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CVE-2021-47353 Detail

Description

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


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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Hyperlink Resource
https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238 Patch 
https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238 Patch 
https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c Patch 
https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c Patch 
https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5 Patch 
https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5 Patch 
https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9 Patch 
https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9 Patch 
https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6 Patch 
https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6 Patch 
https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b Patch 
https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b Patch 
https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02 Patch 
https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02 Patch 
https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d Patch 
https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d Patch 
https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43 Patch 
https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43 Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST  

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47353
NVD Published Date:
05/21/2024
NVD Last Modified:
12/24/2024
Source:
kernel.org