CVE-2026-46157

Local PCM state corruption via trigger-field race

Published May 28, 2026 · Updated May 28, 2026

Data race in the ALSA PCM OSS layer in Linux Kernel 2.6.12 through 7.1-rc1 allows local users to corrupt PCM runtime state. The snd_pcm_oss_get_trigger() and snd_pcm_oss_poll() paths access the runtime.oss.trigger bit field without params_lock, allowing a concurrent write to overwrite neighboring bits. Low-privileged local access to the enabled ALSA OSS PCM interface is required; the documented result is corrupted state that disrupts PCM operation.

CVSS severity7.8
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data race in the ALSA PCM OSS layer in Linux Kernel 2.6.12 through 7.1-rc1 allows local users to corrupt PCM runtime state. The snd_pcm_oss_get_trigger() and snd_pcm_oss_poll() paths access the runtime.oss.trigger bit field without params_lock, allowing a concurrent write to overwrite neighboring bits. Low-privileged local access to the enabled ALSA OSS PCM interface is required; the documented result is corrupted state that disrupts PCM operation.

The record

CVE
CVE-2026-46157
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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 <6.12.88
  2. Affected versionversion=0 <6.18.30
  3. Affected versionversion=0 <7.0.7
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <49f9d048845be874df7997e4b1ce662de450c4b6
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6b01c1bc9a4748ab37548a700a8aaff910e298e6
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <901ac0ff15edf9503162e2cf6579bd11a30f1ed4
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ac3e9b55b7da6f0be51720bd330a0edc1a8b61f1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <6.12.88; version=0 <6.18.30; version=0 <7.0.7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <49f9d048845be874df7997e4b1ce662de450c4b6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6b01c1bc9a4748ab37548a700a8aaff910e298e6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <901ac0ff15edf9503162e2cf6579bd11a30f1ed4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ac3e9b55b7da6f0be51720bd330a0edc1a8b61f1

Published CVSS scores

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

No sourced classifications are available.

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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