Out-of-bounds Read Affecting net.jpountz.lz4:lz4 package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-NETJPOUNTZLZ4-14151790
- published30 Nov 2025
- disclosed28 Nov 2025
- creditJonas Konrad
Introduced: 28 Nov 2025
NewCVE-2025-12183 (opens in a new tab)How to fix?
There is no fixed version for net.jpountz.lz4:lz4.
Overview
net.jpountz.lz4:lz4 is a package for LZ4 compression for Java
Affected versions of this package are vulnerable to Out-of-bounds Read due to the use of the insecure LZ4_decompress_fast in the underlying lz4 library, which lacks bounds checks. An attacker can cause denial of service or access sensitive memory contents by providing specially crafted compressed input.
Workaround
- Applications using
LZ4Factory.nativeInstance()in conjunction with.fastDecompressor()can switch to.safeInstance()or.safeDecompressor(). - Applications using
LZ4Factory.unsafeInstance(),.fastestInstance()or.fastestJavaInstance()can switch to.safeInstance().
Notes
The official
org.lz4:lz4-javalibrary has not been patched and the project is discontinued.org.lz4:lz4-java:1.8.1relocates the pacakge toat.yawk.lz4:lz4-java, which is a community-maintained fork of the library that fixes this vulnerability.