Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Fory | >= 0.5.0, < 1.4.0 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/thread/rdv22ks3b0cxh0r52w3ghxgkxqso3f1bVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/07/21/6Third Party Advisory
FAQ
What is CVE-2026-64609?
CVE-2026-64609 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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-co...
How severe is CVE-2026-64609?
CVE-2026-64609 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-64609?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Fory.