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CVE-2019-9513

Published: August 31, 2023Last modified: July 22, 2025

Description

Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service. The attacker creates multiple request streams and continually shuffles the priority of the streams in a way that causes substantial churn to the priority tree. This can consume excess CPU.

Severity score breakdown

ParameterValue
Base score7.5
Attack VectorNETWORK
Attack complexityLOW
Privileges requiredNONE
User interactionNONE
ScopeUNCHANGED
ConfidentialityNONE
Integrity impactNONE
Availability impactHIGH
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Status

ProductReleasePackageStatus
Alpaquita Linux23 LTSnghttp2Not affected (1.51.0-r1)
nginxNot affected (1.22.1-r0)
nodejsNot affected (18.17.1-r0)
Streamnghttp2Not affected (1.55.1-r0)
nginxNot affected (1.24.0-r11)
nodejsNot affected (18.17.1-r0)
Hardened Containers23 LTSnghttp2Not affected (1.51.0-r1)
Streamnghttp2Not affected (1.55.1-r0)

References

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