CVE-2021-47353

A vulnerability was found in the Linux kernel's UDF file system driver, where the udf_symlink function can dereference a NULL pointer. This occurs because the function uses a value returned from udf_tgetblk without checking if it is NULL, potentially causing system crashes if sb_getblk fails.

This vulnerability is rated as a moderate severity because it can lead to system crashes due to a NULL pointer dereference, but it requires specific conditions related to file system operations.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.