Vulnerability-Lookup

UBUNTU-CVE-2026-111496 (CVE-2026-111496)

Vulnerability from osv_ubuntu – Published: 2026-10-29 00:00 – Updated: 2026-10-29 00:00 – Source website

Details

Kafka Streams derives its stream-time clock from record timestamps. PunctuationSchedule.next() computed the next punctuation time as timestamp + (intervalsMissed + 1) * interval with no overflow check. A record with a timestamp at or near Long.MAX_VALUE advances stream time to that value, so the next stream-time punctuation overflows to a negative time. PunctuationQueue then re-queues that time and loops on it indefinitely while holding a lock, stalling the StreamThread. Impact: A single record is enough. The affected StreamThread stops processing, and because the record stays in the topic the hang returns on restart; an application whose partitions are all affected becomes unresponsive. Only the Streams application is affected, not the brokers or the cluster. Triggering it needs write access to a source topic whose topology uses stream-time punctuation, and a broker that stores the record: brokers from Apache Kafka 4.0.0 reject such a timestamp by default (log.message.timestamp.after.max.ms, one hour), so it is reachable only on older brokers or where that bound has been relaxed. Mitigation: Upgrade Kafka Streams to 4.2.2, 4.3.2, or 4.4.0. As defense in depth, keep log.message.timestamp.after.max.ms bounded on source topics and restrict write access to them. Resolution: From Apache Kafka 4.2.2, 4.3.2, and 4.4.0: the next punctuation time is computed with overflow-checked arithmetic (clamped to Long.MAX_VALUE), and a rescheduled punctuation is re-queued only when its time moves forward.

Severity

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-111496	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-111496	REPORT
	https://kafka.apache.org/cve-list	REPORT
	http://www.openwall.com/lists/oss-security/2026/1…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "kafka",
            "binary_version": "2.2.2u1-0ubuntu1+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "kafka",
        "purl": "pkg:deb/ubuntu/kafka@2.2.2u1-0ubuntu1+esm2?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.0u2-0ubuntu3.1",
        "2.2.0u2-0ubuntu3.2",
        "2.2.2u1-0ubuntu1+esm2"
      ]
    }
  ],
  "aliases": [],
  "details": "Kafka Streams derives its stream-time clock from record timestamps. PunctuationSchedule.next()\u00a0computed the next punctuation time as timestamp + (intervalsMissed + 1) * interval with no\u00a0overflow check. A record with a timestamp at or near Long.MAX_VALUE advances stream time to that\u00a0value, so the next stream-time punctuation overflows to a negative time. PunctuationQueue then\u00a0re-queues that time and loops on it indefinitely while holding a lock, stalling the StreamThread. Impact: A single record is enough. The affected StreamThread stops processing, and because the record\u00a0stays in the topic the hang returns on restart; an application whose partitions are all affected\u00a0becomes unresponsive. Only the Streams application is affected, not the brokers or the cluster.\u00a0Triggering it needs write access to a source topic whose topology uses stream-time punctuation,\u00a0and a broker that stores the record: brokers from Apache Kafka 4.0.0 reject such a timestamp by\u00a0default (log.message.timestamp.after.max.ms, one hour), so it is reachable only on older brokers\u00a0or where that bound has been relaxed. Mitigation: Upgrade Kafka Streams to 4.2.2, 4.3.2, or 4.4.0. As defense in depth, keep\u00a0log.message.timestamp.after.max.ms bounded on source topics and restrict write access to them. Resolution: From Apache Kafka 4.2.2, 4.3.2, and 4.4.0: the next punctuation time is computed with\u00a0overflow-checked arithmetic (clamped to Long.MAX_VALUE), and a rescheduled punctuation is\u00a0re-queued only when its time moves forward.",
  "id": "UBUNTU-CVE-2026-111496",
  "modified": "2026-10-29T00:00:00Z",
  "published": "2026-10-29T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-111496"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-111496"
    },
    {
      "type": "REPORT",
      "url": "https://kafka.apache.org/cve-list"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/10/28/14"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-111496"
  ]
}

CVE-2026-111496 (GCVE-0-2026-111496)

Vulnerability from cvelistv5 – Published: 2026-10-28 16:45 – Updated: 2026-10-28 20:06

Title

Apache Kafka: Kafka Streams StreamThread hang from integer overflow in stream-time punctuation

Summary

Severity

No CVSS data available.

CWE

CWE-190 - Integer overflow or wraparound
CWE-835 - Loop with unreachable exit condition ('infinite loop')

Assigner

apache CNA under the mitre root

CNA scorecard B 76/100 over 1090 records in the last 180 days details

References

2 references

URL	Tags
https://kafka.apache.org/cve-list	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/1…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Kafka	Affected: 1.1.0 , ≤ 4.1.2 (semver) Affected: 4.2.0 , ≤ 4.2.1 (semver) Affected: 4.3.0 , ≤ 4.3.1 (semver)

Credits

Mike Read (GitHub: Michael-JRead) Matthias J. Sax <matthias@confluent.io>

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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.

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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.
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