---
id: CVE-2026-98058
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Mark syscall helpers as sleepable

  bpf_sys_bpf() executes the bpf(2) syscall body, which can take mutexes,
  allocate with GFP_KERNEL, and wait for an RCU grace peri…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Mark syscall helpers as sleepable

  bpf_sys_bpf() executes the bpf(2) syscall body, which can take mutexes,
  allocate with GFP_KERNEL, and wait for an RCU grace peri…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 79a7f8bdb159d9914b58740f3d31d602a6e4aca8 <
    3408e98f06ce06ea6a58ca6c39da9c23f0029c06
  - >-
    Linux >= 79a7f8bdb159d9914b58740f3d31d602a6e4aca8 <
    d05524794240b52fdc3b6c1220dd05505715824d
  - Linux 5.14
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:34.767'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98058'
references:
  - url: 'https://git.kernel.org/stable/c/3408e98f06ce06ea6a58ca6c39da9c23f0029c06'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d05524794240b52fdc3b6c1220dd05505715824d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.844Z'
---

## Overview

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

bpf: Mark syscall helpers as sleepable

bpf_sys_bpf() executes the bpf(2) syscall body, which can take mutexes,
allocate with GFP_KERNEL, and wait for an RCU grace period.
bpf_sys_close() reaches close_fd() and filp_close(), which can sleep as
well.

Both helpers are limited to BPF_PROG_TYPE_SYSCALL, whose main program is
sleepable. That does not make every callback sleepable: a syscall program
can register a bpf_timer callback, and the verifier checks that callback
in a non-sleepable context while retaining the syscall helper set.

Without .might_sleep on the prototypes, such a callback can invoke
bpf_sys_bpf() from hrtimer softirq context and trigger a
scheduling-while-atomic failure. bpf_sys_close() is exposed through the
same missing context check.

Set .might_sleep on both prototypes so the existing helper-context check
rejects them from timer callbacks and other atomic regions. Calls from the
sleepable main body remain valid.

## Remediation

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