FKIE_CVE-2025-54939

Vulnerability from fkie_nvd - Published: 2025-08-01 06:15 - Updated: 2025-08-27 15:52
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.
References
cve@mitre.orghttps://blog.litespeedtech.com/2025/08/18/litespeed-security-update/Vendor Advisory
cve@mitre.orghttps://github.com/litespeedtech/lsquic/blob/70486141724f85e97b08f510673e29f399bbae8f/CHANGELOG#L1-L3Release Notes
cve@mitre.orghttps://github.com/litespeedtech/lsquic/commit/4cd9252e77fb4a36b572e2167a84067d603d3b23Release Notes
cve@mitre.orghttps://www.imperva.com/blog/quic-leak-cve-2025-54939-new-high-risk-pre-handshake-remote-denial-of-service-in-lsquic-quic-implementation/Exploit, Third Party Advisory
Impacted products
Vendor Product Version
litespeedtech litespeed_web_adc *
litespeedtech litespeed_web_server *
litespeedtech lsquic *
litespeedtech openlitespeed *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:litespeedtech:litespeed_web_adc:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "477DB91F-DF76-4029-9FFB-7F886FC47DE3",
              "versionEndExcluding": "3.3.1",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "FAA03044-E04B-4985-B180-86C960778CB8",
              "versionEndExcluding": "6.3.4",
              "vulnerable": true
            },
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              "versionEndExcluding": "1.8.4",
              "vulnerable": true
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak."
    },
    {
      "lang": "es",
      "value": "La librer\u00eda LiteSpeed QUIC (LSQUIC) anterior a 4.3.1 tiene una p\u00e9rdida de memoria lsquic_engine_packet_in."
    }
  ],
  "id": "CVE-2025-54939",
  "lastModified": "2025-08-27T15:52:46.787",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
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        "impactScore": 1.4,
        "source": "cve@mitre.org",
        "type": "Secondary"
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          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
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        "type": "Primary"
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  "published": "2025-08-01T06:15:28.860",
  "references": [
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      "source": "cve@mitre.org",
      "tags": [
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      ],
      "url": "https://blog.litespeedtech.com/2025/08/18/litespeed-security-update/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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    },
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      "source": "cve@mitre.org",
      "tags": [
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      "url": "https://www.imperva.com/blog/quic-leak-cve-2025-54939-new-high-risk-pre-handshake-remote-denial-of-service-in-lsquic-quic-implementation/"
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-770"
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      "source": "nvd@nist.gov",
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    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.