CVE-2026-43182

What it actually does

This is a local denial-of-service flaw in the Linux kernel CCS media/camera sensor driver. The driver calculates a scaler configuration value by dividing by the sensor-reported MIN_X_OUTPUT_SIZE limit register without first verifying that the value is nonzero. If that register value is zero, the kernel can hit a divide-by-zero exception while handling CCS camera/media configuration, potentially causing a kernel oops or system panic. The impact is availability only; the provided CVSS vector indicates local access with low privileges, no user interaction, and no confidentiality or integrity impact.

Why it matters to the business

Systems using affected Linux kernels with the CCS media driver and compatible camera/sensor hardware may be vulnerable to local disruption. A user or process with access to the relevant media device could potentially crash the kernel or make the host unstable, interrupting workloads, kiosks, embedded devices, video capture systems, or edge/IoT deployments that rely on camera hardware. The current EPSS is very low, it is not in CISA KEV, and no public exploit maturity is reported, so broad internet-scale exploitation is unlikely; however, availability-sensitive Linux endpoints and embedded systems should still be patched through normal kernel maintenance cycles.

How an attack unfolds

An attacker first needs local access to a system running an affected Linux kernel where the CCS media driver is present and reachable through camera/media device interfaces. The attacker then triggers driver code paths that read or use the CCS sensor limit registers and calculate scaler parameters. If the MIN_X_OUTPUT_SIZE value is zero, whether due to unusual hardware behavior, faulty sensor state, or manipulated device interaction, the driver performs a division by zero. In kernel context this results in a CPU exception, typically producing a kernel oops and, depending on kernel panic settings and system configuration, may crash or reboot the host. There is no indication from the supplied data that this flaw enables remote code execution, privilege escalation, data theft, or ransomware activity.

How to fix it

Apply a Linux kernel update from the relevant distribution, device vendor, or upstream kernel source that includes the fix for the CCS media driver change titled "media: ccs: Avoid possible division by zero." No exact fixed package versions were provided in the input, so organizations should rely on their OS vendor advisories and kernel changelogs. Where immediate patching is not possible, reduce exposure by disabling or unloading the CCS driver if it is not required, restricting access to media device nodes such as /dev/media* and /dev/video* to trusted users and services, and disabling unused camera hardware in BIOS/UEFI, device tree, kernel configuration, or platform policy where applicable. For embedded products, rebuild and redeploy firmware or kernel images with the patched driver.

How to confirm the fix worked

Confirm remediation by verifying that the running kernel package or firmware image includes the upstream CCS driver fix. Check the distribution changelog, kernel source tree, or vendor advisory for the patch description "media: ccs: Avoid possible division by zero." On systems where source or debug symbols are available, verify that the CCS scaler calculation now checks the MIN_X_OUTPUT_SIZE value before division. Confirm whether the vulnerable driver is present or loaded by checking for the ccs module, kernel configuration, and active media devices. After patching, reboot into the updated kernel and verify the running kernel version with uname -a. If the driver is not needed, validate that it is not loaded and that untrusted users cannot access relevant /dev/media* or /dev/video* devices.

Typical attack path

1. Identify a Linux system running an affected kernel with the CCS media/camera sensor driver available.
2. Obtain local low-privileged access to the system or to a process that can interact with the relevant media device nodes.
3. Interact with the V4L2/media/camera interface in a way that causes the CCS driver to calculate scaler configuration values.
4. Cause or encounter a zero MIN_X_OUTPUT_SIZE limit register value during that calculation.
5. Trigger the unchecked division operation in kernel context.
6. Cause a kernel divide-by-zero exception, leading to a kernel oops, crash, reboot, or loss of camera/media service availability.

How to detect it

To determine whether this was already exploited or triggered, review kernel and system logs for divide-by-zero exceptions, kernel oopses, panics, or stack traces referencing the CCS media driver. Useful sources include journalctl kernel logs, /var/log/kern.log, /var/log/messages, /var/log/syslog, persistent pstore logs, kdump/vmcore data, crash dumps, and hardware watchdog reset records. Correlate crash timestamps with user logins, sudo/session activity, process execution history, and access to media device nodes such as /dev/media* and /dev/video*. Look for repeated crashes during camera initialization, V4L2/media control operations, or activity from untrusted local users or services interacting with camera devices. Because this is a kernel availability flaw, evidence may be limited to crash artifacts rather than durable files created by an attacker.

• divide error: 0000
• Oops: divide error
• kernel BUG
• Kernel panic - not syncing
• RIP: .*ccs
• Call Trace:.*ccs
• media: ccs
• ccs.ko
• /dev/media0
• /dev/video0
• /sys/module/ccs
• pstore: console
• kdump: saving vmcore

What your security team should do

• Inventory Linux systems, embedded devices, edge systems, and camera-enabled endpoints that use the CCS media driver or CCS-compatible camera sensors.
• Prioritize patching for availability-sensitive systems, shared workstations, kiosks, video capture systems, and embedded devices where local users or applications can access media devices.
• Apply vendor-supported kernel updates that include the CCS divide-by-zero fix; because no fixed versions were supplied, track distribution advisories rather than relying on a single upstream version number.
• Restrict permissions on /dev/media* and /dev/video* device nodes to trusted users and service accounts only.
• Disable or blacklist the ccs driver on systems that do not require CCS camera sensor support.
• Monitor kernel logs for divide-by-zero, oops, panic, or ccs driver messages that may indicate attempted triggering or faulty hardware behavior.
• Treat repeated crashes involving the ccs driver as a security-relevant availability event and preserve kernel logs, crash dumps, and device access logs for investigation.