---
id: CVE-2026-45932
title: 'bpf: Fix tcx/netkit detach permissions when prog fd isn''t given'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Fix tcx/netkit detach permissions when prog fd isn't given

  This commit fixes a security issue where BPF_PROG_DETACH on tcx or
  netkit devices could be executed by …
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e420bed025071a623d2720a92bc2245c84757ecb <
    8e1623e7d61faf16cbadc80550da874303611ff5
  - >-
    Linux >= e420bed025071a623d2720a92bc2245c84757ecb <
    0c249f523175963b0a746bba673ecebdf6cefd86
  - >-
    Linux >= e420bed025071a623d2720a92bc2245c84757ecb <
    4e0772cded109c238411f2fac36ac39302758b81
  - >-
    Linux >= e420bed025071a623d2720a92bc2245c84757ecb <
    3f04cc1e5374da4c5e791ae010a06cfea7bacbe6
  - >-
    Linux >= e420bed025071a623d2720a92bc2245c84757ecb <
    ae23bc81ddf7c17b663c4ed1b21e35527b0a7131
  - Linux 6.6
published: '2026-05-27'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:40:59.729Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-45932'
references:
  - url: 'https://git.kernel.org/stable/c/8e1623e7d61faf16cbadc80550da874303611ff5'
  - url: 'https://git.kernel.org/stable/c/0c249f523175963b0a746bba673ecebdf6cefd86'
  - url: 'https://git.kernel.org/stable/c/4e0772cded109c238411f2fac36ac39302758b81'
  - url: 'https://git.kernel.org/stable/c/3f04cc1e5374da4c5e791ae010a06cfea7bacbe6'
  - url: 'https://git.kernel.org/stable/c/ae23bc81ddf7c17b663c4ed1b21e35527b0a7131'
tags:
  - cve.org
epss: 0.00181
epssPercentile: 0.07281
ingestedAt: '2026-10-21T12:48:53.634Z'
---

## Overview

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

bpf: Fix tcx/netkit detach permissions when prog fd isn't given

This commit fixes a security issue where BPF_PROG_DETACH on tcx or
netkit devices could be executed by any user when no program fd was
provided, bypassing permission checks. The fix adds a capability
check for CAP_NET_ADMIN or CAP_SYS_ADMIN in this case.

## Affected

- `Linux >= e420bed025071a623d2720a92bc2245c84757ecb < 8e1623e7d61faf16cbadc80550da874303611ff5`
- `Linux >= e420bed025071a623d2720a92bc2245c84757ecb < 0c249f523175963b0a746bba673ecebdf6cefd86`
- `Linux >= e420bed025071a623d2720a92bc2245c84757ecb < 4e0772cded109c238411f2fac36ac39302758b81`
- `Linux >= e420bed025071a623d2720a92bc2245c84757ecb < 3f04cc1e5374da4c5e791ae010a06cfea7bacbe6`
- `Linux >= e420bed025071a623d2720a92bc2245c84757ecb < ae23bc81ddf7c17b663c4ed1b21e35527b0a7131`
- `Linux 6.6`

## Remediation

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