CVE-2026-63855High· 7.8▾ TwilightIn 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 fen…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Last analysed / modified upstream
0.2% → 0.2%
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)
Linux >= 28c17d72072b7ce5cc13a527dcbfc045cc995e7d < 2c6fb056567efb49f8674108b86088a1cfaa86d0Linux >= 28c17d72072b7ce5cc13a527dcbfc045cc995e7d < 8f0ea4524dc71c6c9ec97f2711f46e12f624140fLinux >= 28c17d72072b7ce5cc13a527dcbfc045cc995e7d < 602d4c5872b25ddd4d82fb2025efb9a05b187bb3Linux >= 28c17d72072b7ce5cc13a527dcbfc045cc995e7d < 5a3c6f76cab164a5d803084908d7050f649ab7f9Linux >= 28c17d72072b7ce5cc13a527dcbfc045cc995e7d < 4f317863a3ab212a027d8c8c3cc3af4e3fb95704Linux 5.4Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-99118Nonedrm/i915/dmc: Harden DMC firmware payload parsing
CVE-2026-99117Nonenet: bridge: mcast: don't truncate the port group walk on teardown
CVE-2026-99121Noneipv4: avoid divide by zero in fib_rebalance
CVE-2026-99120NoneKVM: x86/mmu: Cope with the SS bit being set in #NPF exit codes
CVE-2026-99119Nonedrm/amdgpu/userq: actually validate userq BOs
CVE-2026-99123Nonevsock/virtio: validate packet source for connected sockets