CVE-2025-54939
published 2025-08-01CVE-2025-54939: LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.
PriorityP433high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.77%
51.0th percentile
LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| litespeedtech | litespeed_web_adc | < 3.3.1 | 3.3.1 |
| litespeedtech | litespeed_web_server | < 6.3.4 | 6.3.4 |
| litespeedtech | lsquic | < 4.3.1 | 4.3.1 |
| litespeedtech | openlitespeed | < 1.8.4 | 1.8.4 |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://blog.litespeedtech.com/2025/08/18/litespeed-security-update/https://github.com/litespeedtech/lsquic/blob/70486141724f85e97b08f510673e29f399bbae8f/CHANGELOG#L1-L3https://github.com/litespeedtech/lsquic/commit/4cd9252e77fb4a36b572e2167a84067d603d3b23https://www.imperva.com/blog/quic-leak-cve-2025-54939-new-high-risk-pre-handshake-remote-denial-of-service-in-lsquic-quic-implementation/
2025-08-01
Published