---
id: CVE-2026-43321
title: 'bpf: Properly mark live registers for indirect jumps'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Properly mark live registers for indirect jumps

  For a `gotox rX` instruction the rX register should be marked as used
  in the compute_insn_live_regs() function. Fi…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 493d9e0d608339a32f568504d5fd411a261bb0af <
    7beae54111c34ca63357ef120e115889b915beb5
  - >-
    Linux >= 493d9e0d608339a32f568504d5fd411a261bb0af <
    d1aab1ca576c90192ba961094d51b0be6355a4d6
  - Linux 6.19
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:16:22.780603Z'
published: '2026-05-08'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:20:38.766Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43321'
references:
  - url: 'https://git.kernel.org/stable/c/7beae54111c34ca63357ef120e115889b915beb5'
  - url: 'https://git.kernel.org/stable/c/d1aab1ca576c90192ba961094d51b0be6355a4d6'
tags:
  - cve.org
epss: 0.00165
epssPercentile: 0.05354
ingestedAt: '2026-10-16T17:24:46.691Z'
---

## Overview

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

bpf: Properly mark live registers for indirect jumps

For a `gotox rX` instruction the rX register should be marked as used
in the compute_insn_live_regs() function. Fix this.

## Affected

- `Linux >= 493d9e0d608339a32f568504d5fd411a261bb0af < 7beae54111c34ca63357ef120e115889b915beb5`
- `Linux >= 493d9e0d608339a32f568504d5fd411a261bb0af < d1aab1ca576c90192ba961094d51b0be6355a4d6`
- `Linux 6.19`

## Remediation

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