Vulnerability-Lookup

CVE-2026-93572 (GCVE-0-2026-93572)

Vulnerability from cvelistv5 – Published: 2026-09-18 10:53 – Updated: 2026-09-18 20:09

Title

Io.netty/netty-codec-redis: netty: redisarrayaggregator nested resp headers multiply patched preallocation limits

Summary

A flaw was found in Netty's `RedisArrayAggregator` component. A remote attacker can exploit this vulnerability by sending specially crafted nested Redis (RESP) array headers. This can cause the `RedisArrayAggregator` to eagerly preallocate a large amount of heap memory, leading to heap memory exhaustion and a Denial of Service (DoS) for applications using `RedisDecoder` with `RedisArrayAggregator` on untrusted traffic.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-18 14:40 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

redhat redhat root

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-93572	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2536963	issue-trackingx_refsource_REDHAT

Impacted products

4 products

Vendor	Product	Version
Red Hat	Red Hat build of Apache Camel for Spring Boot 4	cpe:/a:redhat:camel_spring_boot:4
Red Hat	Red Hat Fuse 7	cpe:/a:redhat:jboss_fuse:7
Red Hat	Red Hat JBoss Enterprise Application Platform 7	cpe:/a:redhat:jboss_enterprise_application_platform:7
Red Hat	Red Hat Single Sign-On 7	cpe:/a:redhat:red_hat_single_sign_on:7

Date Public

2026-09-10 00:52

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-93572

Vulnerability from fkie_nvd - Published: 2026-09-18 11:17 - Updated: 2026-09-18 11:17

Severity

Summary

## Summary `RedisArrayAggregator` recently added `maxElements` and `maxNestedArrayDepth` limits to fix public Redis resource-exhaustion advisories. The limits are independent, but the allocator remains eager: every positive nested RESP array header creates `new ArrayList<RedisMessage>(length)` before any child element exists. With the default constructor, an attacker can send nested array headers with length `1,000,000` until the default nesting limit of `1024` is reached. This can reserve up to `1,024,000,000` child slots from roughly 12 KB of RESP input. This is backing capacity, not logical list size: `ArrayList(int)` constructs an empty list with the specified initial capacity. ## Technical Details Current `decodeRedisArrayHeader(...)` checks the two limits independently: ```java if (header.length() > maxElements) { throw new CodecException("this codec doesn't support longer length than " + maxElements); } if (depths.size() >= maxNestedArrayDepth) { releaseAndClearDepths(); throw new CodecException("max nested array depth exceeded: " + maxNestedArrayDepth); } depths.push(new AggregateState((int) header.length())); ``` `AggregateState` i

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-93572
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2536963

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-JMX3-M859-MRGC

Vulnerability from github – Published: 2026-09-18 12:31 – Updated: 2026-09-18 15:32

Details

Summary

RedisArrayAggregator recently added maxElements and maxNestedArrayDepth limits to fix public Redis resource-exhaustion advisories. The limits are independent, but the allocator remains eager: every positive nested RESP array header creates new ArrayList<RedisMessage>(length) before any child element exists.

With the default constructor, an attacker can send nested array headers with length 1,000,000 until the default nesting limit of 1024 is reached. This can reserve up to 1,024,000,000 child slots from roughly 12 KB of RESP input. This is backing capacity, not logical list size: ArrayList(int) constructs an empty list with the specified initial capacity.

Technical Details

Current decodeRedisArrayHeader(...) checks the two limits independently:

if (header.length() > maxElements) {
    throw new CodecException("this codec doesn't support longer length than " + maxElements);
}

if (depths.size() >= maxNestedArrayDepth) {
    releaseAndClearDepths();
    throw new CodecException("max nested array depth exceeded: "  + maxNestedArrayDepth);
}
depths.push(new AggregateState((int) header.length()));

AggregateState i

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-93572"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-18T11:17:21Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\n`RedisArrayAggregator` recently added `maxElements` and `maxNestedArrayDepth` limits to fix public Redis resource-exhaustion advisories. The limits are independent, but the allocator remains eager: every positive nested RESP array header creates `new ArrayList\u003cRedisMessage\u003e(length)` before any child element exists.\n\nWith the default constructor, an attacker can send nested array headers with length `1,000,000` until the default nesting limit of `1024` is reached. This can reserve up to `1,024,000,000` child slots from roughly 12 KB of RESP input. This is backing capacity, not logical list size: `ArrayList(int)` constructs an empty list with the specified initial capacity.\n\n## Technical Details\n\nCurrent `decodeRedisArrayHeader(...)` checks the two limits independently:\n\n```java\nif (header.length() \u003e maxElements) {\n    throw new CodecException(\"this codec doesn\u0027t support longer length than \" + maxElements);\n}\n\nif (depths.size() \u003e= maxNestedArrayDepth) {\n    releaseAndClearDepths();\n    throw new CodecException(\"max nested array depth exceeded: \"  + maxNestedArrayDepth);\n}\ndepths.push(new AggregateState((int) header.length()));\n```\n\n`AggregateState` i",
  "id": "GHSA-jmx3-m859-mrgc",
  "modified": "2026-09-18T15:32:15Z",
  "published": "2026-09-18T12:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93572"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-93572"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2536963"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-93572 (GCVE-0-2026-93572)

FKIE_CVE-2026-93572

GHSA-JMX3-M859-MRGC

Summary

Technical Details

Tags

Sightings

Nomenclature

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