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CVE details

CVE-2026-111496

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.

Score
–
Published
2026-10-28
Links
NVD · cve.org · Report wrong data

Matched ports (1)

PortPackageVersionStatusMaintainer
net/kafkakafka4.3.1unaddressedtimp87@gmail.com

Template for a VuXML entry

This generator is not reliable at the moment

Package names, ranges and the XML itself can be wrong. Always check the content before you commit it, and run make validate in security/vuxml. The generator is being rewritten from scratch.

Range per package from the CVE record, for ports with a version line in their name (python312) only from that line. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>kafka</name>
	<!-- no fixed version in the CVE record -->
	<range><lt>FIXME</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>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.</p>
	<p>Impact:</p>
	<p>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.</p>
	<p>Mitigation:</p>
	<p>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.</p>
	<p>Resolution:</p>
	<p>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.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-111496</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-111496</url>
    </references>
    <dates>
      <discovery>2026-10-28</discovery>
      <entry>2026-10-28</entry>
    </dates>
  </vuln>