CVE-2025-54939

MEDIUM
Published Aug 1, 2025 Modified Aug 27, 2025 CWE-770 CWE-401

Description

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

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CVSS v3.1 Score

5.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-770 CWE-770
CWE-401 CWE-401

Affected Products

Vendor Product
litespeedtech litespeed_web_adc
litespeedtech litespeed_web_server
litespeedtech lsquic
litespeedtech openlitespeed

References

Frequently Asked Questions

What is CVE-2025-54939? +
LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak. It has a CVSS v3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2025-54939? +
CVE-2025-54939 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2025-54939? +
CVE-2025-54939 affects products from litespeedtech, specifically: litespeed_web_adc, litespeed_web_server, lsquic, openlitespeed. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-54939? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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