litespeedtech LiteSpeed QUIC up to 4.3.0 lsquic_engine_packet_in allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in litespeedtech LiteSpeed QUIC up to 4.3.0 and classified as problematic. The impacted element is the function lsquic_engine_packet_in. Executing a manipulation can lead to allocation of resources. This vulnerability is registered as CVE-2025-54939. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in litespeedtech LiteSpeed QUIC up to 4.3.0. It has been declared as problematic. This vulnerability affects the function lsquic_engine_packet_in. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect availability. CVE summarizes:

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

The advisory is available at github.com. This vulnerability was named CVE-2025-54939 since 08/01/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 4.3.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 4cd9252e77fb4a36b572e2167a84067d603d3b23 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-23337). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 5.3
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: LiteSpeed QUIC 4.3.1
Patch: 4cd9252e77fb4a36b572e2167a84067d603d3b23

Timelineinfo

08/01/2025 Advisory disclosed
08/01/2025 +0 days CVE reserved
08/01/2025 +0 days VulDB entry created
08/27/2025 +26 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2025-54939 (🔒)
GCVE (CVE): GCVE-0-2025-54939
GCVE (VulDB): GCVE-100-318490
EUVD: 🔒

Entryinfo

Created: 08/01/2025 08:52
Updated: 08/27/2025 17:45
Changes: 08/01/2025 08:52 (66), 08/01/2025 13:32 (1), 08/19/2025 14:19 (1), 08/27/2025 17:45 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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