CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's SMB client, specifically in the `symlink_data()` function, where an overflow in the ALIGN() macro can lead to an infinite loop and out-of-bounds read. This flaw allows attackers to potentially access stale data, which could compromise system integrity and confidentiality. Organizations using Linux kernel versions susceptible to this issue should prioritize applying the fix to mitigate risks associated with this vulnerability.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix ALIGN() overflow in symlink_data() error context loop The check added by commit 7d9a7f1f96cd ("smb/client: fix possible infinite loop and oob read in symlink_data()") compared the post-ALIGN length against the remaining buffer, but ALIGN() itself can overflow: for ErrorDataLength near UINT32_MAX (e.g. 0xFFFFFFF9), ALIGN(x, 8) wraps to 0, so the subsequent bounds check passes, and the loop advances by zero bytes leaving 'p' pointing into stale data. Fix by checking the raw ErrorDataLength against the remaining space before applying ALIGN(), then checking again after. Since raw_len is bounded by the buffer, raw_len + 7 cannot overflow, so the second check is an exact post-alignment bounds guard.