CVE-2026-112381 – Apache Traffic Server: Nullptr dereference in net_write_io on a POST half-close with chunked response

​CVE ID :CVE-2026-112381

Published : Oct. 21, 2026, 7:20 p.m. | 20 minutes ago

Description :Apache Traffic Server can crash with a null pointer dereference when a client POST request is torn down via half-close while a chunked origin response is being reparsed from a reentrant write-ready callback, a timing-dependent race introduced by the CVE-2021-32564 flow-control backports.

This issue affects Apache Traffic Server: 9.2.15, 10.1.4, 10.2.0.

Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.

Severity: 8.2 | HIGH

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