Upstream information
Description
Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, when PROXY protocol v1 support is enabled, Puma reads incoming bytes into an internal buffer while waiting for CRLF to determine whether a PROXY v1 line is present, allowing an attacker that continuously sends bytes without CRLF to cause unbounded in-process memory growth and additional CPU cost from repeatedly scanning the growing buffer. This issue is fixed in versions 7.2.1 and 8.0.2.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having important severity.
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 7.5 | 7.5 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | None | None |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise High Availability Extension 15 SP7 | rubygem-puma | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Availability Extension 15 SP4 | rubygem-puma | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP5 | rubygem-puma | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise High Availability Extension 15 | rubygem-puma | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP1 | rubygem-puma | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP2 | rubygem-puma | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP3 | rubygem-puma | Affected |
| SUSE Linux Enterprise High Availability Extension 15 SP6 | rubygem-puma | Affected |
| openSUSE Leap 15.3 | rubygem-puma | Affected |
| openSUSE Leap 15.4 | rubygem-puma | Affected |
| openSUSE Leap 15.5 | rubygem-puma | Affected |
| openSUSE Leap 15.6 | rubygem-puma | Affected |
SUSE Timeline for this CVE
CVE page created: Thu Jul 16 11:31:09 2026CVE page last modified: Thu Jul 16 11:31:09 2026