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Oracle Linux: (CVE-2021-47353) ELSA-2024-4211: kernel security and bug fix update

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Oracle Linux: (CVE-2021-47353) ELSA-2024-4211: kernel security and bug fix update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
05/21/2024
Created
07/04/2024
Added
07/03/2024
Modified
07/03/2024

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.

Solution(s)

  • oracle-linux-upgrade-kernel

References

  • ELSA-2024-4211
  • CVE-2021-47353

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