CVE-2026-53192

Local kernel compromise via ALSA timer race

Published Jun 25, 2026 · Updated Jun 25, 2026

Use-after-free in the ALSA timer subsystem in Linux Kernel allows local users to compromise the kernel through a timer ioctl. The snd_timer_user_params function handles SNDRV_TIMER_IOCTL_PARAMS without register_mutex, allowing a concurrent close to free a timer object that remains in use. Exploitation requires local access to /dev/snd/timer and CONFIG_SND_UTIMER; local users control both the ioctl and close operations.

CVSS severity7.8
High
EPSS probability0.17%
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 ALSA timer subsystem in Linux Kernel allows local users to compromise the kernel through a timer ioctl. The snd_timer_user_params function handles SNDRV_TIMER_IOCTL_PARAMS without register_mutex, allowing a concurrent close to free a timer object that remains in use. Exploitation requires local access to /dev/snd/timer and CONFIG_SND_UTIMER; local users control both the ioctl and close operations.

The record

CVE
CVE-2026-53192
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
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

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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=0 <5.10.259
  2. Affected versionversion=0 <5.15.210
  3. Affected versionversion=0 <6.1.176
  4. Affected versionversion=0 <6.12.94
  5. Affected versionversion=0 <6.18.36
  6. Affected versionversion=0 <6.6.143
  7. Affected versionversion=0 <7.0.13
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <053a401b592be424fea9d57c789f66cd5d8cec11
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <117743d62e1225e208568a3ffc2c07214f1347cb
  10. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <306427adf9b97e29e5958cb9cf3096c6151fc9ff
  11. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <38034d04d4a75bbca01df2b313ced0bcd0fa3242
  12. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3d39da65b5c422c5e5afb7d5651b0698d060a827
  13. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <92ad2d7f80cad43b046f093e808e11fe919d304a
  14. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b2214914e461d0466548a52dfe4f4ee8ce362276
  15. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e2331730175f74169046d2af8db1b47243df7c7a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <5.10.259; version=0 <5.15.210; version=0 <6.1.176; version=0 <6.12.94; version=0 <6.18.36; version=0 <6.6.143; version=0 <7.0.13; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <053a401b592be424fea9d57c789f66cd5d8cec11; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <117743d62e1225e208568a3ffc2c07214f1347cb; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <306427adf9b97e29e5958cb9cf3096c6151fc9ff; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <38034d04d4a75bbca01df2b313ced0bcd0fa3242; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3d39da65b5c422c5e5afb7d5651b0698d060a827; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <92ad2d7f80cad43b046f093e808e11fe919d304a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b2214914e461d0466548a52dfe4f4ee8ce362276; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e2331730175f74169046d2af8db1b47243df7c7a

Published CVSS scores

7.8Linux kernel CNACVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

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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