SEPTEMBER 8, 2026
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Case File

CVE-2026-63849

HIGH · CVSS 7.8 EPSS 0.13%

Source: NVD + CISA KEV + EPSS · Published 2026-07-19 · Last synced 2026-08-18

CyberRota Analysis

AI-Generated

The vulnerability affects the Linux kernel's VCN encoder and decoder rings, which do not properly handle 64-bit user fence writes, leading to potential denial of service through rejected command submissions. This high-severity flaw could allow attackers to disrupt system operations, making it critical for organizations using affected Linux distributions to prioritize patching. System administrators and security teams should assess their environments for this vulnerability to mitigate potential exploitation risks.

CVE
CVE-2026-63849
Severity
HIGH
CVSS
7.8
EPSS
0.13%
Linux

Original NVD Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 enc ring VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit e16be95a2c3ee712b142cb27d2dca0b461181359)