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CVE-2025-54939

Good to know:

Date: July 31, 2025

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

Severity Score

5.3

Related Resources (6)

Url: https://github.com/litespeedtech/lsquic/blob/70486141724f85e97b08f510673e29f399bbae8f/CHANGELOG#L1-L3

Url: https://github.com/litespeedtech/lsquic/commit/4cd9252e77fb4a36b572e2167a84067d603d3b23

Url: https://blog.litespeedtech.com/2025/08/18/litespeed-security-update/

Url: https://nvd.nist.gov/vuln/detail/CVE-2025-54939

Url: https://www.imperva.com/blog/quic-leak-cve-2025-54939-new-high-risk-pre-handshake-remote-denial-of-service-in-lsquic-quic-implementation/

Url: https://www.mend.io/vulnerability-database/CVE-2025-54939

Severity Score

5.3

Weakness Type (CWE)

Missing Release of Memory after Effective Lifetime

CWE-401

Allocation of Resources Without Limits or Throttling

CWE-770

Top Fix

Upgrade Version

Upgrade to version https://github.com/litespeedtech/lsquic.git - 4.3.1

CVSS v3.1

Base Score:	5.3
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	NONE
Integrity (I):	NONE
Availability (A):	LOW

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