Red Hat Security Advisory: pcs security update
The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities. Security Fix(es): * rubygem-rack: Unbounded-Parameter DoS in Rack::QueryParser (CVE-2025-46727) * tornado: Tornado Multipart Form-Data Denial of Service (CVE-2025-47287) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
The pcs packages, which provide command-line configuration for Pacemaker and Corosync, are affected by two denial-of-service vulnerabilities. CVE-2025-46727 involves an unbounded-parameter denial of service in the Rack::QueryParser component of rubygem-rack. CVE-2025-47287 involves a denial of service via multipart form-data handling in tornado. Red Hat has released an update for Red Hat Enterprise Linux 8.8 Extended Update Support and related variants to address these issues. The advisory is classified as Important by Red Hat Product Security. No CVSS base score is provided in the advisory, but the severity is assessed as high in the source data.
Potential Impact
Successful exploitation of these vulnerabilities could result in denial of service conditions affecting systems running the affected pcs packages. This could disrupt the configuration and management of cluster resources managed by Pacemaker and Corosync. There are no known exploits in the wild at the time of the advisory. The impact is limited to denial of service rather than code execution or data compromise.
Mitigation Recommendations
Red Hat has released updated pcs packages that fix these vulnerabilities. Users of Red Hat Enterprise Linux 8.8 Extended Update Support and related variants should apply the provided security update (pcs-0.10.15-4.el8_8.6) as detailed in the Red Hat advisory RHSA-2025:8279. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: pcs security update
Description
The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities. Security Fix(es): * rubygem-rack: Unbounded-Parameter DoS in Rack::QueryParser (CVE-2025-46727) * tornado: Tornado Multipart Form-Data Denial of Service (CVE-2025-47287) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The pcs packages, which provide command-line configuration for Pacemaker and Corosync, are affected by two denial-of-service vulnerabilities. CVE-2025-46727 involves an unbounded-parameter denial of service in the Rack::QueryParser component of rubygem-rack. CVE-2025-47287 involves a denial of service via multipart form-data handling in tornado. Red Hat has released an update for Red Hat Enterprise Linux 8.8 Extended Update Support and related variants to address these issues. The advisory is classified as Important by Red Hat Product Security. No CVSS base score is provided in the advisory, but the severity is assessed as high in the source data.
Potential Impact
Successful exploitation of these vulnerabilities could result in denial of service conditions affecting systems running the affected pcs packages. This could disrupt the configuration and management of cluster resources managed by Pacemaker and Corosync. There are no known exploits in the wild at the time of the advisory. The impact is limited to denial of service rather than code execution or data compromise.
Mitigation Recommendations
Red Hat has released updated pcs packages that fix these vulnerabilities. Users of Red Hat Enterprise Linux 8.8 Extended Update Support and related variants should apply the provided security update (pcs-0.10.15-4.el8_8.6) as detailed in the Red Hat advisory RHSA-2025:8279. Refer to https://access.redhat.com/articles/11258 for update instructions. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:8279
- Cve Count
- 2
- Additional Cves
- ["CVE-2025-47287"]
Threat ID: 6a3da1d04853345fc1824be7
Added to database: 06/25/2026, 21:46:56 UTC
Last enriched: 07/12/2026, 11:19:31 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 34
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.