---
id: CVE-2026-93135
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Reject programs with inlined helpers if JIT is not available

  When an architecture (such as LoongArch, ARM64, and RISC-V) implements
  bpf_jit_inlines_helper_call(),…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Reject programs with inlined helpers if JIT is not available

  When an architecture (such as LoongArch, ARM64, and RISC-V) implements
  bpf_jit_inlines_helper_call(),…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 2ddec2c80b4402c293c7e6e0881cecaaf77e8cec <
    21c6445366795fa3a89954e1d318e7c8afdef843
  - >-
    Linux >= 2ddec2c80b4402c293c7e6e0881cecaaf77e8cec <
    f1c27922576edccb99d0257827d09bd05c0304a6
  - Linux 6.10
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:18:08.373'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93135'
references:
  - url: 'https://git.kernel.org/stable/c/21c6445366795fa3a89954e1d318e7c8afdef843'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f1c27922576edccb99d0257827d09bd05c0304a6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.746Z'
epss: 0.00198
epssPercentile: 0.08434
---

## Overview

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

bpf: Reject programs with inlined helpers if JIT is not available

When an architecture (such as LoongArch, ARM64, and RISC-V) implements
bpf_jit_inlines_helper_call(), the verifier skips rewriting the helper
call offset (insn->imm) in bpf_do_misc_fixups(). This is because the
helper is expected to be inlined by the JIT compiler later. Therefore,
insn->imm remains as the raw helper enum ID.

However, if JIT is disabled at runtime (net.core.bpf_jit_enable=0) or
if JIT compilation fails dynamically (e.g., due to OOM), the program
falls back to the BPF interpreter.

When the interpreter executes (__bpf_call_base + insn->imm) with the
unpatched raw ID, it jumps into an invalid address space, triggering
an instruction alignment fault or a kernel panic.

Although these helpers have valid C implementations in the kernel, the
omission of offset rewriting makes runtime interpreter fallback fatal.

Fix this by setting 'prog->jit_required = 1' when helper call rewriting
is skipped for JIT inlining. This ensures that such programs are safely
rejected if JIT is not available, preventing the runtime kernel panic.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.