CVE-2026-43294 Linux CVE debrief

Who should care

System administrators and developers using the Linux kernel, particularly those using versions 6.2 to 6.18.16 and 6.19 to 6.19.6, should assess their exposure and apply patches to fix the issue. This includes reviewing system logs for potential kernel panics, verifying the MIPI-DSI interface integrity, and ensuring system stability. IT teams responsible for Linux kernel maintenance and security should prioritize patching and monitoring.

Why it matters

CVE-2026-43294 is a kernel panic issue in the Linux kernel's drm: renesas: rz-du: mipi_dsi driver. System administrators and developers should assess their exposure, particularly for Linux kernel versions 6.2 to 6.18.16 and 6.19 to 6.19.6, and apply patches to fix the issue.

• Potential kernel panics during reboot, impacting system availability
• Need to verify and apply patches to ensure system stability
• Potential impact on system reliability and uptime

Technical summary

The Linux kernel's drm: renesas: rz-du: mipi_dsi driver has a kernel panic issue when rebooting for some panels. This is caused by the MIPI-DSI interface being stopped before rzg2l_mipi_dsi_host_transfer() is called. A fix has been implemented by moving rzg2l_mipi_dsi_stop() to a new callback function rzg2l_mipi_dsi_atomic_post_disable(). The affected Linux kernel versions are 6.2 to 6.18.16 and 6.19 to 6.19.6. Developers should review and apply patches to ensure system stability. The fix ensures the correct power-down/stop sequence for the MIPI-DSI interface.

Defensive priority

Apply patches to fix the issue, particularly for systems using the affected Linux kernel versions.

Recommended defensive actions

• Apply patches to update the Linux kernel to a version that includes the fix
• Review and update Linux kernel versions to ensure they are not vulnerable
• Monitor systems for potential kernel panics during reboot
• Verify the integrity of the MIPI-DSI interface during system reboot
• Check for any similar issues in other kernel modules
• Perform a thorough review of system logs to identify potential related issues
• Consider implementing additional monitoring for kernel panics

Evidence notes

The issue is caused by the incorrect sequence of power-down and stop operations for the MIPI-DSI interface. A fix has been implemented by moving rzg2l_mipi_dsi_stop() to a new callback function rzg2l_mipi_dsi_atomic_post_disable().

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.