CVE-2024-26654

Local privilege escalation via AICA cleanup race

Published Apr 1, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel AICA ALSA driver allows local users to gain kernel privileges through PCM playback and close operations. During snd_aicapcm_pcm_close(), del_timer() fails to wait for a running timer, which can reschedule spu_dma_work after aica_channel is freed. Access to the Dreamcast AICA PCM device is required; winning the close-time race permits kernel-memory disclosure or modification and can panic the system.

CVSS severity7.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel AICA ALSA driver allows local users to gain kernel privileges through PCM playback and close operations. During snd_aicapcm_pcm_close(), del_timer() fails to wait for a running timer, which can reschedule spu_dma_work after aica_channel is freed. Access to the Dreamcast AICA PCM device is required; winning the close-time race permits kernel-memory disclosure or modification and can panic the system.

The record

CVE
CVE-2024-26654
Published
Apr 1, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=198de43d758ca2700e2b52b49c0b189b4931466c <051e0840ffa8ab25554d6b14b62c9ab9e4901457
  2. Affected versionversion=198de43d758ca2700e2b52b49c0b189b4931466c <3c907bf56905de7d27b329afaf59c2fb35d17b04
  3. Affected versionversion=198de43d758ca2700e2b52b49c0b189b4931466c <4206ad65a0ee76920041a755bd3c17c6ba59bba2
  4. Affected versionversion=198de43d758ca2700e2b52b49c0b189b4931466c <61d4787692c1fccdc268ffa7a891f9c149f50901
  5. Affected versionversion=198de43d758ca2700e2b52b49c0b189b4931466c <8c990221681688da34295d6d76cc2f5b963e83f5
  6. Affected versionversion=198de43d758ca2700e2b52b49c0b189b4931466c <9d66ae0e7bb78b54e1e0525456c6b54e1d132046
  7. Affected versionversion=198de43d758ca2700e2b52b49c0b189b4931466c <aa39e6878f61f50892ee2dd9d2176f72020be845
  8. Affected versionversion=198de43d758ca2700e2b52b49c0b189b4931466c <e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3
  9. Affected versionversion=198de43d758ca2700e2b52b49c0b189b4931466c <eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2
  10. Affected versionversion=2.6.23

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=198de43d758ca2700e2b52b49c0b189b4931466c <051e0840ffa8ab25554d6b14b62c9ab9e4901457; version=198de43d758ca2700e2b52b49c0b189b4931466c <3c907bf56905de7d27b329afaf59c2fb35d17b04; version=198de43d758ca2700e2b52b49c0b189b4931466c <4206ad65a0ee76920041a755bd3c17c6ba59bba2; version=198de43d758ca2700e2b52b49c0b189b4931466c <61d4787692c1fccdc268ffa7a891f9c149f50901; version=198de43d758ca2700e2b52b49c0b189b4931466c <8c990221681688da34295d6d76cc2f5b963e83f5; version=198de43d758ca2700e2b52b49c0b189b4931466c <9d66ae0e7bb78b54e1e0525456c6b54e1d132046; version=198de43d758ca2700e2b52b49c0b189b4931466c <aa39e6878f61f50892ee2dd9d2176f72020be845; version=198de43d758ca2700e2b52b49c0b189b4931466c <e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3; version=198de43d758ca2700e2b52b49c0b189b4931466c <eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2; version=2.6.23

Published CVSS scores

7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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