LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.
Priority LOW 34CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-770.
Summary
LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00837 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed LSQUIC (litespeedtech): 4.3.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| litespeedtech | LSQUIC | before 4.3.1 | 4.3.1 | Patch available | CNA |
- LSQUIC Vendorlitespeedtech Affected before 4.3.1 Fixed in 4.3.1 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:litespeedtech:litespeed_web_adc:*:*:*:*:*:*:*:* | before 3.3.1 | Vulnerable | litespeedtech |
| cpe:2.3:a:litespeedtech:litespeed_web_server:*:*:*:*:*:*:*:* | before 6.3.4 | Vulnerable | litespeedtech |
| cpe:2.3:a:litespeedtech:lsquic:*:*:*:*:*:*:*:* | before 4.3.1 | Vulnerable | litespeedtech |
| cpe:2.3:a:litespeedtech:openlitespeed:*:*:*:*:*:*:*:* | before 1.8.4 | Vulnerable | litespeedtech |
- cpe:2.3:a:litespeedtech:litespeed_web_adc:*:*:*:*:*:*:*:* Versions before 3.3.1 Vulnerable ·litespeedtech
- cpe:2.3:a:litespeedtech:litespeed_web_server:*:*:*:*:*:*:*:* Versions before 6.3.4 Vulnerable ·litespeedtech
- cpe:2.3:a:litespeedtech:lsquic:*:*:*:*:*:*:*:* Versions before 4.3.1 Vulnerable ·litespeedtech
- cpe:2.3:a:litespeedtech:openlitespeed:*:*:*:*:*:*:*:* Versions before 1.8.4 Vulnerable ·litespeedtech
Remediation
- Fix · CNA LSQUIC (litespeedtech) Fixed in 4.3.1
Timeline
- 2026-10-02 Threatist record created from CVE-2025-54939
- 2026-10-03 Alias added: GHSA-839r-7hhg-xhqr
References
Sources
- CVE-2025-54939 · CVE Program
- CVE-2025-54939 · NVD
- FIRST EPSS
- GHSA-839r-7hhg-xhqr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences