In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire-motu: add bounds check in put_user loop for DSP events In the DSP… (CVE-2025-68753)
A vulnerability in the Linux kernel ALSA firewire-motu driver was resolved by adding a bounds check in a put_user loop handling DSP events. Without this check, when the user buffer size was not aligned to 4 bytes, the code could overwrite memory beyond the buffer boundary. This flaw could lead to integrity and availability impacts. The issue has been fixed by adding appropriate bounds checking before the put_user operation.
AI Analysis
Technical Summary
The vulnerability (CVE-2025-68753) exists in the ALSA firewire-motu driver within the Linux kernel. The DSP event handling code uses a put_user loop to copy event data. If the user buffer size is not 4-byte aligned, the loop could write beyond the intended buffer boundary, causing memory corruption. This could impact the integrity and availability of the system. The fix involves adding a bounds check before each put_user call to prevent buffer overflows.
Potential Impact
The vulnerability allows out-of-bounds memory writes when user buffers are not properly aligned, potentially leading to integrity and availability issues in the affected system. Confidentiality is not impacted. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix has been implemented in the Linux kernel by adding bounds checking in the put_user loop for DSP events in the ALSA firewire-motu driver. Users should apply the official kernel updates that include this patch once available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire-motu: add bounds check in put_user loop for DSP events In the DSP… (CVE-2025-68753)
Description
A vulnerability in the Linux kernel ALSA firewire-motu driver was resolved by adding a bounds check in a put_user loop handling DSP events. Without this check, when the user buffer size was not aligned to 4 bytes, the code could overwrite memory beyond the buffer boundary. This flaw could lead to integrity and availability impacts. The issue has been fixed by adding appropriate bounds checking before the put_user operation.
CVSS v3.1
Score 7.1high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability (CVE-2025-68753) exists in the ALSA firewire-motu driver within the Linux kernel. The DSP event handling code uses a put_user loop to copy event data. If the user buffer size is not 4-byte aligned, the loop could write beyond the intended buffer boundary, causing memory corruption. This could impact the integrity and availability of the system. The fix involves adding a bounds check before each put_user call to prevent buffer overflows.
Potential Impact
The vulnerability allows out-of-bounds memory writes when user buffers are not properly aligned, potentially leading to integrity and availability issues in the affected system. Confidentiality is not impacted. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix has been implemented in the Linux kernel by adding bounds checking in the put_user loop for DSP events in the ALSA firewire-motu driver. Users should apply the official kernel updates that include this patch once available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-fg49-cm53-vpfx
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2025-68753"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a6b72d29c2644c7f847768b
Added to database: 07/30/2026, 15:50:42 UTC
Last enriched: 07/30/2026, 18:58:51 UTC
Last updated: 09/10/2026, 19:38:46 UTC
Views: 8
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