CVE-2024-47670 in Linux
Summary
by MITRE • 10/09/2024
In the Linux kernel, the following vulnerability has been resolved:
ocfs2: add bounds checking to ocfs2_xattr_find_entry()
Add a paranoia check to make sure it doesn't stray beyond valid memory region containing ocfs2 xattr entries when scanning for a match. It will prevent out-of-bound access in case of crafted images.
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Analysis
by VulDB Data Team • 03/21/2026
The vulnerability identified as CVE-2024-47670 resides within the Linux kernel's ocfs2 filesystem implementation, specifically in the ocfs2_xattr_find_entry() function. This issue represents a classic out-of-bounds memory access flaw that could potentially be exploited by malicious actors to compromise system integrity. The ocfs2 filesystem is a cluster filesystem designed for high availability and shared storage environments, making this vulnerability particularly concerning for enterprise and data center deployments where multiple nodes access the same storage resources.
The technical flaw manifests in the absence of proper bounds checking during the scanning process for extended attribute entries within the ocfs2 filesystem. When the ocfs2_xattr_find_entry() function processes crafted or malformed filesystem images, it fails to validate memory boundaries, allowing the function to traverse beyond the legitimate memory region containing ocfs2 extended attribute entries. This oversight creates a scenario where an attacker could construct specially crafted filesystem images that, when processed by the kernel, would trigger memory access violations or potentially enable arbitrary code execution.
This vulnerability directly maps to CWE-129, which describes improper validation of array indices, and aligns with ATT&CK technique T1059.001 for command and scripting interpreter execution. The operational impact extends beyond simple memory corruption as it could enable privilege escalation or denial of service conditions within systems utilizing ocfs2 filesystems. The paranoia check added in the resolution addresses the root cause by implementing proper boundary validation, ensuring that memory access operations remain confined to valid regions and preventing the traversal of unauthorized memory segments.
Systems running Linux kernels with ocfs2 filesystem support are at risk, particularly those in high-availability clusters or environments where filesystem images might be processed from untrusted sources. The vulnerability's exploitability depends on the ability to craft malicious filesystem images that trigger the specific code path within ocfs2_xattr_find_entry(), making it a target for sophisticated attacks in environments where filesystem integrity cannot be guaranteed. Organizations should prioritize kernel updates that include the bounds checking fix to mitigate this vulnerability and maintain system security posture against potential exploitation attempts.