Paper/Archive/CVE-2026-64609

CVE-2026-64609

Apache Software Foundation Apache Fory — Apache Fory, Apache Fory: Out-of-Bounds Read via sun.misc.Unsafe in zero-copy java deserialization

EPSS 0.8%CVSS 9.1

critical.is priorityof 100

CVSS 9.1 (ADP)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 55.9.559 × 2011.2 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Apache Fory0.11.0 – < 1.4.01.4.0CNA

Apache Fory0.5.0 – < 0.11.00.11.0CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

advisorylists.apache.org/thread/rdv22ks3b0cxh0r52w3ghxgkxqso3f1b refopenwall.com/lists/oss-security/2026/07/21/6