Apache Tomcat: h2 DoS - Made You Reset (CVE-2025-48989)
Apache Tomcat versions 9.0.0 through 9.0.107, 10.1.0 through 10.1.43, and 11.0.0 through 11.0.9 are affected by a vulnerability known as the 'made you reset' attack, which involves improper resource shutdown or release. This vulnerability can lead to a denial of service (DoS) condition. Users are advised to upgrade to fixed versions 9.0.108, 10.1.44, or 11.0.10 to remediate the issue.
AI Analysis
Technical Summary
CVE-2025-48989 is an improper resource shutdown or release vulnerability in Apache Tomcat's HTTP/2 (h2) implementation. This flaw allows an attacker to trigger a denial of service condition by exploiting the way Tomcat handles resource cleanup, causing the server to reset connections improperly. The vulnerability affects Apache Tomcat versions from 9.0.0 through 9.0.107, 10.1.0 through 10.1.43, and 11.0.0 through 11.0.9. Fixed versions have been released as 9.0.108, 10.1.44, and 11.0.10.
Potential Impact
Successful exploitation of this vulnerability can cause denial of service by forcing Apache Tomcat to reset connections improperly, potentially disrupting service availability. There is no indication of remote code execution or data breach from the provided data.
Mitigation Recommendations
A patch is available for this vulnerability. Users should upgrade to Apache Tomcat versions 9.0.108, 10.1.44, or 11.0.10, which contain the official fix. Applying these updates will mitigate the risk of the 'made you reset' denial of service attack.
Apache Tomcat: h2 DoS - Made You Reset (CVE-2025-48989)
Description
Apache Tomcat versions 9.0.0 through 9.0.107, 10.1.0 through 10.1.43, and 11.0.0 through 11.0.9 are affected by a vulnerability known as the 'made you reset' attack, which involves improper resource shutdown or release. This vulnerability can lead to a denial of service (DoS) condition. Users are advised to upgrade to fixed versions 9.0.108, 10.1.44, or 11.0.10 to remediate the issue.
Affected software
pkg:deb/ubuntu/[email protected]+esm3?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/[email protected]~18.04.3+esm6?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/[email protected]+esm8?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/[email protected]+esm3?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/[email protected]+esm4?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/[email protected]~esm4?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/[email protected]?arch=source&distro=questingpkg:deb/ubuntu/[email protected]~26.04.1?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]~26.04.1?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-48989 is an improper resource shutdown or release vulnerability in Apache Tomcat's HTTP/2 (h2) implementation. This flaw allows an attacker to trigger a denial of service condition by exploiting the way Tomcat handles resource cleanup, causing the server to reset connections improperly. The vulnerability affects Apache Tomcat versions from 9.0.0 through 9.0.107, 10.1.0 through 10.1.43, and 11.0.0 through 11.0.9. Fixed versions have been released as 9.0.108, 10.1.44, and 11.0.10.
Potential Impact
Successful exploitation of this vulnerability can cause denial of service by forcing Apache Tomcat to reset connections improperly, potentially disrupting service availability. There is no indication of remote code execution or data breach from the provided data.
Mitigation Recommendations
A patch is available for this vulnerability. Users should upgrade to Apache Tomcat versions 9.0.108, 10.1.44, or 11.0.10, which contain the official fix. Applying these updates will mitigate the risk of the 'made you reset' denial of service attack.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2025-48989
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
Threat ID: 6a58b50768715ace43db2943
Added to database: 07/16/2026, 10:40:07 UTC
Last enriched: 09/08/2026, 15:07:25 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 36
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