CVE-2020-11993

HIGH
7.5
CVSS Score
Published: August 7, 2020 at 03:32 PM UTC
Updated: June 17, 2026 at 02:51 AM UTC
13 products affected across 7 vendorsDebian LinuxFedoraUbuntu Linux

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Severity
HIGH7.5
Exploit prediction
EPSS 56%

Description

Apache HTTP Server versions 2.4.20 to 2.4.43 When trace/debug was enabled for the HTTP/2 module and on certain traffic edge patterns, logging statements were made on the wrong connection, causing concurrent use of memory pools. Configuring the LogLevel of mod_http2 above "info" will mitigate this vulnerability for unpatched servers.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.4.20 ≤ v ≤ 2.4.432.4.20 ≤ v < 2.4.44
Affected range stops below 2.4.44, so it looks safe — our inference, not a vendor statement
8.2.0 ≤ v ≤ 8.2.2
8.2.0 ≤ v ≤ 8.2.2

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-444

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