CVE-2026-98572

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

bpf: Fix immediate JMP JEQ/JNE on MIPS32

An addu instruction was emitted instead of addiu, causing the immediate value 1 to be interpreted as register $at. This made the comparison result invalid when the immediate operand was negative. Note that $at is mapped to BPF REG AX, which is used for constant blinding.

Fix the instruction to use the immediate form.

Found with test bpf on MIPS32r1 emulated by QEMU.