Resource Exhaustion Affecting pcs package, versions <0:0.10.18-2.el8_10.7.alma.1


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.52% (42nd percentile)

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  • Snyk IDSNYK-ALMALINUX8-PCS-14089293
  • published21 Nov 2025
  • disclosed11 Nov 2025

Introduced: 11 Nov 2025

CVE-2025-61771  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 pcs to version 0:0.10.18-2.el8_10.7.alma.1 or higher.
This issue was patched in ALSA-2025:19719.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pcs package and not the pcs package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

Rack is a modular Ruby web server interface. In versions prior to 2.2.19, 3.1.17, and 3.2.2, ``Rack::Multipart::Parserstores non-file form fields (parts without afilename) entirely in memory as Ruby Stringobjects. A single large text field in a multipart/form-data request (hundreds of megabytes or more) can consume equivalent process memory, potentially leading to out-of-memory (OOM) conditions and denial of service (DoS). Attackers can send large non-file fields to trigger excessive memory usage. Impact scales with request size and concurrency, potentially leading to worker crashes or severe garbage-collection overhead. All Rack applications processing multipart form submissions are affected. Versions 2.2.19, 3.1.17, and 3.2.2 enforce a reasonable size cap for non-file fields (e.g., 2 MiB). Workarounds include restricting maximum request body size at the web-server or proxy layer (e.g., Nginxclient_max_body_size`) and validating and rejecting unusually large form fields at the application level.

CVSS Base Scores

version 3.1