Answer in brief
CVE-2026-23318 records a Unknown severity vulnerability in ALSA: usb-audio: Use correct version for UAC3 header validation. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=57f8770620e9b51c61089751f0b5ad3dbe376ff2 <82a7d0a1b88798de1a609130080ce0c65dd869e9 || >=57f8770620e9b51c61089751f0b5ad3dbe376ff2 <8307d93e63d5f54ef10412d4db2dd551e920dee4 || >=57f8770620e9b51c61089751f0b5ad3dbe376ff2 <0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f || >=57f8770620e9b51c61089751f0b5ad3dbe376ff2 <a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc || >=57f8770620e9b51c61089751f0b5ad3dbe376ff2 <d3904ca40515272681ae61ad6f561c24f190957f || >=57f8770620e9b51c61089751f0b5ad3dbe376ff2 <1e5753ff4c2e86aa88516f97a224c90a3d0b133e || >=57f8770620e9b51c61089751f0b5ad3dbe376ff2 <499ffd15b00dc91ac95c28f76959dfb5cdcc84d5 || >=57f8770620e9b51c61089751f0b5ad3dbe376ff2 <54f9d645a5453d0bfece0c465d34aaf072ea99fa || 17821e2fb16752f5d363fb5c3f8aab4df41b9bcc || bf74a46aebb1b5ab5e5f25bafa4ae0a453ba813a || >=4.19.84 <4.20 || >=5.3.11 <5.4 | 82a7d0a1b88798de1a609130080ce0c65dd869e9, 8307d93e63d5f54ef10412d4db2dd551e920dee4, 0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f, a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc, d3904ca40515272681ae61ad6f561c24f190957f, 1e5753ff4c2e86aa88516f97a224c90a3d0b133e, 499ffd15b00dc91ac95c28f76959dfb5cdcc84d5, 54f9d645a5453d0bfece0c465d34aaf072ea99fa, 4.20, 5.4 |
| Linux/Linuxgeneric | 5.4 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Mar 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Use correct version for UAC3 header validation The entry of the validators table for UAC3 AC header descriptor is defined with the wrong protocol version UAC_VERSION_2, while it should have been UAC_VERSION_3. This results in the validator never matching for actual UAC3 devices (protocol == UAC_VERSION_3), causing their header descriptors to bypass validation entirely. A malicious USB device presenting a truncated UAC3 header could exploit this to cause out-of-bounds reads when the driver later accesses unvalidated descriptor fields. The bug was introduced in the same commit as the recently fixed UAC3 feature unit sub-type typo, and appears to be from the same copy-paste error when the UAC3 section was created from the UAC2 section.
Quoted source text, attributed separately from HOL analysis.