Red Hat RRDtool Updates Fix RHEL 9 Memory-Safety Flaw
Tech GuruQuick Answer
The authority published RHSA-2026:72277 for RHEL 9.2 and 9.4 E4S rrdtool packages before the branch-specific fixed builds. Red Hat published Moderate-severity RRDtool updates for RHEL 9.2 and 9.4 E4S to correct CVE-2026-43958, an official 7.8 High memory-safety flaw. Affected deployments should be matched to the authority's exact scope and moved to the supported fixed release.
Confirm Scope And Apply The Supported Fix
What to do now: Inventory RHEL 9.2 and 9.4 E4S rrdtool packages before the branch-specific fixed builds, match the exact affected release or feature, apply the authority-supported fixed build or service remediation, validate the dependent workflow, and preserve evidence.
Last verified: 2026-09-28 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | RHEL 9.2 and 9.4 E4S rrdtool packages before the branch-specific fixed builds |
|---|---|
| Advisory | RHSA-2026:72277 / RHSA-2026:72278 |
| CVE | CVE-2026-43958 |
| Authoritative release date | RHSA-2026:72277: 2026-09-28 03:08:13 UTC; RHSA-2026:72278: 2026-09-28 03:08:33 UTC |
| Authority revision date | RHSA-2026:72277: 2026-09-28 03:30:36 UTC; RHSA-2026:72278: 2026-09-28 03:30:15 UTC |
| Affected versions | Entitled RHEL 9.2 and RHEL 9.4 Extended Update Support systems with advisory-listed rrdtool packages before the fixed branch build. |
| Fixed version | rrdtool 1.7.2-21.el9_2.1 / 1.7.2-21.el9_4.1 |
| CVSS base score | 7.8 (CVSS v3.1) |
| CVSS severity | High |
| Exploitation status | Not stated by the authority; no exploitation claim is inferred. |
What Changed
Red Hat published Moderate-severity RRDtool updates for RHEL 9.2 and 9.4 E4S to correct CVE-2026-43958, an official 7.8 High memory-safety flaw.
What To Validate Now
- Inventory. Locate RHEL 9.2 and 9.4 E4S rrdtool packages before the branch-specific fixed builds deployments, versions, enabled features, exposure paths, owners, and dependent services.
- Establish applicability. Compare each deployment with the authority's affected-version statement: Entitled RHEL 9.2 and RHEL 9.4 Extended Update Support systems with advisory-listed rrdtool packages before the fixed branch build. Do not infer applicability from product family or severity alone.
- Remediate. Apply rrdtool 1.7.2-21.el9_2.1 / 1.7.2-21.el9_4.1 through the supported vendor or project channel, following the current advisory and change-control requirements.
- Validate. Confirm the resulting version or managed-service state, exercise representative functionality and recovery paths, monitor for regressions, and document exceptions.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
Use the exact supported release stream and repository. Test dependencies, clusters, integrations, and rollback before broad deployment; a CVSS rating or reachable feature is not evidence of exploitation.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
