Bug 2035817 (CVE-2021-45469) - CVE-2021-45469 kernel: out-of-bounds memory access in __f2fs_setxattr() in fs/f2fs/xattr.c when an inode has an invalid last xattr entry
Summary: CVE-2021-45469 kernel: out-of-bounds memory access in __f2fs_setxattr() in fs...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2021-45469
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2035818
Blocks: 2035819
TreeView+ depends on / blocked
 
Reported: 2021-12-27 19:59 UTC by Guilherme de Almeida Suckevicz
Modified: 2022-01-05 19:35 UTC (History)
47 users (show)

Fixed In Version:
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Doc Text:
An out-of-bounds memory access flaw in the Linux kernel's F2FS (Flash-Friendly File System) functionality was found in the way users mount and operate corrupted image of this file-system if an inode has an invalid last xattr entry. A local user could use this flaw to crash the system or escalate their privileges on the system.
Clone Of:
Environment:
Last Closed: 2021-12-29 09:47:46 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2021-12-27 19:59:23 UTC 
In __f2fs_setxattr in fs/f2fs/xattr.c in the Linux kernel through 5.15.11, there is an out-of-bounds memory access when an inode has an invalid last xattr entry.

References:
https://bugzilla.kernel.org/show_bug.cgi?id=215235
http://www.openwall.com/lists/oss-security/2021/12/25/1

Upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?h=dev&id=5598b24efaf4892741c798b425d543e4bed357a1
Comment 1 Guilherme de Almeida Suckevicz 2021-12-27 20:00:07 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2035818]
Comment 3 Product Security DevOps Team 2021-12-29 09:47:42 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-45469
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