---
id: CVE-2026-46171
title: 'riscv: kvm: fix vector context allocation leak'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  riscv: kvm: fix vector context allocation leak

  When the second kzalloc (host_context.vector.datap) fails in
  kvm_riscv_vcpu_alloc_vector_context, the first allocation
  (…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 0f4b82579716b12bb88257bd7ea80f25c791fb2c <
    8f3a5dc4055e1001b44ca8ae2bd3eb1d07782049
  - >-
    Linux >= 0f4b82579716b12bb88257bd7ea80f25c791fb2c <
    70ecebe7c58ce01f8da3f513eafb51bd147b1e63
  - >-
    Linux >= 0f4b82579716b12bb88257bd7ea80f25c791fb2c <
    bd62c0f61bc722a097417401030c596cea8e21aa
  - >-
    Linux >= 0f4b82579716b12bb88257bd7ea80f25c791fb2c <
    1d57ab45ec5c0e22789de793bcf2a31ad6fb7d98
  - >-
    Linux >= 0f4b82579716b12bb88257bd7ea80f25c791fb2c <
    b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978
  - Linux 6.5
published: '2026-05-28'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:41:22.651Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-46171'
references:
  - url: 'https://git.kernel.org/stable/c/8f3a5dc4055e1001b44ca8ae2bd3eb1d07782049'
  - url: 'https://git.kernel.org/stable/c/70ecebe7c58ce01f8da3f513eafb51bd147b1e63'
  - url: 'https://git.kernel.org/stable/c/bd62c0f61bc722a097417401030c596cea8e21aa'
  - url: 'https://git.kernel.org/stable/c/1d57ab45ec5c0e22789de793bcf2a31ad6fb7d98'
  - url: 'https://git.kernel.org/stable/c/b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978'
tags:
  - cve.org
epss: 0.0016
epssPercentile: 0.04778
ingestedAt: '2026-10-21T12:48:53.629Z'
---

## Overview

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

riscv: kvm: fix vector context allocation leak

When the second kzalloc (host_context.vector.datap) fails in
kvm_riscv_vcpu_alloc_vector_context, the first allocation
(guest_context.vector.datap) is leaked. Free it before returning.

## Affected

- `Linux >= 0f4b82579716b12bb88257bd7ea80f25c791fb2c < 8f3a5dc4055e1001b44ca8ae2bd3eb1d07782049`
- `Linux >= 0f4b82579716b12bb88257bd7ea80f25c791fb2c < 70ecebe7c58ce01f8da3f513eafb51bd147b1e63`
- `Linux >= 0f4b82579716b12bb88257bd7ea80f25c791fb2c < bd62c0f61bc722a097417401030c596cea8e21aa`
- `Linux >= 0f4b82579716b12bb88257bd7ea80f25c791fb2c < 1d57ab45ec5c0e22789de793bcf2a31ad6fb7d98`
- `Linux >= 0f4b82579716b12bb88257bd7ea80f25c791fb2c < b7c958d7c1eb1cb9b2be7b5ee4129fcd66cec978`
- `Linux 6.5`

## Remediation

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