Bug 2265267 (CVE-2023-52436) - CVE-2023-52436 kernel: f2fs: explicitly null-terminate the xattr list
Summary: CVE-2023-52436 kernel: f2fs: explicitly null-terminate the xattr list
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2023-52436
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2265268
Blocks: 2265182
TreeView+ depends on / blocked
 
Reported: 2024-02-21 08:21 UTC by Avinash Hanwate
Modified: 2024-02-25 10:38 UTC (History)
49 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel’s f2fs subsystem. When setting an xattr, explicitly null-terminate the xattr list. This eliminates the assumption that the unused xattr space is always zeroed.
Clone Of:
Environment:
Last Closed: 2024-02-25 10:38:06 UTC
Embargoed:

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Description Avinash Hanwate 2024-02-21 08:21:00 UTC 
In the Linux kernel, the following vulnerability has been resolved:

f2fs: explicitly null-terminate the xattr list

When setting an xattr, explicitly null-terminate the xattr list.  This eliminates the fragile assumption that the unused xattr space is always
zeroed.

https://git.kernel.org/stable/c/12cf91e23b126718a96b914f949f2cdfeadc7b2a
https://git.kernel.org/stable/c/16ae3132ff7746894894927c1892493693b89135
https://git.kernel.org/stable/c/2525d1ba225b5c167162fa344013c408e8b4de36
https://git.kernel.org/stable/c/32a6cfc67675ee96fe107aeed5af9776fec63f11
https://git.kernel.org/stable/c/3e47740091b05ac8d7836a33afd8646b6863ca52
https://git.kernel.org/stable/c/5de9e9dd1828db9b8b962f7ca42548bd596deb8a
https://git.kernel.org/stable/c/e26b6d39270f5eab0087453d9b544189a38c8564
https://git.kernel.org/stable/c/f6c30bfe5a49bc38cae985083a11016800708fea
Comment 1 Avinash Hanwate 2024-02-21 08:22:48 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2265268]
Comment 3 Eric Sandeen 2024-02-21 14:32:40 UTC 
We don't build or ship F2FS in RHEL8 or RHEL8.
Comment 4 Justin M. Forbes 2024-02-21 22:54:35 UTC 
This was fixed for Fedora with the 6.6.13 stable kernel updates.
Comment 5 Alex 2024-02-25 10:38:06 UTC 
In reply to comment #3:
> We don't build or ship F2FS in RHEL8 or RHEL8.

Right, the
# CONFIG_F2FS_FS is not set
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