Horizon Alert
Summary of the vulnerability and why it matters
The Linux kernel's USB-audio driver contains a vulnerability related to descriptor handling. When processing clock descriptors from a USB device, the driver does not adequately verify the length of each descriptor. This can lead to the driver reading beyond the allocated memory boundaries, potentially causing system instability or data corruption.
- Vulnerable Linux kernel USB-audio driver
- Inaccurate descriptor length checks
- System instability and data corruption
Attack Path
How an attacker could exploit the issue
This vulnerability impacts systems utilizing the Linux kernel's USB-audio driver. An attacker with local access can exploit a flaw in how the driver processes USB audio clock descriptors. When a device presents a malformed descriptor with an incorrect length, the driver may attempt to read beyond its allocated memory boundaries. This could lead to the disclosure of sensitive information or system instability.
- Local, privileged access required.
- Malformed USB descriptor presented.
- Out-of-bounds read and impact.
Live Threat
Current exploitation, exposure, and threat context
A local attacker with low privileges could exploit this vulnerability. Exploitation requires the ability to attach a specially crafted USB device to the system. If successful, the vulnerability could lead to kernel memory disclosure or a denial-of-service condition. This vulnerability has been added to the CISA Known Exploited Vulnerabilities catalog, indicating active exploitation.
- Likely attacker skill level: Low
- Required access or conditions: Local access, USB device
- Business risk or urgency: High
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability, related to the Linux kernel's USB-audio driver, could allow a local attacker to read unauthorized memory. While the impact is localized, the potential for data exposure warrants attention. Organizations should proactively identify systems that could be affected and take steps to mitigate risk.
- Find Linux systems using the USB-audio driver.
- Isolate systems or restrict USB device access.
- Apply vendor security updates and validate.
- Monitor for related security events.
