CVE-2026-122322

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{"bugzilla": {"description": "github.com/kyverno/kyverno: kyverno: Denial of Service via unbounded decompression of attestation layers", "id": "2567683", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567683"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-409", "details": ["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.", "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."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-122322", "public_date": "2026-11-05T02:25:20Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-122322\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-122322\nhttps://github.com/kyverno/kyverno/security/advisories/GHSA-3f2c-hfj8-542w\nhttps://www.vulncheck.com/advisories/kyverno-from-1.11.0-before-1.19.2-memory-exhaustion-via-notary-attestation-decompression"], "statement": "This vulnerability is rated as Important because an unauthenticated remote actor capable of publishing artifacts to an image registry can trigger an out-of-memory crash of the admission controller, resulting in a cluster-wide disruption of workload admission. Exploitation requires the cluster to run policy configurations that inspect container image attestations against registries hosting malicious, highly compressed payloads. Standard Red Hat OpenShift deployments do not bundle Kyverno by default and rely on alternative policy frameworks, limiting exposure to environments where this component was specifically deployed.", "threat_severity": "Important"}

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