CVE-2026-23354
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…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 6.9.1 before 6.12.77 from 6.13 before 6.18.17 from 6.19 before 6.19.7 Versions 6.9, 7.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643
- https://git.kernel.org/stable/c/92caa5274b99cb6729177232a029ce0dfa6c5f7b
- https://git.kernel.org/stable/c/aa280a08e7d8fae58557acc345b36b3dc329d595
- https://git.kernel.org/stable/c/e58f1a9b0677de24dcfee0b21393446ec92ff120