Bug 2567683 (CVE-2026-122322)

Summary: CVE-2026-122322 github.com/kyverno/kyverno: kyverno: Denial of Service via unbounded decompression of attestation layers
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: gbenhaim, niyer, twaugh
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Kyverno. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by exhausting system memory. By supplying specially crafted, highly compressed attestation layers in container registry artifacts, an attacker triggers unbounded decompression within the admission controller. This leads to excessive memory consumption, causing the controller process to crash and disrupting admission control operations.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-11-05 22:17:49 UTC
Kyverno from 1.11.0 before 1.19.2 contains an unbounded decompression vulnerability in extractStatement that allows remote attackers to exhaust memory by supplying highly compressed attestation layers. Attackers controlling registry referrer artifacts can push gzip predicate layers exceeding maxPayloadSize when decompressed, causing admission controller OOM kills and denial of service.