Vulnerability-Lookup

CVE-2025-52434 (GCVE-0-2025-52434)

Vulnerability from cvelistv5 – Published: 2025-07-10 19:03 – Updated: 2025-11-04 21:11

Title

Apache Tomcat: APR/Native Connector crash leading to DoS

Summary

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections. This issue affects Apache Tomcat: from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 9.0.107, which fixes the issue.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-07-11 14:02 UTC

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

apache CNA under the mitre root

CNA scorecard B 76/100 over 1176 records in the last 180 days details

References

3 references

URL	Tags
https://lists.apache.org/thread/gxgh65004f25y8519…	vendor-advisory
https://lists.debian.org/debian-lts-announce/2025…
http://www.openwall.com/lists/oss-security/2025/0…

Impacted products

1 product

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache Tomcat	Affected: 9.0.0.M1 , ≤ 9.0.106 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Unknown: 5 , < 8.5.0 (semver) Unknown: 10.0.0-M1 , ≤ 10.0.27 (semver)	guessed

Credits

Nacl 12SqweR WHOAMI yyzmoon

Show details on NVD website

JSON

To clipboard

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RHSA-2025:14181

Vulnerability from csaf_redhat - Published: 2025-08-20 15:41 - Updated: 2026-11-05 15:41

Summary

Red Hat Security Advisory: tomcat security update

Severity

Important

Scope

7 vulnerabilities in this advisory, including CVE-2025-52434.

CVE-2025-52434

A denial of service flaw was found in Apache Tomcat. A race condition during connection closure could trigger a JVM crash when using the APR/Native connector, leading to a denial of service. This issue was particularly noticeable with client-initiated closures of HTTP/2 connections.

5.3 (Medium)


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

Fixed: 9 products

https://access.redhat.com/errata/RHSA-2025:14181

Open the full advisory

RHSA-2025:14182

Vulnerability from csaf_redhat - Published: 2025-08-20 15:36 - Updated: 2026-11-05 15:41

Summary

Red Hat Security Advisory: tomcat security update

Severity

Important

Scope

7 vulnerabilities in this advisory, including CVE-2025-52434.

CVE-2025-52434

5.3 (Medium)


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

Fixed: 18 products

https://access.redhat.com/errata/RHSA-2025:14182

Open the full advisory

RHSA-2025:14183

Vulnerability from csaf_redhat - Published: 2025-08-20 15:40 - Updated: 2026-11-05 15:41

Summary

Red Hat Security Advisory: tomcat security update

Severity

Important

Scope

7 vulnerabilities in this advisory, including CVE-2025-52434.

CVE-2025-52434

5.3 (Medium)


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

Fixed: 9 products

https://access.redhat.com/errata/RHSA-2025:14183

Open the full advisory

SUSE-SU-2025:03024-1

Vulnerability from csaf_suse - Published: 2025-08-29 12:40 - Updated: 2025-08-29 12:40

Summary

Security update for tomcat

Severity

Important

Scope

5 vulnerabilities in this advisory, including CVE-2025-52434.

CVE-2025-52434

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 116 products

Open the full advisory

SUSE-SU-2026:1058-1

Vulnerability from csaf_suse - Published: 2026-03-26 09:46 - Updated: 2026-09-23 08:30

Summary

Security update for tomcat

Severity

Important

Scope

43 vulnerabilities in this advisory, including CVE-2025-52434.

CVE-2025-52434

5.9 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 45 products

Open the full advisory

UBUNTU-CVE-2025-52434 (CVE-2025-52434)

Vulnerability from osv_ubuntu – Published: 2025-07-10 19:15 – Updated: 2026-07-15 17:47 – Source website

