CVE-2026-50257
CVE-2026-50257: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.8
High [CVE-2026-50257] use-after-free in miSyncDestroyFence()
CVE-2026-50257Source published
use-after-free in miSyncDestroyFence(). Red Hat rates this important (CVSS 7.8). Weakness: CWE-416. Affected package(s): xorg-x11-server, xorg-x11-server-Xwayland, tigervnc. Resolved in Red Hat advisory RHSA-2026:26562 — update the affected packages (`sudo dnf update`).
- Affected products in this advisory
- Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Enterprise Linux 7 Extended Lifecycle Support
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
8 more entries in the full advisory.
- Source-reported affected versions
- xorg-x11-server-0:1.20.11-34.el9_8.2
- xorg-x11-server-Xwayland-0:21.1.3-20.el8_10.2
- tigervnc-0:1.15.0-7.el9_8.2
- xorg-x11-server-Xwayland-0:24.1.9-4.el9_8.2
3 more entries in the full advisory.
- Source-reported fixed versions
- RHSA-2026:26562
- Mitigation guidance
- Update the affected package(s) to the fixed version shipped in RHSA-2026:26562 (`sudo dnf update` / `yum update`).
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