Uncontrolled Recursion in lz4-java - #VU153028
Published: September 30, 2026
Vulnerability identifier: #VU153028
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled recursion in net.jpountz.lz4.LZ4BlockInputStream.refill() when processing consecutive empty blocks in LZ4Block streams with stopOnEmptyBlock set to false. A remote attacker can supply a stream containing a long run of empty blocks to cause a denial of service.
The default stopOnEmptyBlock=true configuration is not affected.
Affected software
lz4-java
Remediation
Install security update from vendor's website.
lz4-java - update to 1.11.4