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CVE-2017-9789

httpd: Read after free in mod_http2

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Severity

Important

Red Hat Product Security

6.5

CVSS 3.0

Review impact separately from score.

Published · July 11, 2017

Updated · August 5, 2026

Description

When under stress, closing many connections, the HTTP/2 handling code in Apache httpd 2.4.26 would sometimes access memory after it has been freed, resulting in potentially erratic behaviour.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 6.5
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

CWE-416 · Use After Free