---
id: CVE-2026-53083
title: 'bpf: Fix RCU stall in bpf_fd_array_map_clear()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  bpf: Fix RCU stall in bpf_fd_array_map_clear()

  Add a missing cond_resched() in bpf_fd_array_map_clear() loop.

  For PROG_ARRAY maps with many entries this loop calls
  pr…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 <
    419878a48085e6d5c2fcc4912eeaac2f8abf36ed
  - >-
    Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 <
    b1f7158a86f3cbac4d5a32beb55ca0f8027d44cd
  - >-
    Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 <
    71ddb7defc442ab38c53123c384fedbfd8410a15
  - >-
    Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 <
    e1ed678855e315f90c70c1723e94157a9a82e660
  - >-
    Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 <
    67bdb4b0d26f2d6bbf1798a925ef5a3b9ed7357a
  - >-
    Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 <
    4406942e65ca128c56c67443832988873c21d2e9
  - Linux 5.5
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:18:02.802733Z'
published: '2026-06-24'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:23:58.684Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-53083'
references:
  - url: 'https://git.kernel.org/stable/c/419878a48085e6d5c2fcc4912eeaac2f8abf36ed'
  - url: 'https://git.kernel.org/stable/c/b1f7158a86f3cbac4d5a32beb55ca0f8027d44cd'
  - url: 'https://git.kernel.org/stable/c/71ddb7defc442ab38c53123c384fedbfd8410a15'
  - url: 'https://git.kernel.org/stable/c/e1ed678855e315f90c70c1723e94157a9a82e660'
  - url: 'https://git.kernel.org/stable/c/67bdb4b0d26f2d6bbf1798a925ef5a3b9ed7357a'
  - url: 'https://git.kernel.org/stable/c/4406942e65ca128c56c67443832988873c21d2e9'
tags:
  - cve.org
epss: 0.00162
epssPercentile: 0.05464
ingestedAt: '2026-11-05T15:02:32.352Z'
---

## Overview

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

bpf: Fix RCU stall in bpf_fd_array_map_clear()

Add a missing cond_resched() in bpf_fd_array_map_clear() loop.

For PROG_ARRAY maps with many entries this loop calls
prog_array_map_poke_run() per entry which can be expensive, and
without yielding this can cause RCU stalls under load:

  rcu: Stack dump where RCU GP kthread last ran:
  CPU: 0 UID: 0 PID: 30932 Comm: kworker/0:2 Not tainted 6.14.0-13195-g967e8def1100 #2 PREEMPT(undef)
  Workqueue: events prog_array_map_clear_deferred
  RIP: 0010:write_comp_data+0x38/0x90 kernel/kcov.c:246
  Call Trace:
   <TASK>
   prog_array_map_poke_run+0x77/0x380 kernel/bpf/arraymap.c:1096
   __fd_array_map_delete_elem+0x197/0x310 kernel/bpf/arraymap.c:925
   bpf_fd_array_map_clear kernel/bpf/arraymap.c:1000 [inline]
   prog_array_map_clear_deferred+0x119/0x1b0 kernel/bpf/arraymap.c:1141
   process_one_work+0x898/0x19d0 kernel/workqueue.c:3238
   process_scheduled_works kernel/workqueue.c:3319 [inline]
   worker_thread+0x770/0x10b0 kernel/workqueue.c:3400
   kthread+0x465/0x880 kernel/kthread.c:464
   ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
   ret_from_fork_asm+0x19/0x30 arch/x86/entry/entry_64.S:245
   </TASK>

## Affected

- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 419878a48085e6d5c2fcc4912eeaac2f8abf36ed`
- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < b1f7158a86f3cbac4d5a32beb55ca0f8027d44cd`
- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 71ddb7defc442ab38c53123c384fedbfd8410a15`
- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < e1ed678855e315f90c70c1723e94157a9a82e660`
- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 67bdb4b0d26f2d6bbf1798a925ef5a3b9ed7357a`
- `Linux >= da765a2f599304a81a25e77908d1790414ecdbb6 < 4406942e65ca128c56c67443832988873c21d2e9`
- `Linux 5.5`

## Remediation

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