Threats Tagged 'ghsa-vx2x-82ww-5r7r'
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Threats Tagged 'ghsa-vx2x-82ww-5r7r'
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A vulnerability in the Linux kernel's BPF implementation on x86 platforms caused incorrect resolution of per-CPU addresses into extended registers. This flaw led to the use of wrong registers during per-CPU address MOV instructions, resulting in kernel faults and potential panics when dereferencing invalid pointers. The issue was triggered by a mismatch in how the REX prefix bits were set, causing the destination register to be incorrectly identified. The problem was mainly observed when using GCC for BPF programs, which keeps multiple per-CPU addresses live simultaneously, unlike clang. This vulnerability has been resolved by correcting the instruction encoding to properly handle extended registers. Join the discussion | GCVE Database | 09/11/2026, 21:31:33 UTC Added: 09/12/2026, 00:42:51 UTC |
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