---
id: CVE-2026-98917
title: 'parisc: Increase kernel stack size to 32kb'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  parisc: Increase kernel stack size to 32kb

  For 64-bit Linux kernels, increase the default kernel stack size
  (THREAD_SIZE_ORDER) to 32 kB, in order to avoid kernel cras…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= da57c5414f49ef9e4bcb9ae0bbafd1d650b31411 <
    5023c70853ad9829c53d8e9def5ee969b4e1b931
  - >-
    Linux >= da57c5414f49ef9e4bcb9ae0bbafd1d650b31411 <
    db45f02b7a5f753efc9003f616dfb5ee4cb6d077
  - >-
    Linux >= da57c5414f49ef9e4bcb9ae0bbafd1d650b31411 <
    94b7e3a7e871ae27d4935c76959dfc61829f27f9
  - Linux ae3471f65a04451f3670cbde6c59e384cca44dc8
  - Linux >= 4.14.24 < 4.15
  - Linux 4.15
published: '2026-10-23'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T06:56:48.902Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98917'
references:
  - url: 'https://git.kernel.org/stable/c/5023c70853ad9829c53d8e9def5ee969b4e1b931'
  - url: 'https://git.kernel.org/stable/c/db45f02b7a5f753efc9003f616dfb5ee4cb6d077'
  - url: 'https://git.kernel.org/stable/c/94b7e3a7e871ae27d4935c76959dfc61829f27f9'
tags:
  - cve.org
epss: 0.00167
epssPercentile: 0.05861
ingestedAt: '2026-10-23T13:24:55.569Z'
---

## Overview

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

parisc: Increase kernel stack size to 32kb

For 64-bit Linux kernels, increase the default kernel stack size
(THREAD_SIZE_ORDER) to 32 kB, in order to avoid kernel crashes which have been
triggered recently when building the debian vtk9 package with gcc 17:

stackcheck: kworker/u128:0 will most likely overflow kernel stack (sp:179a83af0, stk bottom-top:179a80000-179a84000)
Kernel panic - not syncing: low stack detected by irq handler - check messages
CPU: 2 UID: 0 PID: 30760 Comm: kworker/u128:0 Tainted: G W 6.18.46-dirty #1 NONE
Tainted: [W]=WARN
Hardware name: 9000/800/rp3440
Workqueue: writeback wb_workfn (flush-259:0)
Backtrace:
 [<000000004022f050>] show_stack+0x70/0x90
 [<000000004022378c>] dump_stack_lvl+0x124/0x190
 [<000000004022382c>] dump_stack+0x34/0x48
 [<000000004020212c>] vpanic+0x204/0x648
 [<00000000402025c4>] panic+0x54/0x58
 [<0000000040232230>] do_cpu_irq_mask+0x3f8/0x440
 [<0000000040227070>] intr_return+0x0/0xc

## Affected

- `Linux >= da57c5414f49ef9e4bcb9ae0bbafd1d650b31411 < 5023c70853ad9829c53d8e9def5ee969b4e1b931`
- `Linux >= da57c5414f49ef9e4bcb9ae0bbafd1d650b31411 < db45f02b7a5f753efc9003f616dfb5ee4cb6d077`
- `Linux >= da57c5414f49ef9e4bcb9ae0bbafd1d650b31411 < 94b7e3a7e871ae27d4935c76959dfc61829f27f9`
- `Linux ae3471f65a04451f3670cbde6c59e384cca44dc8`
- `Linux >= 4.14.24 < 4.15`
- `Linux 4.15`

## Remediation

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