yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.4, net.jpountz.lz4.LZ4FrameInputStream readHeader() allocates two new 4 MiB block buffers whenever a maximum-block-size frame header is read, and the default concatenated-frame mode allows attacker-controlled streams containing many minimal empty frames to trigger roughly 8 MiB of allocation for every 11 input bytes. The stream produces no decompressed output while consuming CPU and garbage-collection time, so decompressed-size limits do not mitigate the issue; readSingleFrame mode is not affected. This issue is fixed in version 1.11.4.
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History
Fri, 09 Oct 2026 02:30:00 +0000
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ssvc
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Wed, 07 Oct 2026 12:30:00 +0000
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threat_severity
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Yawkat
Yawkat lz4-java |
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Yawkat
Yawkat lz4-java |
Tue, 06 Oct 2026 20:00:00 +0000
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| Description | yawkat LZ4 Java provides LZ4 compression for Java. Prior to 1.11.4, net.jpountz.lz4.LZ4FrameInputStream readHeader() allocates two new 4 MiB block buffers whenever a maximum-block-size frame header is read, and the default concatenated-frame mode allows attacker-controlled streams containing many minimal empty frames to trigger roughly 8 MiB of allocation for every 11 input bytes. The stream produces no decompressed output while consuming CPU and garbage-collection time, so decompressed-size limits do not mitigate the issue; readSingleFrame mode is not affected. This issue is fixed in version 1.11.4. | |
| Title | yawkat LZ4 Java: LZ4FrameInputStream reallocates block buffers for every frame, allowing CPU and GC amplification from small inputs | |
| Weaknesses | CWE-770 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-10-06T19:48:40.092Z
Updated: 2026-10-09T01:44:37.343Z
Reserved: 2026-10-06T16:49:40.591Z
Link: CVE-2026-106450
Updated: 2026-10-09T01:44:33.103Z
Status : Awaiting Analysis
Published: 2026-10-06T20:17:27.037
Modified: 2026-10-09T02:16:59.843
Link: CVE-2026-106450