CVE-2026-98248
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
arm64: percpu: Fix LSE operations on {8,16}-bit types
The assembly for __percpu_##name##_case_##sz() and
__percpu_##name##_return_case_##sz() doesn't use the 'sfx' macro
argument to form the LSE instruction. Without 'sfx', a W register
argument will imply a 32-bit memory location, and consequently
{8,16}-bit ops will erroneously read and write 32 bits of memory when
the LSE instruction is used.
Fix this by appending 'sfx' to 'op_lse' to LSE instruction. It is not
necessary (and not valid) to append 'sfx' to 'op_llsc', as 'op_llsc' is
a register-register operation which does not access memory (and does not
take a size suffix).
https://git.kernel.org/stable/c/390742871a723b52de9b92a94c0d1c85a2531e3e
https://git.kernel.org/stable/c/843ace1d0a39e9b1cfcbfb3856a7b0fbdd9cd003
https://git.kernel.org/stable/c/8cf2093f5372952a9ebc805c418d45df7112cd14
https://git.kernel.org/stable/c/d69ab4480e49bf925f4781afcc9f284affcb96b6