CVE-2025-31650: Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame

Published Apr 28, 2025
·
Updated

Improper Input Validation vulnerability in Apache Tomcat. Incorrect error handling for some invalid HTTP priority headers resulted in incomplete clean-up of the failed request which created a memory leak. A large number of such requests could trigger an OutOfMemoryException resulting in a denial of service.

This issue affects Apache Tomcat: from 9.0.76 through 9.0.102, from 10.1.10 through 10.1.39, from 11.0.0-M2 through 11.0.5.

Users are recommended to upgrade to version 9.0.104, 10.1.40 or 11.0.6 which fix the issue.

Other sources

Improper Input Validation vulnerability in Apache Tomcat. Incorrect error handling for some invalid HTTP priority headers resulted in incomplete clean-up of the failed request which created a memory leak. A large number of such requests could trigger an OutOfMemoryException resulting in a denial of service.

This issue affects Apache Tomcat: from 9.0.76 through 9.0.102, from 10.1.10 through 10.1.39, from 11.0.0-M2 through 11.0.5. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.90 though 8.5.100.

Users are recommended to upgrade to version 9.0.104, 10.1.40 or 11.0.6 which fix the issue.

— NVD

Affected Software

36 affected componentsFixes available
Apache Tomcat>=9.0.76<=9.0.102, >=10.1.10<=10.1.39, >=11.0.0-M2<=11.0.5
Apache Tomcat>=9.0.76<9.0.104
Apache Tomcat>=10.1.10<10.1.40
Apache Tomcat>=11.0.1<11.0.6
Apache Tomcat=11.0.0-milestone10
Apache Tomcat=11.0.0-milestone11
Apache Tomcat=11.0.0-milestone12
Apache Tomcat=11.0.0-milestone13
Apache Tomcat=11.0.0-milestone14
Apache Tomcat=11.0.0-milestone15
Apache Tomcat=11.0.0-milestone16
Apache Tomcat=11.0.0-milestone17
Apache Tomcat=11.0.0-milestone18
Apache Tomcat=11.0.0-milestone19
Apache Tomcat=11.0.0-milestone2
Apache Tomcat=11.0.0-milestone20
Apache Tomcat=11.0.0-milestone21
Apache Tomcat=11.0.0-milestone22
Apache Tomcat=11.0.0-milestone23
Apache Tomcat=11.0.0-milestone24
Apache Tomcat=11.0.0-milestone25
Apache Tomcat=11.0.0-milestone3
Apache Tomcat=11.0.0-milestone4
Apache Tomcat=11.0.0-milestone5
Apache Tomcat=11.0.0-milestone6
Apache Tomcat=11.0.0-milestone7
Apache Tomcat=11.0.0-milestone8
Apache Tomcat=11.0.0-milestone9
maven/org.apache.tomcat.embed:tomcat-embed-core>=11.0.0-M2<11.0.6
11.0.6
maven/org.apache.tomcat.embed:tomcat-embed-core>=10.1.10<10.1.40
10.1.40
maven/org.apache.tomcat.embed:tomcat-embed-core>=9.0.76<=9.0.102
9.0.104
maven/org.apache.tomcat:tomcat-coyote>=11.0.0-M2<11.0.6
11.0.6
maven/org.apache.tomcat:tomcat-coyote>=10.1.10<10.1.40
10.1.40
maven/org.apache.tomcat:tomcat-coyote>=9.0.76<=9.0.102
9.0.104
IBM Engineering Requirements Management DOORS and DOORS Web Access<=9.7.2.1 - 9.7.2.11
IBM Engineering Requirements Management DOORS and DOORS Web Access<=9.6.1.1 - 9.6.1.13

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade maven/org.apache.tomcat.embed:tomcat-embed-core to a version that resolves this vulnerability.

    Fixed in 11.0.6
  2. Upgrade

    Upgrade maven/org.apache.tomcat.embed:tomcat-embed-core to a version that resolves this vulnerability.

    Fixed in 10.1.40
  3. Upgrade

    Upgrade maven/org.apache.tomcat.embed:tomcat-embed-core to a version that resolves this vulnerability.

    Fixed in 9.0.104
  4. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat-coyote to a version that resolves this vulnerability.

    Fixed in 11.0.6
  5. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat-coyote to a version that resolves this vulnerability.

    Fixed in 10.1.40
  6. Upgrade

    Upgrade maven/org.apache.tomcat:tomcat-coyote to a version that resolves this vulnerability.

    Fixed in 9.0.104
  7. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 9.0.104
  8. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 10.1.40
  9. Upgrade

    Upgrade Apache Tomcat to a version that resolves this vulnerability.

    Fixed in 11.0.6

Event History

Apr 28, 2025
CVE Published
via MITRE·07:14 PM
Data Sourced
via MITRE·07:14 PM
DescriptionWeakness
Data Sourced
via Red Hat·08:01 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·08:15 PM
DescriptionSeverityWeaknessAffected Software
Advisory Published
via GitHub·09:30 PM
Jun 5, 2025
Exploit Published
12:00 AM
Known Exploited
06:22 PM
Jul 6, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2025-31650?

CVE-2025-31650 has a moderate severity level due to the potential for memory leaks leading to OutOfMemoryExceptions.

2

How do I fix CVE-2025-31650?

To fix CVE-2025-31650, upgrade to Apache Tomcat versions 9.0.102 or later, 10.1.39 or later, or 11.0.5 or later.

3

What systems are affected by CVE-2025-31650?

CVE-2025-31650 affects Apache Tomcat versions between 9.0.76 and 9.0.102, 10.1.10 and 10.1.39, and 11.0.0-M2 to 11.0.5.

4

What causes the vulnerability in CVE-2025-31650?

CVE-2025-31650 is caused by improper input validation leading to incorrect error handling for invalid HTTP priority headers.

5

What risks does CVE-2025-31650 pose to my applications?

CVE-2025-31650 can result in high memory usage and application crashes due to frequent OutOfMemoryExceptions from invalid HTTP requests.

Company

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Contact

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