CVE-2026-64609

Out-of-bounds read via sun.misc.Unsafe in Apache Fory. When out-of-band zero-copy deserialization is used, readAlignedVarUint() can read beyond the bounds of the underlying buffer. Out-of-band zero-copy deserialization is an opt-in feature; applications that do not use it are not affected. This issue affects Apache Fory (formerly Apache Fury): from 0.5.0 before 1.4.0. Versions before 0.11.0 were published under the Maven coordinates org.apache.fury:fury-core. Users are recommended to upgrade to version 1.4.0, which fixes the issue.

Score

CVSS 3.1 9.1 Critical

Status

Analyzed - security@apache.org

Published

2026-07-21

Last modified

2026-10-24

Weaknesses

CWE-125

Affected products

• Fory (Apache)
• Apache Fory (Apache Software Foundation)

References

• https://lists.apache.org/thread/rdv22ks3b0cxh0r52w3ghxgkxqso3f1b
• http://www.openwall.com/lists/oss-security/2026/07/21/6