Red Hat Updates XML Libraries in RHEL Extended Support Streams
Tech GuruQuick Answer
The errata update XML parsing libraries and the Perl binding; applicable CVEs and fixed packages vary between the RHEL support streams. Match installed packages and support entitlements to the errata, apply the supported fixes, validate service operation, and retain evidence.
Confirm Scope And Apply The Supported Remediation
What to do now: Inventory distribution XML libraries and Perl bindings, dependent parsers, support entitlements and paths accepting untrusted documents. Match product, architecture, package epoch/version/release and support stream to the individual erratum; apply each CVE only where its documented prerequisites hold. Install the corresponding libxml2 and perl-XML-LibXML fixes from each applicable RHSA and restart dependent processes where needed. Verify package and loaded-library builds; test XML parsing, schema handling and business integrations, and retain the assessment and change records.
Last verified: 2026-11-02 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | libxml2 and perl-XML-LibXML in the advisory-listed RHEL 8.4 and 8.8 support streams |
|---|---|
| Advisory | RHSA-2026:93470 / RHSA-2026:93473 / RHSA-2026:93463 |
| CVEs | CVE-2025-6170, CVE-2026-11979, CVE-2026-6653, CVE-2026-74860, CVE-2026-8177, CVE-2026-86138, CVE-2026-86140, CVE-2026-86142, CVE-2026-86143, CVE-2026-86144 |
| Authoritative release date | 2026-11-02T03:36:06Z (latest release in this group; individual release dates below) |
| Authority revision date | 2026-11-02T03:38:05Z (latest authority revision in this group) |
| Affected versions | Advisory-listed packages before the corresponding fixed builds on Red Hat Enterprise Linux AppStream AUS (v.8.4); Red Hat Enterprise Linux AppStream E4S (v.8.8); Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4); Red Hat Enterprise Linux AppStream TUS (v.8.8); Red Hat Enterprise Linux BaseOS AUS (v.8.4); Red Hat Enterprise Linux BaseOS E4S (v.8.8); Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4); Red Hat Enterprise Linux BaseOS TUS (v.8.8). |
| Fixed version | libxml2-0:2.9.7-16.el8_8.24.src; libxml2-0:2.9.7-9.el8_4.20.src; perl-XML-LibXML-1:2.0132-2.el8_4.1.src |
| CVSS base score | 2.5-8.5 (CVSS v3.1; CVE-specific) |
| CVSS severity | Low to High |
| Exploitation status | The cited Red Hat advisories do not state that these issues are being maliciously exploited.; no exploitation claim is inferred. |
Authority-Specific Scope And Version Evidence
| RHSA-2026:93470 | Released 2026-11-02T03:27:11Z; revised 2026-11-02T03:27:42Z. Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4). Fixed source package families: perl-XML-LibXML-1:2.0132-2.el8_4.1.src. CVSS: 7.5 (CVSS v3.1; CVE-specific); High. Vendor rating: Important. |
|---|---|
| RHSA-2026:93473 | Released 2026-11-02T03:27:56Z; revised 2026-11-02T03:38:05Z. Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4). Fixed source package families: libxml2-0:2.9.7-9.el8_4.20.src. CVSS: 2.5-8.5 (CVSS v3.1; CVE-specific); Low to High. Vendor rating: Important. |
| RHSA-2026:93463 | Released 2026-11-02T03:36:06Z; revised 2026-11-02T03:38:05Z. Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8), Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS TUS (v.8.8). Fixed source package families: libxml2-0:2.9.7-16.el8_8.24.src. CVSS: 5.6-8.5 (CVSS v3.1; CVE-specific); Medium to High. Vendor rating: Important. |
What Changed
The errata update XML parsing libraries and the Perl binding; applicable CVEs and fixed packages vary between the RHEL support streams.
What To Validate Now
- Inventory. Inventory distribution XML libraries and Perl bindings, dependent parsers, support entitlements and paths accepting untrusted documents.
- Establish applicability. Match product, architecture, package epoch/version/release and support stream to the individual erratum; apply each CVE only where its documented prerequisites hold.
- Remediate. Install the corresponding libxml2 and perl-XML-LibXML fixes from each applicable RHSA and restart dependent processes where needed.
- Validate. Verify package and loaded-library builds; test XML parsing, schema handling and business integrations, and retain the assessment and change records.
- 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
Do not assume an application uses the system XML library. Keep network access and parser resource controls appropriate to the application. CVSS values are the authority-provided per-CVE scores, not a score for the whole update. Retain the advisory, inventory, approval, package and validation records.
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
- Red Hat CSAF evidence: rhsa-2026_93470.json
- Red Hat CSAF evidence: rhsa-2026_93473.json
- Red Hat CSAF evidence: rhsa-2026_93463.json
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.
