Bug 2297555 (CVE-2024-40971) - CVE-2024-40971 kernel: f2fs: remove clear SB_INLINECRYPT flag in default_options
Summary: CVE-2024-40971 kernel: f2fs: remove clear SB_INLINECRYPT flag in default_options
Keywords:
Status: NEW
Alias: CVE-2024-40971
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-07-12 13:43 UTC by OSIDB Bzimport
Modified: 2024-08-01 22:29 UTC (History)
4 users (show)

Fixed In Version: kernel 5.10.221, kernel 5.15.162, kernel 6.1.96, kernel 6.6.36, kernel 6.9.7, kernel 6.10-rc1
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Description OSIDB Bzimport 2024-07-12 13:43:26 UTC 
In the Linux kernel, the following vulnerability has been resolved:

f2fs: remove clear SB_INLINECRYPT flag in default_options

In f2fs_remount, SB_INLINECRYPT flag will be clear and re-set.
If create new file or open file during this gap, these files
will not use inlinecrypt. Worse case, it may lead to data
corruption if wrappedkey_v0 is enable.

Thread A:                               Thread B:

-f2fs_remount				-f2fs_file_open or f2fs_new_inode
  -default_options
	<- clear SB_INLINECRYPT flag

                                          -fscrypt_select_encryption_impl

  -parse_options
	<- set SB_INLINECRYPT again
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