Entreprise d'experts en Sécurité Informatique : Audits et conseils en cybersécurité
Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com


CVE-2021-47353

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.