Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved: x86/fred: Correct speculative safety in fred_extint() array_index_nospec() is no use if the result gets spilled to the stack, as it makes the believed safe-under-speculation value subject to memory predictions. For all practical purposes, this means array_index_nospec() must be used in the expression that accesses the array. As the code currently stands, it’s the wrong side of irqentry_enter(), and ‘index’ is put into %ebp across the function call. Remove the index variable and reposition array_index_nospec(), so it’s calculated immediately before the array access. A flaw was found in the Linux kernel. This vulnerability affects the handling of speculative execution, a technique used by modern processors to improve performance. A protection mechanism intended to prevent information leakage can be bypassed when its result is temporarily stored in memory, making it vulnerable to memory prediction attacks. This could allow a local attacker to potentially gain access to sensitive information or circumvent security safeguards.Details
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| Debian 13 | Planned | — |