# CVE-2026-93270: linux: In the Linux kernel, the following vulnerability has been resolved:  bpf: Disallow interpreter fallback for BPF_ADDR_...

CVE-2026-93270 is fixed in linux on 1 platform by DEBIAN-CVE-2026-93270 (version 7.2.6-1), released September 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-93270
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 24, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  bpf: Disallow interpreter fallback for BPF_ADDR_PERCPU insn  The BPF_MOV64_PERCPU_REG insn requires JIT to emit native code to for 'dst_reg = src_reg + <percpu_base_off>'.  However, the interpreter ignores the 'off' at its ALU64_MOV_X label. The 'off' indicates the insn is BPF_MOV64_PERCPU_REG insn. Then, when the interpreter loads memory from the register, it will hit a page fault.  [    2.545572] BUG: unable to handle page fault for address: ffffffffacaaf034 [    2.546485] #PF: supervisor read access in kernel mode [    2.547167] #PF: error_code(0x0000) - not-present page [    2.547850] PGD 134e63067 P4D 134e63067 PUD 134e64063 PMD 10021c063 PTE 800ffffeca550062 [    2.548912] Oops: Oops: 0000 [#1] SMP PTI  Set jit_required as true in order to disallow interpreter fallback in core.c::__bpf_prog_select_runtime(), if any BPF_ADDR_PERCPU insn is patched to the prog.  BTW, rename the helper bpf_map_supports_cpu_flags() to bpf_map_is_percpu_map().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-93270](https://patchblox.com/security/data/fix/linux/debian-cve-2026-93270.md) | Sep 24, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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