In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger Currently the… (CVE-2026-46157)
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger Currently the runtime.oss.trigger field may be accessed concurrently without protection, which may lead to the data race. And, in this case, it may lead to more severe problem because it's a bit field; as writing the data, it may overwrite other bit fields as well, which confuses the operation completely, as spotted by fuzzing. Fix it by covering runtime.oss.trigger bit fled also with the existing params_lock mutex in both snd_pcm_oss_get_trigger() and snd_pcm_oss_poll().
AI Analysis
Technical Summary
The Linux kernel ALSA PCM OSS subsystem had a data race vulnerability due to unsynchronized concurrent access to the runtime.oss.trigger bit field. Because this field is a bit field, concurrent writes could overwrite other bits, causing operational confusion. The vulnerability was discovered through fuzzing and fixed by adding protection with the existing params_lock mutex in the snd_pcm_oss_get_trigger() and snd_pcm_oss_poll() functions.
Potential Impact
This vulnerability allows a data race condition that can corrupt the state of the ALSA PCM OSS runtime trigger bit field, potentially leading to incorrect audio subsystem behavior. The CVSS vector indicates local attack complexity with low privileges required and no user interaction, resulting in high confidentiality, integrity, and availability impact.
Mitigation Recommendations
A fix is available and has been applied in Linux kernel versions 6.8.0-1061.64~22.04.1 and later. Users and administrators should update affected Linux kernel versions to these or newer patched releases to remediate the vulnerability.
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger Currently the… (CVE-2026-46157)
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger Currently the runtime.oss.trigger field may be accessed concurrently without protection, which may lead to the data race. And, in this case, it may lead to more severe problem because it's a bit field; as writing the data, it may overwrite other bit fields as well, which confuses the operation completely, as spotted by fuzzing. Fix it by covering runtime.oss.trigger bit fled also with the existing params_lock mutex in both snd_pcm_oss_get_trigger() and snd_pcm_oss_poll().
CVSS v3.1
Score 7.8high
Affected software
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protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resolutepkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel ALSA PCM OSS subsystem had a data race vulnerability due to unsynchronized concurrent access to the runtime.oss.trigger bit field. Because this field is a bit field, concurrent writes could overwrite other bits, causing operational confusion. The vulnerability was discovered through fuzzing and fixed by adding protection with the existing params_lock mutex in the snd_pcm_oss_get_trigger() and snd_pcm_oss_poll() functions.
Potential Impact
This vulnerability allows a data race condition that can corrupt the state of the ALSA PCM OSS runtime trigger bit field, potentially leading to incorrect audio subsystem behavior. The CVSS vector indicates local attack complexity with low privileges required and no user interaction, resulting in high confidentiality, integrity, and availability impact.
Mitigation Recommendations
A fix is available and has been applied in Linux kernel versions 6.8.0-1061.64~22.04.1 and later. Users and administrators should update affected Linux kernel versions to these or newer patched releases to remediate the vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-46157
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:16.04:LTS","Ubuntu:Pro:FIPS:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:FIPS-updates:18.04:LTS","Ubuntu:Pro:FIPS:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates:20.04:LTS","Ubuntu:Pro:FIPS:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Nvidia-BlueField:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:Pro:Realtime:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Nvidia-BlueField:24.04:LTS","Ubuntu:Pro:FIPS-updates:24.04:LTS","Ubuntu:Pro:Realtime:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a5a01eb91ae9bcd3f82fc09
Added to database: 07/17/2026, 10:20:27 UTC
Last enriched: 07/30/2026, 14:09:29 UTC
Last updated: 07/31/2026, 21:27:38 UTC
Views: 5
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