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CVE-2025-54939

Published: Aug 1, 2025Updated: Aug 27, 2025 Sources: CVE List NVDCWE-770
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.8%
Top 49.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-770CWE-401

Affected Products

LSQUIClitespeedtech
On-prem
Networking Infrastructure / load-balancer-proxy
litespeed web adclitespeedtech
On-prem
Networking Infrastructure / load-balancer-proxy
litespeed web serverlitespeedtech
On-prem
Networking Infrastructure / load-balancer-proxy
lsquiclitespeedtech
On-prem
Networking Infrastructure / load-balancer-proxy
openlitespeedlitespeedtech
On-prem
Networking Infrastructure / load-balancer-proxy
litespeedtechcommercialNetworking Infrastructureaka openlitespeed, litespeed web server, litespeed cache

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/litespeedtech/lsquic/blob/70486141724f85e97b08f510673e29f399bbae8f/CHANGELOG#L1-L3
github.com
https://github.com/litespeedtech/lsquic/commit/4cd9252e77fb4a36b572e2167a84067d603d3b23
github.com
https://www.imperva.com/blog/quic-leak-cve-2025-54939-new-high-risk-pre-handshake-remote-denial-of-service-in-lsquic-quic-implementation/
imperva.com
and 1 more references View all →

Timeline

Published
Aug 1, 2025
Last Updated
Aug 27, 2025

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