Red Hat Fixes libsoup in RHEL 10.0 and 8.6 Support Streams
Tech GuruQuick Answer
The updates address WebSocket memory corruption; the RHEL 10.0 libsoup3 advisory also covers data-URI decoding and compression handling. Confirm the exact supported stream and installed build, apply the corresponding erratum, validate operations, and retain evidence.
Confirm Scope And Apply The Supported Remediation
What to do now: Record HTTP-library packages, dependent applications, WebSocket consumers and exact support streams. Match the documented versions, enabled features and attack prerequisites to the deployment before assigning applicability. Install the applicable signed update from the entitled Red Hat repository, preserving the package epoch, architecture and support stream. Restart dependent applications so they load the updated library. Verify WebSocket traffic, proxy authentication, data-URI processing and application health; retain installed and active versions, test results 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 | libsoup3 on RHEL 10.0 EUS and libsoup on RHEL 8.6 AUS/EUS Extension |
|---|---|
| Advisory | RHSA-2026:93583 / RHSA-2026:93716 |
| CVEs | CVE-2026-102555, CVE-2026-102556, CVE-2026-102557, CVE-2026-102558, CVE-2026-102559, CVE-2026-102560 |
| Authoritative release date | 2026-11-02T12:50:08Z (latest release in the group; per-advisory dates below) |
| Authority revision date | 2026-11-02T12:52:35Z (latest authority revision) |
| Affected versions | Advisory-listed packages or images before the applicable fixed build on Red Hat Enterprise Linux AppStream AUS (v.8.6); Red Hat Enterprise Linux AppStream EUS (v. 10.0); Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6); Red Hat Enterprise Linux BaseOS AUS (v.8.6); Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6); Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0). |
| Fixed version | libsoup-0:2.62.3-2.el8_6.14.src; libsoup3-0:3.6.5-3.el10_0.19.src |
| CVSS base score | 8.2-8.6 (CVSS v3.1; CVE-specific) |
| CVSS severity | High |
| Exploitation status | The cited authority does not state that this issue is being maliciously exploited.; no exploitation claim is inferred. |
Authority-Specific Scope And Version Evidence
| RHSA-2026:93583 | Released 2026-11-02T09:00:12Z; revised 2026-11-02T12:52:35Z. Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0). Fixed source-package families: libsoup3-0:3.6.5-3.el10_0.19.src. CVSS 8.2-8.6 (CVSS v3.1; CVE-specific); High. Vendor rating: Important. |
|---|---|
| RHSA-2026:93716 | Released 2026-11-02T12:50:08Z; revised 2026-11-02T12:52:35Z. Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6), Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6). Fixed source-package families: libsoup-0:2.62.3-2.el8_6.14.src. CVSS 8.6 (CVSS v3.1; CVE-specific); High. Vendor rating: Important. |
What Changed
The updates address WebSocket memory corruption; the RHEL 10.0 libsoup3 advisory also covers data-URI decoding and compression handling.
What To Validate Now
- Inventory. Record HTTP-library packages, dependent applications, WebSocket consumers and exact support streams.
- Establish applicability. Match the documented versions, enabled features and attack prerequisites to the deployment before assigning applicability.
- Remediate. Install the applicable signed update from the entitled Red Hat repository, preserving the package epoch, architecture and support stream. Restart dependent applications so they load the updated library.
- Validate. Verify WebSocket traffic, proxy authentication, data-URI processing and application health; retain installed and active versions, test results 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
The libsoup and libsoup3 CVE sets and packages differ. System updates do not establish that an application-bundled library is fixed. CVSS values are per-CVE authority scores, not one score assigned to the entire update.
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.
