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CVE-2019-10082

httpd: read-after-free in h2 connection shutdown

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Severity

Moderate

Red Hat Product Security

6.5

CVSS 3.0

Review impact separately from score.

Published · August 14, 2019

Updated · September 21, 2026

Description

A read-after-free vulnerability was discovered in Apache httpd, in mod_http2. A specially crafted http/2 client session could cause the server to read memory that was previously freed during connection shutdown, potentially leading to a crash.

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

This flaw is only exploitable if Apache httpd is configured to respond to HTTP/2 requests, which is done by including "h2" or "h2c" in the "Protocols" list in a configuration file. The following command can be used to search for possible vulnerable configurations:

grep -R '^\s*Protocols\>.*\<h2\>' /etc/httpd/

See https://httpd.apache.org/docs/2.4/mod/mod_http2.html

CVSS / CWE

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

CWE not specified