CVE-2026-53242

Kernel panic via orphaned ALSA wait entry

Published Jun 25, 2026 · Updated Jun 25, 2026

Wait-queue corruption in the Linux Kernel ALSA PCM subsystem allows local users to trigger a kernel panic through character-device ioctls. snd_pcm_drain() can conditionally skip remove_wait_queue after a concurrent UNLINK, leaving an entry linked to an old sleep queue before adding it to another queue. Access to ALSA PCM device nodes and concurrent LINK, UNLINK, and DRAIN operations are required; successful triggering crashes the host.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Wait-queue corruption in the Linux Kernel ALSA PCM subsystem allows local users to trigger a kernel panic through character-device ioctls. snd_pcm_drain() can conditionally skip remove_wait_queue after a concurrent UNLINK, leaving an entry linked to an old sleep queue before adding it to another queue. Access to ALSA PCM device nodes and concurrent LINK, UNLINK, and DRAIN operations are required; successful triggering crashes the host.

The record

CVE
CVE-2026-53242
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4a758e9a1f5ed722f83c4dd35f867fe811553bcb <cd98837db15f323463b8df07282ac723bd5c3fed
  2. Affected versionversion=5.10.253 <5.10.259
  3. Affected versionversion=6.1.167 <6.1.176
  4. Affected versionversion=6.12.78 <6.12.94
  5. Affected versionversion=6.18.19 <6.18.36
  6. Affected versionversion=6.19.9 <6.20
  7. Affected versionversion=629cf09464cf98670996ea5c191dc9743e6f3f00 <d68b621bb5a48051932f1017a6e1bc9b18f854d0
  8. Affected versionversion=6.6.130 <6.6.143
  9. Affected versionversion=7.0
  10. Affected versionversion=9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 <7c71a9522555ff137a9ca36b15d759ca04d84788
  11. Affected versionversion=9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 <88fe2e3658726cb21ff2dcf9770bf672f9b9d31b
  12. Affected versionversion=9baee36e8c5443411c4629afabafaff8a46a23fd <cac5bf3500ee6422cf64e0df0b5daeecfed42917
  13. Affected versionversion=ae8f8d30d334bad5b1b3cdb1eb8a0b771f55e432 <b053fcd8912f06c30f932f5b8ec41c72de474695
  14. Affected versionversion=c2f64e05a0587a83ec42dbd6b7a7ded79b2ff694
  15. Affected versionversion=fc71f888994569f87d5bee20b1ac6c9c1e3a7a79 <d842f26a167e77a36f3ed333b9fa99d36ef99fe6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4a758e9a1f5ed722f83c4dd35f867fe811553bcb <cd98837db15f323463b8df07282ac723bd5c3fed; version=5.10.253 <5.10.259; version=6.1.167 <6.1.176; version=6.12.78 <6.12.94; version=6.18.19 <6.18.36; version=6.19.9 <6.20; version=629cf09464cf98670996ea5c191dc9743e6f3f00 <d68b621bb5a48051932f1017a6e1bc9b18f854d0; version=6.6.130 <6.6.143; version=7.0; version=9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 <7c71a9522555ff137a9ca36b15d759ca04d84788; version=9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 <88fe2e3658726cb21ff2dcf9770bf672f9b9d31b; version=9baee36e8c5443411c4629afabafaff8a46a23fd <cac5bf3500ee6422cf64e0df0b5daeecfed42917; version=ae8f8d30d334bad5b1b3cdb1eb8a0b771f55e432 <b053fcd8912f06c30f932f5b8ec41c72de474695; version=c2f64e05a0587a83ec42dbd6b7a7ded79b2ff694; version=fc71f888994569f87d5bee20b1ac6c9c1e3a7a79 <d842f26a167e77a36f3ed333b9fa99d36ef99fe6

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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