CVE-2019-10082
httpd: read-after-free in h2 connection shutdown
Severity
ModerateRed Hat Product Security
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 · 6.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CWE not specified