### [CVE-2021-47353](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47353)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=blue)

### Description

In the Linux kernel, the following vulnerability has been resolved:udf: Fix NULL pointer dereference in udf_symlink functionIn function udf_symlink, epos.bh is assigned with the value returnedby udf_tgetblk. The function udf_tgetblk is defined in udf/misc.cand returns the value of sb_getblk function that could be NULL.Then, epos.bh is used without any check, causing a possibleNULL pointer dereference when sb_getblk fails.This fix adds a check to validate the value of epos.bh.

### POC

#### Reference
- https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c

#### Github
No PoCs found on GitHub currently.