CVE-2026-64609 Details
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.
A vulnerability allowing out-of-bounds read has been identified in Apache Fory versions 0.5.0 prior to 1.4.0, specifically in the 'fury-core' Maven coordinates. This issue arises from the use of 'sun.misc.Unsafe' in out-of-band zero-copy deserialization, an opt-in feature. When this feature is enabled, the 'readAlignedVarUint()' method can read beyond the limits of the underlying buffer, potentially leading to unauthorized memory access. Applications not utilizing this deserialization method are not affected.
Users are advised to upgrade to Apache Fory version 1.4.0, which addresses this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 21, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2026/07/21/6 | CVE | Third Party Advisory |
| https://lists.apache.org/thread/rdv22ks3b0cxh0r52w3ghxgkxqso3f1b | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| apache fory | >= 0.5.0, < 1.4.0 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 27, 2026 | Initial Analysis | [email protected] |
| Jul 21, 2026 | CVE Modified | CVE |
| Jul 21, 2026 | CVE Modified | CISA-ADP |
| Jul 21, 2026 | New CVE Received | [email protected] |