Resource Exhaustion Affecting pcs package, versions <0:0.11.10-1.el9_7.1


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.16% (38th percentile)

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  • Snyk IDSNYK-ALMALINUX9-PCS-14152217
  • published1 Dec 2025
  • disclosed4 Nov 2025

Introduced: 4 Nov 2025

NewCVE-2025-61772  (opens in a new tab)
CWE-400  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 pcs to version 0:0.11.10-1.el9_7.1 or higher.
This issue was patched in ALSA-2025:20962.

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:9 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::Parser can accumulate unbounded data when a multipart part’s header block never terminates with the required blank line (CRLFCRLF). The parser keeps appending incoming bytes to memory without a size cap, allowing a remote attacker to exhaust memory and cause a denial of service (DoS). Attackers can send incomplete multipart headers to trigger high memory use, leading to process termination (OOM) or severe slowdown. The effect scales with request size limits and concurrency. All applications handling multipart uploads may be affected. Versions 2.2.19, 3.1.17, and 3.2.2 cap per-part header size (e.g., 64 KiB). As a workaround, restrict maximum request sizes at the proxy or web server layer (e.g., Nginx client_max_body_size).

CVSS Base Scores

version 3.1