CVE-2026-63855
Last modified
CVE-2026-63855 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v2.5 enc/dec rings VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit efc9dd5590894109bce9a0bfe1fa5592dd6b20b1). EPSS estimates a 0.12% chance of exploitation in the next 30 days.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v2.5 enc/dec rings VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit efc9dd5590894109bce9a0bfe1fa5592dd6b20b1)
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 28c17d72072b7ce5cc13a527dcbfc045cc995e7d, < 2c6fb056567efb49f8674108b86088a1cfaa86d0; >= 28c17d72072b7ce5cc13a527dcbfc045cc995e7d, < 8f0ea4524dc71c6c9ec97f2711f46e12f624140f; >= 28c17d72072b7ce5cc13a527dcbfc045cc995e7d, < 602d4c5872b25ddd4d82fb2025efb9a05b187bb3; >= 28c17d72072b7ce5cc13a527dcbfc045cc995e7d, < 5a3c6f76cab164a5d803084908d7050f649ab7f9; >= 28c17d72072b7ce5cc13a527dcbfc045cc995e7d, < 4f317863a3ab212a027d8c8c3cc3af4e3fb95704 |
| Linux | Linux | 5.4 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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