NULL pointer dereference in Apache Traffic Server - CVE-2026-112381
Published: October 23, 2026
Vulnerability identifier: #VU157335
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-112381
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to crash Apache Traffic Server and cause a denial of service.
The vulnerability exists due to a null pointer dereference in Apache Traffic Server's net_write_io when a POST request is torn down through a half-close while a chunked origin response is reparsed from a reentrant write-ready callback. A remote attacker can time a POST connection half-close to trigger this race, crash the proxy, and cause a denial of service.
Affected software
Apache Traffic Server
How to mitigate CVE-2026-112381
Install security update from vendor's website.
Apache Traffic Server - addressed in versions 9.2.16, 10.1.5, 10.2.1