---
id: CVE-2026-93219
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  clocksource/drivers/timer-sun4i: Advertise a real minimum delta

  sun4i_clkevt_next_event() compensates for the timer stop/start
  synchronization delay by programming evt…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  clocksource/drivers/timer-sun4i: Advertise a real minimum delta

  sun4i_clkevt_next_event() compensates for the timer stop/start
  synchronization delay by programming evt…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 12e1480bcb4920c1b02b3793cb48756497919a60 <
    0cc4b14d7401d50e53a01f1554147ee075ee6943
  - >-
    Linux >= 12e1480bcb4920c1b02b3793cb48756497919a60 <
    53a3bc024b8e5d284468cce84957cded5f859f98
  - >-
    Linux >= 12e1480bcb4920c1b02b3793cb48756497919a60 <
    753a220084dfc4d737f2ab9eaddc9a01a397edd7
  - >-
    Linux >= 12e1480bcb4920c1b02b3793cb48756497919a60 <
    ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44
  - >-
    Linux >= 12e1480bcb4920c1b02b3793cb48756497919a60 <
    151eb52f8712017c8f7b00bb2305e8916cb9e3dc
  - >-
    Linux >= 12e1480bcb4920c1b02b3793cb48756497919a60 <
    bf38be01d43c4e4ca903aff7236d8486a950a252
  - >-
    Linux >= 12e1480bcb4920c1b02b3793cb48756497919a60 <
    f0efafcdf6eec1f3361bfd8c811420198f55c8bb
  - >-
    Linux >= 12e1480bcb4920c1b02b3793cb48756497919a60 <
    d21808328225ab8cee46885bf9a0dffcefbe630e
  - Linux 3.13
published: '2026-09-24'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T16:17:17.030'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93219'
references:
  - url: 'https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T15:45:56.668Z'
---

## Overview

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

clocksource/drivers/timer-sun4i: Advertise a real minimum delta

sun4i_clkevt_next_event() compensates for the timer stop/start
synchronization delay by programming evt - TIMER_SYNC_TICKS into the
hardware interval register. The clockevent device currently advertises
TIMER_SYNC_TICKS as min_delta_ticks, so the clockevents core is allowed
to call set_next_event() with evt == TIMER_SYNC_TICKS.

That programs a zero-tick interval. With oneshot/highres/nohz timer
operation this can leave the next event stuck, which was observed as a
boot hang on Allwinner D1 after the clockevents core started reusing
forced minimum-delta events.

Advertise one extra tick instead, so the smallest event accepted by the
core still programs at least one hardware tick after the synchronization
compensation.

## Remediation

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