CVE-2021-47353

medium

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.

References

https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43

https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d

https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02

https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b

https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6

https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9

https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5

https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c

https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238

Details

Source: Mitre, NVD

Published: 2024-05-21

Updated: 2024-05-21

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium