Linux Kernel Write Access Vulnerability in Binfmt Misc Component

A vulnerability has been identified in the Linux kernel's binfmt_misc component, specifically in the handling of executable files. When an executable file is opened by the bm_register_write() function, write access is denied to prevent modifications during execution. However, if an error occurs, the function closes the file without restoring the write permission. This oversight can lead to failed write operations on the same file later. The vulnerability affects the Linux kernel stable tree.

Impact

The vulnerability can cause write operations on files opened by the bm_register_write() function to fail, leading to potential disruptions in processes that require file modifications.

Remediation

Users can apply the patch available in the Linux kernel stable tree to address this vulnerability. The patch is included in the upstream commit referenced in the CVE description.