Resource Exhaustion Affecting pcs package, versions <0:0.10.18-2.el8_10.8.alma.1


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.54% (43rd percentile)

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  • Snyk IDSNYK-ALMALINUX8-PCS-15074799
  • published24 Jan 2026
  • disclosed21 Jan 2026

Introduced: 21 Jan 2026

CVE-2025-67726  (opens in a new tab)
CWE-400  (opens in a new tab)
CWE-834  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 pcs to version 0:0.10.18-2.el8_10.8.alma.1 or higher.
This issue was patched in ALSA-2026:0930.

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.

Tornado is a Python web framework and asynchronous networking library. Versions 6.5.2 and below use an inefficient algorithm when parsing parameters for HTTP header values, potentially causing a DoS. The _parseparam function in httputil.py is used to parse specific HTTP header values, such as those in multipart/form-data and repeatedly calls string.count() within a nested loop while processing quoted semicolons. If an attacker sends a request with a large number of maliciously crafted parameters in a Content-Disposition header, the server's CPU usage increases quadratically (O(n²)) during parsing. Due to Tornado's single event loop architecture, a single malicious request can cause the entire server to become unresponsive for an extended period. This issue is fixed in version 6.5.3.

CVSS Base Scores

version 3.1