{"id":"CVE-2026-93270","published":"2026-09-24T16:17:24.020","lastModified":"2026-09-24T16:17:24.020","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Disallow interpreter fallback for BPF_ADDR_PERCPU insn\n\nThe BPF_MOV64_PERCPU_REG insn requires JIT to emit native code to for\n'dst_reg = src_reg + <percpu_base_off>'.\n\nHowever, the interpreter ignores the 'off' at its ALU64_MOV_X label.\nThe 'off' indicates the insn is BPF_MOV64_PERCPU_REG insn. Then, when\nthe interpreter loads memory from the register, it will hit a page\nfault.\n\n[    2.545572] BUG: unable to handle page fault for address: ffffffffacaaf034\n[    2.546485] #PF: supervisor read access in kernel mode\n[    2.547167] #PF: error_code(0x0000) - not-present page\n[    2.547850] PGD 134e63067 P4D 134e63067 PUD 134e64063 PMD 10021c063 PTE 800ffffeca550062\n[    2.548912] Oops: Oops: 0000 [#1] SMP PTI\n\nSet jit_required as true in order to disallow interpreter fallback in\ncore.c::__bpf_prog_select_runtime(), if any BPF_ADDR_PERCPU insn is\npatched to the prog.\n\nBTW, rename the helper bpf_map_supports_cpu_flags() to\nbpf_map_is_percpu_map().","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/57cf929a33cb76be3f24886073ae820b4c496914","tags":[]},{"url":"https://git.kernel.org/stable/c/7a0855e73757ee9cf25ba635a1c735018ecba742","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}