CVE-2026-99271: Linux kernel · ALSA: line6: Clear prev_fbuf on capture buffer release
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in aa118c8f61d59387961d58ffae831c5259a9f222 : update Linux kernel when convenient.
Data as of 7 Nov 2026, 14:20 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in aa118c8f61d59387961d58ffae831c5259a9f222, 862d9268f40a6e10cef24eb226e738fb69ce8aa7, 22c82f33ff0b68d37041adf1dea5533a5863cd31
Exploitation evidence
Disclosed: evidence found.
CVE published 7 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.
What to do
Upgrade Linux kernel to aa118c8f61d59387961d58ffae831c5259a9f222, 862d9268f40a6e10cef24eb226e738fb69ce8aa7 or 22c82f33ff0b68d37041adf1dea5533a5863cd31.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in specific Linux kernel commits (aa118c8f61d59387961d58ffae831c5259a9f222, 862d9268f40a6e10cef24eb226e738fb69ce8aa7, 22c82f33ff0b68d37041adf1dea5533a5863cd31). Users should update to a Linux kernel version that includes these fixes to remediate the vulnerability.
Description
A use-after-free vulnerability in the Linux kernel ALSA line6 driver was fixed by clearing a stale pointer on capture buffer release. The issue involved a slab-use-after-free read in submit_audio_out_urb() when generating an impulse test signal, caused by not clearing the prev_fbuf pointer after freeing the capture buffer. This could lead to dereferencing freed memory during playback startup.