Medium6.1Red Hat & Ubuntu Linux
Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component
CVE-2026-7321 Published Apr 28, 2026
CVE-2026-7321
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. Red Hat rates this moderate (CVSS 6.1). Weakness: CWE-501. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:19370 — update the affected packages (`sudo dnf update`).
Affected versions
- firefox-0:140.10.1-1.el9_4
- thunderbird-0:140.10.1-1.el9_6
- firefox-0:140.10.1-1.el8_4
- thunderbird-0:140.10.1-1.el8_6
- thunderbird-0:140.10.1-1.el9_4
- firefox-0:140.10.1-1.el9_6
- firefox-0:140.10.1-1.el10_2
- thunderbird-0:140.10.1-1.el8_4
- firefox-0:140.10.1-1.el8_6
- firefox-0:140.10.1-1.el9_0
- thunderbird-0:140.10.1-1.el9_8
- firefox-0:140.10.1-1.el9_2
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
- RHSA-2026:19370
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:19370 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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