In the Linux kernel, a critical vulnerability has been identified in the tegra crypto driver. This vulnerability arises due to the driver's failure to set the CRYPTO_ALG_ASYNC flag on its asynchronous algorithms. As a result, the crypto API may mistakenly select these algorithms for users who specifically request only synchronous algorithms, leading to system instability and potential crashes.
The vulnerability has been assigned a CVSS score of 8.8, categorizing it as high severity. This high score reflects the significant risks associated with exploitation, including potential denial of service, which can affect the confidentiality, integrity, and availability of the system.
As organizations may rely on the Linux kernel for critical applications, the urgency for defenders cannot be overstated. Organizations should prioritize patching immediately to mitigate the risks posed by this vulnerability.
It is important to note that as of now, this vulnerability is classified as 'Awaiting Analysis', and thus no public exploits have been confirmed. However, the potential for future exploitation highlights the need for proactive measures.
Vulnerability Details
The vulnerability in question is due to the tegra crypto driver failing to properly set the CRYPTO_ALG_ASYNC flag for its asynchronous algorithms. This oversight may lead to erroneous selections by the crypto API, causing system crashes.
The vulnerability has a CVSS score of 8.8, indicating high severity. The low attack complexity and required privileges suggest that it could be exploited easily by an attacker with limited access.
Published on May 1, 2026, the vulnerability is categorized under the high-impact vulnerabilities that affect the confidentiality, integrity, and availability of the system.
Technical Analysis
The root cause of this vulnerability stems from the tegra crypto driver’s failure to correctly implement the CRYPTO_ALG_ASYNC flag. This error leads the crypto API to incorrectly select asynchronous algorithms for users who request synchronous operations.
The attack vector is classified as NETWORK, and the attack complexity is LOW, meaning that an attacker does not require extensive resources to exploit this vulnerability. Additionally, the privileges required to exploit this vulnerability are LOW, and no user interaction is necessary.
The impacts of this vulnerability include high confidentiality, integrity, and availability risks, which could lead to system crashes and denial of service.
Risk & Impact Analysis
The deployment of the Linux kernel across various platforms amplifies the risk associated with this vulnerability. Organizations utilizing affected systems must recognize the potential for significant disruption, particularly if this vulnerability is exploited in a production environment.
The urgency of addressing this vulnerability is underscored by its high CVSS score. Organizations should address this vulnerability in their priority patch cycle to avoid potential system crashes and maintain operational integrity.
Given the widespread use of the Linux kernel, the blast radius potential is extensive, affecting numerous users and systems globally. It is imperative for organizations to take proactive measures to safeguard their infrastructures.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Specific version information for this vulnerability is not provided; thus, it is advisable to consider all versions prior to vendor patch as affected.
Mitigation & Remediation
Organizations should prioritize patching to remediate this vulnerability. The fix involves updating the tegra crypto driver to ensure the CRYPTO_ALG_ASYNC flag is correctly set.
Continuous penetration testing can also help identify similar vulnerabilities and ensure the overall security posture is strengthened.
Detection Guidance
Organizations should monitor logs for unusual behaviors associated with this vulnerability, including any unexpected crashes in systems utilizing the tegra crypto driver.
Additionally, network signatures should be established to detect any anomalies that may indicate exploitation attempts.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2026-31739 extends beyond immediate remediation. It highlights a critical aspect of driver development in the Linux kernel, where proper flag settings are vital for maintaining system integrity.
This vulnerability represents a trend in security where even minimal oversights in coding can lead to significant vulnerabilities. Security teams must ensure that comprehensive testing and validation processes are integrated into the development lifecycle.
Organizations should adopt a proactive stance on security by continuously evaluating their systems and employing strategies such as penetration testing methodology to uncover vulnerabilities before they can be exploited.
Investing in robust security measures and fostering a culture of security awareness will be essential in mitigating risks associated with vulnerabilities like CVE-2026-31739.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)