Red Hat Fixes Wireshark SPDY Dissector on RHEL 8
Tech GuruQuick Answer
CVE-2026-95387 addresses a heap-based buffer overflow in the SPDY dissector that can cause denial of service. 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 Wireshark and tshark builds, capture-analysis jobs and sources of supplied packet captures. 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 analysis tools and automated workers after updating. Verify packet capture opening, required dissectors and analysis automation; 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 | Wireshark on RHEL 8 AppStream/CRB |
|---|---|
| Advisory | RHSA-2026:93627 |
| CVE | CVE-2026-95387 |
| Authoritative release date | 2026-11-02T12:21:46Z |
| Authority revision date | 2026-11-02T12:24:55Z (latest authority revision) |
| Affected versions | Advisory-listed packages or images before the applicable fixed build on Red Hat Enterprise Linux AppStream (v. 8); Red Hat Enterprise Linux CRB (v. 8). |
| Fixed version | wireshark-1:2.6.2-22.el8_10.src |
| CVSS base score | 8.1 (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-2026:93627 | Released 2026-11-02T12:21:46Z; revised 2026-11-02T12:24:55Z. Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8). Fixed source-package families: wireshark-1:2.6.2-22.el8_10.src. CVSS 8.1 (CVSS v3.1; CVE-specific); High. Vendor rating: Important. |
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What Changed
CVE-2026-95387 addresses a heap-based buffer overflow in the SPDY dissector that can cause denial of service.
What To Validate Now
- Inventory. Record Wireshark and tshark builds, capture-analysis jobs and sources of supplied packet captures.
- 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 analysis tools and automated workers after updating.
- Validate. Verify packet capture opening, required dissectors and analysis automation; 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
Treat capture files as untrusted input and avoid analysis with unnecessary privileges. 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.
