CVE Explorer

CVE-2026-35554

A race condition in the Apache Kafka Java producer client’s buffer pool management can cause messages to be silently delivered to incorrect topics. When a produce batch expires due to delivery.timeout.ms while a network request containing that batch is still in flight, the batch’s ByteBuffer is prematurely deallocated and returned to the buffer pool. If a subsequent producer batch—potentially destined for a different topic—reuses this freed buffer before the original network request completes,

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8b25ce2df486e6af85b6cd1b9d8f25a0588bccef7f91c11767f45ed1e0c2129f

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-362","description":"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:70d590ea6d914c66a6c2d6864aceef225f9010f95c3367049c9b90a395a9c9ea · sha256:1b85020b71c4661a… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-416","description":"CWE-416 Use After Free","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:70d590ea6d914c66a6c2d6864aceef225f9010f95c3367049c9b90a395a9c9ea · sha256:1b85020b71c4661a… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"org.apache.kafka:kafka-clients","product":"Apache Kafka Clients","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"3.9.1","status":"affected","version":"2.8.0","versionType":"semver"},{"lessThanOrEqual":"4.0.1","status":"affected","version":"4.0.0","versionType":"semver"},{"lessThanOrEqual":"4.1.1","status":"affected","version":"4.1.0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:70d590ea6d914c66a6c2d6864aceef225f9010f95c3367049c9b90a395a9c9ea · sha256:1b85020b71c4661a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:70d590ea6d914c66a6c2d6864aceef225f9010f95c3367049c9b90a395a9c9ea · sha256:1b85020b71c4661a… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-362","description":"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:70d590ea6d914c66a6c2d6864aceef225f9010f95c3367049c9b90a395a9c9ea · sha256:1b85020b71c4661a… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-416","description":"CWE-416 Use After Free","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:70d590ea6d914c66a6c2d6864aceef225f9010f95c3367049c9b90a395a9c9ea · sha256:1b85020b71c4661a… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions

{"url":"http://www.openwall.com/lists/oss-security/2026/04/07/6"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:70d590ea6d914c66a6c2d6864aceef225f9010f95c3367049c9b90a395a9c9ea · sha256:1b85020b71c4661a… · /containers/adp/1/references/0

{"tags":["issue-tracking"],"url":"https://issues.apache.org/jira/browse/KAFKA-19012"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:70d590ea6d914c66a6c2d6864aceef225f9010f95c3367049c9b90a395a9c9ea · sha256:1b85020b71c4661a… · /containers/cna/references/0

{"tags":["mailing-list","vendor-advisory"],"url":"https://lists.apache.org/thread/f07x7j8ovyqhjd1to25jsnqbm6wj01d6"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:70d590ea6d914c66a6c2d6864aceef225f9010f95c3367049c9b90a395a9c9ea · sha256:1b85020b71c4661a… · /containers/cna/references/1

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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