Details

Severity

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2025-52434	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-52434	REPORT
	https://lists.apache.org/thread/gxgh65004f25y8519…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libservlet3.1-java",
            "binary_version": "8.0.32-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "libtomcat8-java",
            "binary_version": "8.0.32-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "tomcat8",
            "binary_version": "8.0.32-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "tomcat8-admin",
            "binary_version": "8.0.32-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "tomcat8-common",
            "binary_version": "8.0.32-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "tomcat8-docs",
            "binary_version": "8.0.32-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "tomcat8-examples",
            "binary_version": "8.0.32-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "tomcat8-user",
            "binary_version": "8.0.32-1ubuntu1.13+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "tomcat8",
        "purl": "pkg:deb/ubuntu/tomcat8@8.0.32-1ubuntu1.13+esm2?arch=source\u0026distro=esm-infra-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.0.26-1",
        "8.0.28-1",
        "8.0.30-1",
        "8.0.32-1",
        "8.0.32-1ubuntu1",
        "8.0.32-1ubuntu1.1",
        "8.0.32-1ubuntu1.2",
        "8.0.32-1ubuntu1.3",
        "8.0.32-1ubuntu1.4",
        "8.0.32-1ubuntu1.5",
        "8.0.32-1ubuntu1.6",
        "8.0.32-1ubuntu1.7",
        "8.0.32-1ubuntu1.8",
        "8.0.32-1ubuntu1.9",
        "8.0.32-1ubuntu1.10",
        "8.0.32-1ubuntu1.11",
        "8.0.32-1ubuntu1.13",
        "8.0.32-1ubuntu1.13+esm1",
        "8.0.32-1ubuntu1.13+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtomcat8-embed-java",
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm6"
          },
          {
            "binary_name": "libtomcat8-java",
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm6"
          },
          {
            "binary_name": "tomcat8",
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm6"
          },
          {
            "binary_name": "tomcat8-admin",
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm6"
          },
          {
            "binary_name": "tomcat8-common",
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm6"
          },
          {
            "binary_name": "tomcat8-docs",
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm6"
          },
          {
            "binary_name": "tomcat8-examples",
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm6"
          },
          {
            "binary_name": "tomcat8-user",
            "binary_version": "8.5.39-1ubuntu1~18.04.3+esm6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "tomcat8",
        "purl": "pkg:deb/ubuntu/tomcat8@8.5.39-1ubuntu1~18.04.3+esm6?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.5.21-1ubuntu1",
        "8.5.29-1",
        "8.5.30-1",
        "8.5.30-1ubuntu1",
        "8.5.30-1ubuntu1.2",
        "8.5.30-1ubuntu1.3",
        "8.5.30-1ubuntu1.4",
        "8.5.39-1ubuntu1~18.04.1",
        "8.5.39-1ubuntu1~18.04.2",
        "8.5.39-1ubuntu1~18.04.3",
        "8.5.39-1ubuntu1~18.04.3+esm1",
        "8.5.39-1ubuntu1~18.04.3+esm2",
        "8.5.39-1ubuntu1~18.04.3+esm3",
        "8.5.39-1ubuntu1~18.04.3+esm4",
        "8.5.39-1ubuntu1~18.04.3+esm5",
        "8.5.39-1ubuntu1~18.04.3+esm6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtomcat9-embed-java",
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
          },
          {
            "binary_name": "libtomcat9-java",
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
          },
          {
            "binary_name": "tomcat9",
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
          },
          {
            "binary_name": "tomcat9-admin",
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
          },
          {
            "binary_name": "tomcat9-common",
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
          },
          {
            "binary_name": "tomcat9-docs",
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
          },
          {
            "binary_name": "tomcat9-examples",
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
          },
          {
            "binary_name": "tomcat9-user",
            "binary_version": "9.0.16-3ubuntu0.18.04.2+esm8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.16-3ubuntu0.18.04.2+esm8?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.0.16-3~18.04.1",
        "9.0.16-3ubuntu0.18.04.1",
        "9.0.16-3ubuntu0.18.04.2",
        "9.0.16-3ubuntu0.18.04.2+esm1",
        "9.0.16-3ubuntu0.18.04.2+esm2",
        "9.0.16-3ubuntu0.18.04.2+esm3",
        "9.0.16-3ubuntu0.18.04.2+esm4",
        "9.0.16-3ubuntu0.18.04.2+esm5",
        "9.0.16-3ubuntu0.18.04.2+esm6",
        "9.0.16-3ubuntu0.18.04.2+esm7",
        "9.0.16-3ubuntu0.18.04.2+esm8"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtomcat9-embed-java",
            "binary_version": "9.0.31-1ubuntu0.9+esm3"
          },
          {
            "binary_name": "libtomcat9-java",
            "binary_version": "9.0.31-1ubuntu0.9+esm3"
          },
          {
            "binary_name": "tomcat9",
            "binary_version": "9.0.31-1ubuntu0.9+esm3"
          },
          {
            "binary_name": "tomcat9-admin",
            "binary_version": "9.0.31-1ubuntu0.9+esm3"
          },
          {
            "binary_name": "tomcat9-common",
            "binary_version": "9.0.31-1ubuntu0.9+esm3"
          },
          {
            "binary_name": "tomcat9-docs",
            "binary_version": "9.0.31-1ubuntu0.9+esm3"
          },
          {
            "binary_name": "tomcat9-examples",
            "binary_version": "9.0.31-1ubuntu0.9+esm3"
          },
          {
            "binary_name": "tomcat9-user",
            "binary_version": "9.0.31-1ubuntu0.9+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.31-1ubuntu0.9+esm3?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
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        "9.0.27-1",
        "9.0.31-1",
        "9.0.31-1ubuntu0.1",
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        "9.0.31-1ubuntu0.3",
        "9.0.31-1ubuntu0.4",
        "9.0.31-1ubuntu0.5",
        "9.0.31-1ubuntu0.6",
        "9.0.31-1ubuntu0.7",
        "9.0.31-1ubuntu0.8",
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        "9.0.31-1ubuntu0.9+esm1",
        "9.0.31-1ubuntu0.9+esm2",
        "9.0.31-1ubuntu0.9+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtomcat9-embed-java",
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            "binary_name": "libtomcat9-java",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
          },
          {
            "binary_name": "tomcat9",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
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          {
            "binary_name": "tomcat9-admin",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
          },
          {
            "binary_name": "tomcat9-common",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
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          {
            "binary_name": "tomcat9-docs",
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          {
            "binary_name": "tomcat9-examples",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
          },
          {
            "binary_name": "tomcat9-user",
            "binary_version": "9.0.58-1ubuntu0.2+esm4"
          }
        ]
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      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "tomcat9",
        "purl": "pkg:deb/ubuntu/tomcat9@9.0.58-1ubuntu0.2+esm4?arch=source\u0026distro=esm-apps/jammy"
      },
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        "9.0.54-1",
        "9.0.55-1",
        "9.0.58-1",
        "9.0.58-1ubuntu0.1",
        "9.0.58-1ubuntu0.1+esm1",
        "9.0.58-1ubuntu0.1+esm2",
        "9.0.58-1ubuntu0.1+esm3",
        "9.0.58-1ubuntu0.1+esm4",
        "9.0.58-1ubuntu0.2",
        "9.0.58-1ubuntu0.2+esm1",
        "9.0.58-1ubuntu0.2+esm2",
        "9.0.58-1ubuntu0.2+esm3",
        "9.0.58-1ubuntu0.2+esm4"
      ]
    }
  ],
  "aliases": [],
  "details": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027) vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections. This issue affects Apache Tomcat: from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 9.0.107, which fixes the issue.",
  "id": "UBUNTU-CVE-2025-52434",
  "modified": "2026-07-15T17:47:02Z",
  "published": "2025-07-10T19:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-52434"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-52434"
    },
    {
      "type": "REPORT",
      "url": "https://lists.apache.org/thread/gxgh65004f25y8519coth6w7vchww030"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-52434"
  ]
}

