# CVE-2025-1948: jetty12: In Eclipse Jetty versions 12.0.0 to 12.0.16 included, an HTTP/2 client can specify a very large value for the HTTP/2...

CVE-2025-1948 is fixed in jetty12 on 1 platform, first by DEBIAN-CVE-2025-1948, released May 8, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-1948
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0078
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 8, 2025

## Description

In Eclipse Jetty versions 12.0.0 to 12.0.16 included, an HTTP/2 client can specify a very large value for the HTTP/2 settings parameter SETTINGS_MAX_HEADER_LIST_SIZE. The Jetty HTTP/2 server does not perform validation on this setting, and tries to allocate a ByteBuffer of the specified capacity to encode HTTP responses, likely resulting in OutOfMemoryError being thrown, or even the JVM process exiting.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | jetty12 Debian 13.5 (trixie) | 12.0.17-1 | [DEBIAN-CVE-2025-1948](https://patchblox.com/security/data/fix/linux/debian-cve-2025-1948.md) | May 8, 2025 |
| Linux | jetty12 Debian 14 | 12.0.17-1 | [DEBIAN-CVE-2025-1948](https://patchblox.com/security/data/fix/linux/debian-cve-2025-1948.md) | May 8, 2025 |

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