CVE-2024-53150: Linux Kernel Out-of-Bounds Read Vulnerability

CVE-2024-53150 is an out-of-bounds read vulnerability in the Linux Kernel's USB-audio driver. A local, privileged attacker can exploit it to obtain potentially sensitive information from kernel memory. This matters for systems that handle USB audio devices because successful abuse can leak data that aids further attacks, even though the flaw requires local privileged access and is not documented for ransomware use.

Defenders should treat it as a confidentiality risk on Linux hosts that load the affected driver. Confirm all version and patch details against the vendor advisory before acting.

How it works

The vulnerability is classified as CWE-125, an out-of-bounds read. In the USB-audio driver, the kernel can read memory beyond the intended buffer boundary when processing certain USB audio operations. A local attacker who already holds elevated privileges can trigger this condition to retrieve data that should remain inaccessible.

Because the attacker must already be privileged and local, the primary impact is information disclosure rather than remote code execution. The leaked data may include kernel pointers or other sensitive values that could assist privilege escalation or other follow-on activity. Exact trigger conditions and memory contents are not detailed in the public summary; treat any exploit claims as unconfirmed until verified against the vendor advisory.

Am I affected? How to find it in your systems

The Linux Kernel is ubiquitous on servers, workstations, containers, embedded devices, and cloud instances. The vulnerability specifically involves the USB-audio driver, so systems that never load USB audio modules are at lower risk, but inventory should still cover all kernels.

• Inventory kernels with commands such as uname -r, cat /proc/version, or package queries (rpm -q kernel, dpkg -l | grep linux-image).
• Check whether the USB-audio module is present or loaded (lsmod | grep snd_usb_audio, modinfo snd-usb-audio).
• Review configuration for USB audio support in kernel configs or distro packages.
• Confirm exact affected versions and fixed releases against the vendor advisory; do not rely on third-party version lists.

Telemetry signs of exploitation are limited because the flaw is an information leak. Look for unusual privileged processes interacting with USB audio devices, unexpected kernel oops or warnings related to the sound subsystem, or anomalous memory access patterns in audit logs. Absence of such signals does not prove safety.

How to remediate

Apply the vendor-supplied kernel update that addresses CVE-2024-53150 as the primary remediation. Follow the distribution or upstream Linux Kernel instructions exactly; rebuild or reboot as required so the patched kernel is running.

• After patching, verify the new kernel version and that the USB-audio driver is the fixed build.
• For cloud or managed images, apply the provider's updated kernel or AMI and restart instances.
• If the product cannot be patched, discontinue use of the affected component per CISA guidance, or follow BOD 22-01 for cloud services.

As hardening for this class of flaw, keep the kernel and modules fully updated, restrict local privileged access, and unload or blacklist the USB-audio module on systems that do not require it.

If you can't patch immediately

Reduce exposure until the update can be applied. Segment systems that use USB audio so that only necessary hosts can reach them. Disable or blacklist the snd-usb-audio module where audio over USB is not required. Enforce least privilege so fewer accounts can load kernel modules or interact with USB devices. Monitor for privileged local activity and USB device enumeration events. Virtual patching or WAF rules are generally ineffective against a local kernel driver flaw; focus on access controls and monitoring instead. Confirm any temporary workarounds against the vendor advisory.

If your data may have been exposed

Actively exploited kernel vulnerabilities can lead to broader compromise and data exposure. Although ransomware use is not documented for this CVE, treat any confirmed exploitation as a potential breach. Review logs for signs of local privilege abuse, rotate credentials that may have been present in memory, and assess whether sensitive data could have been read. You can run a free exposure scan of your email addresses against known breach data to check for prior compromises that might compound the risk.