WID-SEC-W-2025-1468

Vulnerability from csaf_certbund - Published: 2025-07-07 22:00 - Updated: 2026-03-26 23:00

Summary

Apache Tomcat: Mehrere Schwachstellen ermöglichen Denial of Service

Severity

Mittel

Scope

3 vulnerabilities in this advisory, including CVE-2025-52434.

CVE-2025-52434

Known affected: 36 products

Open the full advisory

WID-SEC-W-2025-1905

Vulnerability from csaf_certbund - Published: 2025-08-25 22:00 - Updated: 2026-03-04 23:00

Summary

IBM QRadar SIEM Komponente: Mehrere Schwachstellen

Severity

Hoch

Scope

57 vulnerabilities in this advisory, including CVE-2025-52434.

CVE-2025-52434

Known affected: 3 products

Open the full advisory

WID-SEC-W-2026-0177

Vulnerability from csaf_certbund - Published: 2026-01-20 23:00 - Updated: 2026-03-18 23:00

Summary

Atlassian Bamboo, Bitbucket, Confluence und Jira: Mehrere Schwachstellen

Severity

Hoch

Scope

25 vulnerabilities in this advisory, including CVE-2025-52434.

CVE-2025-52434

Known affected: 19 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2025-52434 (GCVE-0-2025-52434)

UBUNTU-CVE-2025-52434 (CVE-2025-52434)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour