CVE-2024-47723

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.6.58

Description The issue is related to the JFS module in the Linux kernel, where there is no check for the case where bmp->db numag is greater or same than MAXAG due to a polluted image, causing an out-of-bounds condition in dbNextAG(). Additionally, there is no check for the case where agpref is greater than bmp->db numag in dbNextAG(), and no check for the case where agno is greater or same than MAXAG in diAlloc(), both of which can lead to out-of-bounds exceptions.

Recommendations For Linux kernel versions prior to 6.6.58, update to version 6.6.58 or later to resolve the issue. As a temporary workaround, consider adding bounds checks in dbMount() and dbNextAG() to prevent out-of-bounds exceptions until a patch is available. Restrict access to the JFS module to minimize the risk of exploitation. Avoid using the dbNextAG() and diAlloc() functions in the affected kernel versions until the issue is resolved.