cvedb.io
CVE-2021-43980
LOW · CVSS 3.7
EPSS exploitation probability: 0%
Published 2022-09-28T14:15:09.880 · Last modified 2026-06-17T04:11:44.097

Summary

The simplified implementation of blocking reads and writes introduced in Tomcat 10 and back-ported to Tomcat 9.0.47 onwards exposed a long standing (but extremely hard to trigger) concurrency bug in Apache Tomcat 10.1.0 to 10.1.0-M12, 10.0.0-M1 to 10.0.18, 9.0.0-M1 to 9.0.60 and 8.5.0 to 8.5.77 that could cause client connections to share an Http11Processor instance resulting in responses, or part responses, to be received by the wrong client.

Affected products

apache — tomcat

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.