CVE-2026-68230 in Linux
Summary
by MITRE • 08/10/2026
In the Linux kernel, the following vulnerability has been resolved:
media: amlogic-c3: Add validations for ae and awb config
Avoid invalid memory access if the zones_num is bigger than zone_weight.
This patch fixes the following smatch errors: drivers/media/platform/amlogic/c3/isp/c3-isp-params.c:111 c3_isp_params_awb_wt() error: buffer overflow 'cfg->zone_weight' 768 <= u32max drivers/media/platform/amlogic/c3/isp/c3-isp-params.c:111 c3_isp_params_awb_wt() error: buffer overflow 'cfg->zone_weight' 768 <= u32max drivers/media/platform/amlogic/c3/isp/c3-isp-params.c:227 c3_isp_params_ae_wt() error: buffer overflow 'cfg->zone_weight' 255 <= u32max drivers/media/platform/amlogic/c3/isp/c3-isp-params.c:227 c3_isp_params_ae_wt() error: buffer overflow 'cfg->zone_weight' 255 <= u32max
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Analysis
by VulDB Data Team • 08/10/2026
The vulnerability resides within the amlogic-c3 media driver of the linux kernel, specifically addressing memory access violations in image signal processor isp parameter handling. This issue affects the automatic exposure and automatic white balance configuration processing functions where insufficient input validation leads to potential buffer overflows. The flaw manifests when the zones_num parameter exceeds the allocated zone_weight array boundaries, creating conditions for invalid memory access patterns that could compromise system stability.
The technical implementation involves two primary functions c3_isp_params_awb_wt() and c3_isp_params_ae_wt() which process configuration parameters for automatic white balance and automatic exposure respectively. These functions fail to validate that the incoming zones_num value does not exceed predefined limits of 768 elements for AWB configuration and 255 elements for AE configuration. When malformed input data is processed, the code attempts to access memory locations beyond the allocated buffer space, resulting in undefined behavior that may lead to system crashes or privilege escalation opportunities.
From an operational perspective this vulnerability represents a critical security risk within embedded media processing systems that utilize amlogic c3 platform hardware. The buffer overflow conditions can be exploited by malicious actors to execute arbitrary code or cause denial of service attacks against devices running affected kernel versions. The impact extends beyond simple system instability as the flaw could enable attackers to gain unauthorized access to sensitive device functionalities through crafted media processing commands.
The vulnerability directly maps to CWE-121 stack-based buffer overflow and CWE-787 out-of-bounds write conditions, with potential ATT&CK mappings to privilege escalation techniques and execution of malicious code within kernel space. The smatch static analysis tool identified these specific error patterns in the c3-isp-params.c source file where the zone_weight arrays are accessed without proper bounds checking against the zones_num parameter.
Mitigation strategies should include immediate application of the provided kernel patch that implements proper input validation for zones_num parameters before memory access operations. System administrators should prioritize updating affected kernel versions and implementing runtime monitoring to detect anomalous parameter values that might indicate exploitation attempts. Additional defensive measures involve restricting media processing capabilities where possible and ensuring proper input sanitization for all external configuration data. The fix addresses the core issue by validating that zone_weight array accesses remain within allocated memory boundaries, preventing both read and write operations beyond valid buffer limits.