CVE-2023-53357: 
Linux Kernel vulnerability analysis and mitigation

CVE-2023-53357 is a vulnerability discovered in the Linux kernel affecting the md/raid10 component. The issue was published to the CVE List on September 17, 2025, and involves a slab-out-of-bounds condition in the mdbitmapget_counter function (NVD).

The vulnerability occurs when a large number is written to md/bitmapsetbits, causing mdbitmapcheckpage() to return -EINVAL because 'page >= bitmap->pages'. However, this return value was not checked immediately in mdbitmapgetcounter(), leading to a slab-out-of-bounds condition when setting the *blocks value. The fix involves moving the check of 'page >= bitmap->pages' to mdbitmapgetcounter() and returning directly if true (NVD, Snyk).

The vulnerability can result in a slab-out-of-bounds condition, which could potentially lead to memory corruption in the Linux kernel. According to Snyk's assessment, this vulnerability has been rated with high severity (7.0) (Snyk).

The vulnerability has been resolved in the Linux kernel through a patch that properly checks the return value in mdbitmapget_counter(). As of the current data, there is no fixed version specified for CentOS 7 kernel-headers (Snyk).