---
id: CVE-2026-63999
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ethtool: rss: fix indir_table and hkey leak on get_rxfh failure

  rss_prepare_get() allocates the indirection table and hash key buffer
  via rss_get_data_alloc(), then ca…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ethtool: rss: fix indir_table and hkey leak on get_rxfh failure

  rss_prepare_get() allocates the indirection table and hash key buffer
  via rss_get_data_alloc(), then ca…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-401
  - CWE-772
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 5.15.181, < 5.16'
  - 'linux_kernel >= 6.1.135, < 6.2'
  - 'linux_kernel >= 6.6.88, < 6.7'
  - 'linux_kernel >= 6.12.24, < 6.13'
  - 'linux_kernel >= 6.13.12, < 6.14'
  - 'linux_kernel >= 6.14.3, < 6.15'
  - 'linux_kernel >= 6.15.1, < 6.18.35'
  - 'linux_kernel >= 6.19, < 7.0.12'
  - linux_kernel = 6.15
  - linux_kernel = 7.1
patched:
  - linux_kernel 7.0.12
published: '2026-07-19'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T15:49:03.000'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63999'
references:
  - url: 'https://git.kernel.org/stable/c/266297692f97008ca48bc311775c087c59bd7fe3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/33d05c22d6f227c5ae171c46df2f6f8bf48047ea'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/80d95d92f828cfcace955d673637d944178b435f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63999.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-63999'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2502445'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-63999'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63999'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026071906-CVE-2026-63999-6f50@gregkh/T
  - url: 'https://git.kernel.org/stable/c/14dbf22c397b799b3a80f63fc90c2fc0585bbeb3'
  - url: 'https://git.kernel.org/stable/c/323faef6366349f57d4ad67d318a0c8906e360b3'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00122
epssPercentile: 0.01947
ingestedAt: '2026-10-08T15:49:37.973Z'
---

## Overview

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

ethtool: rss: fix indir_table and hkey leak on get_rxfh failure

rss_prepare_get() allocates the indirection table and hash key buffer
via rss_get_data_alloc(), then calls ops->get_rxfh() to populate them.
If get_rxfh() fails, the function returns an error without freeing
the allocation.

## Affected

- `linux_kernel >= 5.15.181, < 5.16`
- `linux_kernel >= 6.1.135, < 6.2`
- `linux_kernel >= 6.6.88, < 6.7`
- `linux_kernel >= 6.12.24, < 6.13`
- `linux_kernel >= 6.13.12, < 6.14`
- `linux_kernel >= 6.14.3, < 6.15`
- `linux_kernel >= 6.15.1, < 6.18.35`
- `linux_kernel >= 6.19, < 7.0.12`
- `linux_kernel = 6.15`
- `linux_kernel = 7.1`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.12`

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63999.json)