Bug 1225093 (CVE-2023-52748)

Summary: VUL-0: CVE-2023-52748: kernel: f2fs: avoid format-overflow warning
Product: [Novell Products] SUSE Security Incidents Reporter: SMASH SMASH <smash_bz>
Component: IncidentsAssignee: Kernel Bugs <kernel-bugs>
Status: RESOLVED INVALID QA Contact: Security Team bot <security-team>
Severity: Normal    
Priority: P5 - None CC: carlos.lopez
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/407099/
Whiteboard: CVSSv3.1:SUSE:CVE-2023-52748:6.1:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H)
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-05-23 08:57:44 UTC
In the Linux kernel, the following vulnerability has been resolved:

f2fs: avoid format-overflow warning

With gcc and W=1 option, there's a warning like this:

fs/f2fs/compress.c: In function ‘f2fs_init_page_array_cache’:
fs/f2fs/compress.c:1984:47: error: ‘%u’ directive writing between
1 and 7 bytes into a region of size between 5 and 8
[-Werror=format-overflow=]
 1984 |  sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev),
		MINOR(dev));
      |                                               ^~

String "f2fs_page_array_entry-%u:%u" can up to 35. The first "%u" can up
to 4 and the second "%u" can up to 7, so total size is "24 + 4 + 7 = 35".
slab_name's size should be 35 rather than 32.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52748
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2023/CVE-2023-52748.mbox
https://git.kernel.org/stable/c/c041f5ddef00c731c541e00bc8ae97b8c84c682f
https://git.kernel.org/stable/c/e4088d7d8f1123006d46a42edf51b8c960a58ef9
https://git.kernel.org/stable/c/526dd7540a09ecf87b5f54f3ab4e0a2528f25a79
https://git.kernel.org/stable/c/6fca08fd3085253b48fcb1bd243a0a5e18821a00
https://git.kernel.org/stable/c/3eebe636cac53886bd5d1cdd55e082ec9e84983f
https://git.kernel.org/stable/c/e0d4e8acb3789c5a8651061fbab62ca24a45c063
https://www.cve.org/CVERecord?id=CVE-2023-52748
Comment 1 Carlos López 2024-05-23 08:58:10 UTC
f2fs is not supported in our kernels, closing.