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VMware Photon OS: CVE-2024-26654

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VMware Photon OS: CVE-2024-26654

Severity
6
CVSS
(AV:L/AC:H/Au:S/C:C/I:C/A:C)
Published
04/01/2024
Created
01/21/2025
Added
01/20/2025
Modified
02/05/2025

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs The dreamcastcard->timer could schedule the spu_dma_work and the spu_dma_work could also arm the dreamcastcard->timer. When the snd_pcm_substream is closing, the aica_channel will be deallocated. But it could still be dereferenced in the worker thread. The reason is that del_timer() will return directly regardless of whether the timer handler is running or not and the worker could be rescheduled in the timer handler. As a result, the UAF bug will happen. The racy situation is shown below: (Thread 1) |(Thread 2) snd_aicapcm_pcm_close()| ... |run_spu_dma() //worker |mod_timer() flush_work() | del_timer()|aica_period_elapsed() //timer kfree(dreamcastcard->channel)|schedule_work() |run_spu_dma() //worker ...|dreamcastcard->channel-> //USE In order to mitigate this bug and other possible corner cases, call mod_timer() conditionally in run_spu_dma(), then implement PCM sync_stop op to cancel both the timer and worker. The sync_stop op will be called from PCM core appropriately when needed.

Solution(s)

  • vmware-photon_os_update_tdnf

References

  • https://attackerkb.com/topics/cve-2024-26654
  • CVE - 2024-26654
  • 查看数 703
  • 已创建
  • 最后回复

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