstd-jni versions 1.4.8-4 through 1.5.7-13 fail to validate negative length parameters in ZstdInputStreamNoFinalizer.read(), allowing attackers to trigger infinite loops. Attackers can pass negative length values to cause the read method to spin indefinitely while holding the stream monitor, blocking all other threads from accessing the stream.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Luben
Products
Zstd-jni
CVE-2026-90560

zstd-jni 1.2.0 through 1.5.7-13 Out-of-Bounds Read via ZstdDictDecompress

zstd-jni versions 1.2.0 through 1.5.7-13 contain an out-of-bounds read vulnerability in the ZstdDictDecompress constructor because offset and length arguments are never validated against the dictionary array bounds. Attackers can supply arbitrary offset or length values to read memory past the end of the supplied array, potentially causing JVM termination.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Luben
Products
Zstd-jni
CVE-2026-87825

zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compression and Decompression Dictionaries

zstd-jni before 1.5.7-14 contains a use-after-free vulnerability where streams and contexts hold a dictionary's shared lock only during the load call, allowing the dictionary to be closed while still referenced. Attackers can close a dictionary after associating it with a stream or context, causing subsequent read or write operations to access freed native memory, resulting in silent data corruption or JVM crashes.

CVSS 4.0 · 7 High EPSS < 1% KEV · Not listed
Vendors
Luben
Products
Zstd-jni
CVE-2026-87795

zstd-jni 1.2.0 through 1.5.7-13 Out-of-Bounds Read via ZstdDictCompress

zstd-jni versions before 1.5.7-14 fail to validate offset and length parameters in the ZstdDictCompress constructor, allowing out-of-bounds memory reads. Attackers can supply untrusted offset or length values to read native heap memory into the compression dictionary, typically causing JVM crashes.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Luben
Products
Zstd-jni
CVE-2026-89046

zstd-jni 1.5.5-6 through 1.5.7-13 Out-of-Bounds Read via Negative Offset

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.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Luben
Products
Zstd-jni
CVE-2026-87823

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

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.

CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Luben
Products
Zstd-jni
CVE-2026-87877

zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free via Setters Called After close()

zstd-jni versions before 1.5.7-14 fail to validate closed state in setDict, setLongMax, setLevel and setRefMultipleDDicts methods of stream classes. Attackers can call these methods on closed streams to write through freed native pointers, corrupting unrelated objects or crashing the JVM.

CVSS 4.0 · 7 High EPSS < 1% KEV · Not listed
Vendors
Luben
Products
Zstd-jni