CVE-2026-98048
Summary
by MITRE • 09/25/2026
In the Linux kernel, the following vulnerability has been resolved:
bpf: don't rewrite bpf_fastcall patterns entered by a jump
mark_fastcall_pattern_for_call() must ensure that matched "spill; call; fill" instruction series is not interrupted by a jump. Otherwise the rewrite applied by bpf_remove_fastcall_spills_fills() is not sound.
Record the instructions targeted by jumps in insn_aux_data[*].jump_target when the CFG is built and use this flag
to stop growing a pattern at such an instruction. Jumps to the first spill are fine.
Note that existing insn_aux_data[*].jmp_point field can't be reused,
as it marks subprogram return instructions.
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