CVE-2022-50435 is a medium-severity vulnerability affecting the Linux kernel. This vulnerability allows for a potential crash when inline data creation follows direct I/O write operations. The issue arises when an inode is created and written to using direct I/O, without clearing the EXT4_STATE_MAY_INLINE_DATA flag. If the inode is later truncated, it can lead to confusion in data storage, manifesting as a kernel bug. Organizations should prioritize patching immediately to prevent disruptions.
The vulnerability has a CVSS score of 5.5, indicating a medium severity. It is classified as having a local attack vector, low attack complexity, and requires low privileges, with no user interaction necessary. The availability impact is high, highlighting the risk of system crashes if left unaddressed. Organizations using affected versions of the Linux kernel should take this vulnerability seriously and implement patches provided by the vendor.
Urgency for defenders is elevated, given the potential for system instability. The vulnerability was published on October 1, 2025, and has been acknowledged as part of the kernel's ongoing security improvements. Affected organizations must ensure that they have updated their systems against this vulnerability to maintain operational integrity.
The Linux community has worked to resolve this issue by implementing a fix that clears the EXT4_STATE_MAY_INLINE_DATA flag during direct I/O writes. Organizations should refer to the vendor's patch notes for specific remediation details and ensure their systems are updated accordingly.
In conclusion, CVE-2022-50435 presents a clear risk to organizations leveraging the Linux kernel. To mitigate potential exploitation, immediate action should be taken to apply patches and verify system stability.
Vulnerability Details
The vulnerability is specifically associated with the ext4 file system within the Linux kernel. When an inode is created and written using direct I/O, the failure to clear the EXT4_STATE_MAY_INLINE_DATA flag can lead to data confusion during subsequent writes.
Technical Analysis
The root cause of CVE-2022-50435 lies in how the Linux kernel manages inline data for inodes during direct I/O operations. The attack vector is local, meaning that an attacker must have access to the system to exploit this vulnerability. The attack complexity is low, as it does not require any special conditions to be met beyond having the required privileges.
No user interaction is required to exploit this vulnerability, and the impact on availability is significant, as it can lead to system crashes. The kernel's inability to manage the inline data state correctly can cause severe system instability.
Risk & Impact Analysis
Risk to organizations includes potential system crashes and data corruption, which could lead to service outages and loss of productivity. The blast radius is broad, affecting any systems running vulnerable versions of the Linux kernel.
Given the CVSS score of 5.5, organizations should address this vulnerability in their priority patch cycle. The existence of this issue in commonly used systems highlights the importance of maintaining an up-to-date security posture.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability impacts the Linux kernel versions from 5.5 to less than 5.10.150, as well as versions from 5.11 to less than 5.15.75, versions from 5.16 to less than 5.19.17, and versions from 6.0 to less than 6.0.3.
Mitigation & Remediation
Organizations should apply the vendor's patches as soon as possible to mitigate the risk associated with CVE-2022-50435. For those unable to immediately apply the patches, it is recommended to implement workarounds that ensure the EXT4_STATE_MAY_INLINE_DATA flag is properly managed during direct I/O operations. Additional hardening measures, such as restricting access to the filesystem and monitoring for unusual behavior, should also be considered.
Detection Guidance
Organizations should monitor system logs for indicators of failure related to the ext4 filesystem, particularly in situations where direct I/O operations are performed. Behavioral anomalies such as unexpected kernel panics or crashes should be logged and investigated promptly.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-50435 lies in its illustration of how subtle mismanagement of filesystem states can lead to critical system failures. This vulnerability represents a pattern of risks associated with filesystem integrity and highlights the importance of robust error handling in critical system components. Security teams should take this opportunity to review their filesystem configurations and ensure proper management of inline data states in their systems.
Penetration testing can further help uncover similar vulnerabilities that may exist in other components of your infrastructure.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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