In the Linux kernel, a vulnerability has been identified related to the dpaa2-switch component. This vulnerability allows an attacker to exploit the IRQ handler, which extracts if_id from the upper 16 bits of the hardware status register. The vulnerability arises because it uses this if_id to index into the ethsw->ports[] array without proper validation, leading to potential out-of-bounds reads. Given that if_id can be any 16-bit value (0-65535) while the ports array is allocated with sw_attr.num_ifs elements, this can create a significant risk for data integrity and system stability.
The vulnerability has been assigned a CVSS score of 7, categorizing it as high severity. The implications of this vulnerability are critical, as it can affect the confidentiality, integrity, and availability of the system. Organizations relying on the Linux kernel should take immediate action to address this vulnerability by applying available patches.
The vulnerability was published on February 14, 2026, and is currently marked as deferred. Despite its status, organizations are urged to prioritize remediation efforts based on the potential impact and the high exploitability score.
Risk to organizations includes unauthorized access and manipulation of system resources, leading to a compromised environment. Organizations should prioritize patching immediately to prevent exploitation.
Vulnerability Details
The vulnerability involves a bounds check failure in the dpaa2-switch IRQ handler. This handler's failure to validate the if_id before accessing the ports array constitutes a serious security risk. The CVSS vector for this vulnerability is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H, reflecting the potential for high impact on confidentiality, integrity, and availability.
Technical Analysis
The root cause of this vulnerability is the lack of proper validation when accessing the ports array using the if_id value extracted from the hardware status register. The attack vector is local, requiring low privileges and no user interaction, which increases the likelihood of exploitation. The attack complexity is high, necessitating an understanding of the system's internal workings.
The confidentiality, integrity, and availability impacts are rated as high, underscoring the critical nature of this vulnerability. Organizations should be vigilant in monitoring their systems for any unusual activities that might indicate an attempt to exploit this flaw.
Risk & Impact Analysis
Organizations using affected versions of the Linux kernel may face significant risks, including unauthorized data access and potential system compromise. The blast radius for this vulnerability is considerable, given the widespread use of the Linux kernel in various systems and devices. Therefore, organizations should address this vulnerability in their priority patch cycle to mitigate risks effectively.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected by this vulnerability. Organizations should verify their systems and apply the necessary updates.
Mitigation & Remediation
To mitigate this vulnerability, organizations should apply the latest patches provided by the Linux kernel maintainers. If patches are unavailable, consider implementing workarounds such as restricting access to the affected components and monitoring system logs for any unusual activity. Additionally, organizations may benefit from penetration testing to assess the effectiveness of their security measures.
Detection Guidance
Organizations should monitor their logs for indicators of unauthorized access attempts or unusual IRQ handler activities. Behavioral anomalies in system performance could also indicate exploitation attempts. Implementing robust logging mechanisms can aid in the early detection of potential threats.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability is notable, as it highlights the necessity for continuous security assessments within the Linux kernel. The pattern of vulnerabilities related to the IRQ handlers and array bounds checks illustrates a recurring theme in software security. Security teams should take this as a lesson to enhance their validation processes and ensure rigorous testing during development cycles. Organizations can further strengthen their defenses by engaging in penetration testing methodology and adopting proactive security measures to prevent similar vulnerabilities in the future.
Engaging with third-party security experts can also provide organizations with valuable insights into potential vulnerabilities. In addition, organizations should be aware of the importance of vulnerability management programs that ensure timely identification and remediation of security flaws.
Finally, organizations should remain vigilant regarding new threats and trends in security, as illustrated by this and other vulnerabilities. Continuous improvement of security practices will be necessary to safeguard sensitive data and maintain operational integrity.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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