CVE-2025-54939

HIGH EPSS 51.0%
Published Aug 1, 202511mo ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published Aug 1, 2025 11mo ago
Last Modified Jun 17, 2026 1w ago

Description

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

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
51.0% percentile
Exploit & Patch Status
Public Exploit Known
No Patch Available

Weaknesses 2

CWE-401
CWE-770

Affected Products 4

VendorProductVersionRange
litespeedtechlitespeed_web_adc* <3.3.1
litespeedtechlitespeed_web_server* <6.3.4
litespeedtechlsquic* <4.3.1
litespeedtechopenlitespeed* <1.8.4

References 4

  • blog.litespeedtech.com https://blog.litespeedtech.com/2025/08/18/litespeed-security-update/
    Vendor Advisory
  • github.com https://github.com/litespeedtech/lsquic/blob/70486141724f85e97b08f510673e29f399bbae8f/CHANGELOG#L1-L3
    Release Notes
  • github.com https://github.com/litespeedtech/lsquic/commit/4cd9252e77fb4a36b572e2167a84067d603d3b23
    Release Notes
  • imperva.com https://www.imperva.com/blog/quic-leak-cve-2025-54939-new-high-risk-pre-handshake-remote-denial-of-service-in-lsquic-quic-implementation/
    ExploitThird Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.