Bug 2533021

Summary: CVE-2026-90560 python-avro: zstd-jni: Denial of Service via out-of-bounds read in ZstdDictDecompress [fedora-all]
Product: [Fedora] Fedora Reporter: jkelly <jkelly>
Component: python-avroAssignee: dev
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: dev
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["8485cd84-4bb0-43b8-936a-0f1a21bc2ede"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-10-06 18:38:12 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2532604    

Description jkelly 2026-09-14 12:53:37 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

zstd-jni versions 1.2.0 through 1.5.7-13 contain an out-of-bounds read vulnerability in the ZstdDictDecompress constructor because offset and length arguments are never validated against the dictionary array bounds. Attackers can supply arbitrary offset or length values to read memory past the end of the supplied array, potentially causing JVM termination.
Comment 1 dev 2026-10-06 18:38:12 UTC 
Not affected. This is a zstd-jni vulnerability; zstd-jni is not included in the RPM.