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CVE-2024-26654— ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在释放后重用漏洞。

CVSS 7.8 · High EPSS 0.26% · P16

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 198de43d758ca2700e2b52b49c0b189b4931466c< eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2 affected
198de43d758ca2700e2b52b49c0b189b4931466c< 4206ad65a0ee76920041a755bd3c17c6ba59bba2 affected
198de43d758ca2700e2b52b49c0b189b4931466c< aa39e6878f61f50892ee2dd9d2176f72020be845 affected
198de43d758ca2700e2b52b49c0b189b4931466c< 8c990221681688da34295d6d76cc2f5b963e83f5 affected
198de43d758ca2700e2b52b49c0b189b4931466c< 9d66ae0e7bb78b54e1e0525456c6b54e1d132046 affected
198de43d758ca2700e2b52b49c0b189b4931466c< 61d4787692c1fccdc268ffa7a891f9c149f50901 affected
198de43d758ca2700e2b52b49c0b189b4931466c< e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3 affected
198de43d758ca2700e2b52b49c0b189b4931466c< 3c907bf56905de7d27b329afaf59c2fb35d17b04 affected
… +12 more rows
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I. Basic Information for CVE-2024-26654

Vulnerability Information
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Vulnerability Title
ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在释放后重用漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 198de43d758ca2700e2b52b49c0b189b4931466c ~ eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2 -
Linux Linux 2.6.23 -

II. Public POCs for CVE-2024-26654

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III. Intelligence Information for CVE-2024-26654

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Mailing List Discussions for CVE-2024-26654 (1)

Other References for CVE-2024-26654 (8)

Same Patch Batch · Linux · 2024-04-01 · 3 CVEs total

CVE-2024-26655 Fix memory leak in posix_clock_open()
CVE-2024-26653 usb: misc: ljca: Fix double free in error handling path

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26654

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