Monthly
Information disclosure in AMD Zen processor microarchitecture, surfaced through Windows system software, enables a local low-privileged attacker to read high-sensitivity data across security boundaries. The CVSS Scope Changed metric (S:C) combined with C:H and the AMD Zen tag strongly suggests a microarchitectural side-channel capable of leaking data from outside the attacker's security context - a pattern consistent with speculative execution or cache-based cross-boundary leakage. No public exploit has been identified at time of analysis, and CISA SSVC rates exploitation status as none; however, the breadth of affected Windows versions (Server 2012 R2 through Server 2025 and Windows 10/11 across all supported channels) gives this a wide potential exposure surface on AMD Zen-equipped systems.
Non-Transparent Sharing of Microarchitectural Resources in some Intel(R) NUC BIOS firmware may allow a privileged user to potentially enable information disclosure via local access. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity.
The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. Rated medium severity (CVSS 5.6). Public exploit code available.
Information disclosure in AMD Zen processor microarchitecture, surfaced through Windows system software, enables a local low-privileged attacker to read high-sensitivity data across security boundaries. The CVSS Scope Changed metric (S:C) combined with C:H and the AMD Zen tag strongly suggests a microarchitectural side-channel capable of leaking data from outside the attacker's security context - a pattern consistent with speculative execution or cache-based cross-boundary leakage. No public exploit has been identified at time of analysis, and CISA SSVC rates exploitation status as none; however, the breadth of affected Windows versions (Server 2012 R2 through Server 2025 and Windows 10/11 across all supported channels) gives this a wide potential exposure surface on AMD Zen-equipped systems.
Non-Transparent Sharing of Microarchitectural Resources in some Intel(R) NUC BIOS firmware may allow a privileged user to potentially enable information disclosure via local access. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity.
The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. Rated medium severity (CVSS 5.6). Public exploit code available.