Linux
CVE-2026-99186: In the Linux kernel, the following vulnerability has been resolved: x86/insn-eval: Fix shadowed segment index in get_seg_reg_override_idx() Commit 45e1dccc065
CVE-2026-99186 Oct 28, 2026 Source: Vendor
In the Linux kernel, the following vulnerability has been resolved:
x86/insn-eval: Fix shadowed segment index in get_seg_reg_override_idx()
Commit 45e1dccc0653 ("x86/insn: Simplify for_each_insn_prefix()") made
for_each_insn_prefix() declare its own loop counter named idx.
get_seg_reg_override_idx() keeps its result in a local of the same name,
so the assignments in the loop body now write the loop counter:
- the function always returns INAT_SEG_REG_DEFAULT, so FS and GS
overrides are ign
Source of record
The credited names below are quoted verbatim from the vendor's own advisory:
https://nvd.nist.gov/vuln/detail/CVE-2026-99186
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