In the Linux kernel, the following vulnerability has been resolved: ALSA: aloop: Check card index validity at probe aloop driver blindly trusts that… (CVE-2026-80972)
A vulnerability in the Linux kernel ALSA aloop driver was resolved by adding a check for card index validity during probe. The aloop driver previously trusted the devptr->id value without validation, which could be -1 if the device was manually bound via sysfs, leading to out-of-bounds (OOB) access. The fix adds sanity checks to prevent invalid index usage.
AI Analysis
Technical Summary
The ALSA aloop driver in the Linux kernel did not validate the card index (devptr->id) during device probe. While the driver-created devices had valid indices, manually bound devices via sysfs could have an index of -1 ('none'), causing out-of-bounds access to internal arrays such as index[]. The vulnerability was addressed by adding a sanity check to verify the card index and warn or correct invalid values during probe.
Potential Impact
Out-of-bounds access due to an invalid card index could lead to memory corruption or kernel instability. The vulnerability arises only when devices are manually bound via sysfs with an invalid index, which is not the normal driver behavior. No known exploits are reported.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to add sanity checks for the card index during aloop driver probe. Users should update to the patched kernel version that includes this fix. No additional mitigation is required if the system is updated.
In the Linux kernel, the following vulnerability has been resolved: ALSA: aloop: Check card index validity at probe aloop driver blindly trusts that… (CVE-2026-80972)
Description
A vulnerability in the Linux kernel ALSA aloop driver was resolved by adding a check for card index validity during probe. The aloop driver previously trusted the devptr->id value without validation, which could be -1 if the device was manually bound via sysfs, leading to out-of-bounds (OOB) access. The fix adds sanity checks to prevent invalid index usage.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The ALSA aloop driver in the Linux kernel did not validate the card index (devptr->id) during device probe. While the driver-created devices had valid indices, manually bound devices via sysfs could have an index of -1 ('none'), causing out-of-bounds access to internal arrays such as index[]. The vulnerability was addressed by adding a sanity check to verify the card index and warn or correct invalid values during probe.
Potential Impact
Out-of-bounds access due to an invalid card index could lead to memory corruption or kernel instability. The vulnerability arises only when devices are manually bound via sysfs with an invalid index, which is not the normal driver behavior. No known exploits are reported.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to add sanity checks for the card index during aloop driver probe. Users should update to the patched kernel version that includes this fix. No additional mitigation is required if the system is updated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-fqwg-gmxm-h72v
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-80972"]
Threat ID: 6aa4a02d55bf5e2cf5a86b61
Added to database: 09/12/2026, 00:43:25 UTC
Last enriched: 09/12/2026, 01:24:02 UTC
Last updated: 09/12/2026, 02:41:36 UTC
Views: 2
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