CVE-2026-92517

In the Linux kernel, the following vulnerability has been resolved:

bpf, riscv: Fix extable handling for arena load_acquire

emit_atomic_ld_st() returns 1 to have build_body() skip the zext after

a sub-word load_acquire. The caller does "ret = ret ?:

add_exception_handler(...)", which skips add_exception_handler() on any

non-zero ret, so the extable entry is missing and a faulting

PROBE_ATOMIC load_acquire oopses.

REG_DONT_CLEAR_MARKER leaves rd stale on fault, and the verifier still

thinks the load overwrote it, so a program can leak it through a map.

Check ret >= 0 before calling add_exception_handler(), and pass rd for

LOAD_ACQ so the fault zeroes rd like a PROBE_MEM load. Return ret

unchanged for the zext skip.