Security Bulletin:Multiple vulnerabilities in lz4-java may affect IBM Infosphere Change Data Capture (CVE-2026-106449, CVE-2026-106450, CVE-2026-106451)

Summary Multiple security vulnerabilities have been identified in lz4-java, Java bindings and pure Java implementations of LZ4 and XXHash. lz4-java is used by IBM Infosphere Change Data Capture. IBM has addressed these vulnerabilities. Refer to the "Remediation/Fixes" section below for remediatio...

EUVD-2026-93862

yawkat LZ4 Java: LZ4BlockInputStream with stopOnEmptyBlock=false recurses once per empty block, causing StackOverflowError...

GHSA-343H-94H5-C4WR yawkat LZ4 Java: LZ4BlockInputStream with stopOnEmptyBlock=false recurses once per empty block, causing StackOverflowError

Summary When LZ4BlockInputStream is configured with stopOnEmptyBlock = false the mode for reading concatenated block streams, it handles each empty block by calling refill recursively. A long run of empty blocks exhausts the thread stack and throws StackOverflowError out of read or skip. Details ...

yawkat LZ4 Java: LZ4BlockInputStream with stopOnEmptyBlock=false recurses once per empty block, causing StackOverflowError

Summary When LZ4BlockInputStream is configured with stopOnEmptyBlock = false the mode for reading concatenated block streams, it handles each empty block by calling refill recursively. A long run of empty blocks exhausts the thread stack and throws StackOverflowError out of read or skip. Details ...

Memory Allocation with Excessive Size Value

Overview Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value via the LZ4BlockInputStream process. An attacker can cause excessive memory allocation and exhaust system resources by supplying a crafted legacy LZ4Block stream with a large compressedLen val...

GHSA-4V53-57PG-C464 yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header

Summary LZ4BlockInputStream grows its compressed-input buffer to the attacker-controlled compressedLen value from the legacy LZ4Block stream header before reading any payload bytes. A header-only input can therefore trigger a near-2 GiB allocation and exhaust the JVM heap. Details In...

yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header

Summary LZ4BlockInputStream grows its compressed-input buffer to the attacker-controlled compressedLen value from the legacy LZ4Block stream header before reading any payload bytes. A header-only input can therefore trigger a near-2 GiB allocation and exhaust the JVM heap. Details In...

Memory Allocation with Excessive Size Value

Overview org.lz4:lz4-java is a Java port of the LZ4 compression algorithm and the xxHash hashing algorithm. Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value via the LZ4BlockInputStream process. An attacker can cause excessive memory allocation and...

EUVD-2026-93871

yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header...

yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header

LZ4BlockInputStream grows its compressed-input buffer to the attacker-controlled compressedLen value from the legacy LZ4Block stream header before reading any payload bytes. A header-only input can therefore trigger a near-2 GiB allocation and exhaust the JVM heap...

yawkat LZ4 Java: LZ4BlockInputStream with stopOnEmptyBlock=false recurses once per empty block, causing StackOverflowError

When LZ4BlockInputStream is configured with stopOnEmptyBlock = false the mode for reading concatenated block streams, it handles each empty block by calling refill recursively. A long run of empty blocks exhausts the thread stack and throws StackOverflowError out of read or skip...

Linux Distros Unpatched Vulnerability : CVE-2026-106449

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.4, net.jpountz.lz4.LZ4BlockInputStream configured with stopOnEmptyBlock set to false handles ea...

CVE-2026-106452

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data,...

DEBIAN-CVE-2026-106452

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data,...

CVE-2026-106449

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.4, net.jpountz.lz4.LZ4BlockInputStream configured with stopOnEmptyBlock set to false handles each well-formed empty LZ4Block by recursively calling refill, allowing a long sequence of empty blocks in an attacker-controlled compresse...

DEBIAN-CVE-2026-106449

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.4, net.jpountz.lz4.LZ4BlockInputStream configured with stopOnEmptyBlock set to false handles each well-formed empty LZ4Block by recursively calling refill, allowing a long sequence of empty blocks in an attacker-controlled compresse...

CVE-2026-106452 yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data,...

CVE-2026-106452 yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data,...

CVE-2026-106452 yawkat LZ4 Java: LZ4BlockInputStream allocates an unvalidated compressed length from the stream header

yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.2, net.jpountz.lz4.LZ4BlockInputStream refill validates that the compressedLen field in a legacy LZ4Block header is nonnegative but allocates a compressed-input buffer of that attacker-controlled size before reading payload data,...

CVE-2026-106452

The yawkat LZ4 Java library (prior to version 1.11.2 ) is vulnerable to a heap exhaustion issue in the net.jpountz.lz4.LZ4BlockInputStream.refill() function. The vulnerability occurs because the application validates that the compressedLen field in a legacy LZ4Block header is nonnegative but fail...