vulnerability
Ubuntu: (CVE-2023-53075): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:L/AC:L/Au:S/C:C/I:N/A:C) | May 2, 2025 | May 8, 2025 | Jun 10, 2025 |
Description
In the Linux kernel, the following vulnerability has been resolved:
ftrace: Fix invalid address access in lookup_rec() when index is 0
KASAN reported follow problem:
BUG: KASAN: use-after-free in lookup_rec
Read of size 8 at addr ffff000199270ff0 by task modprobe
CPU: 2 Comm: modprobe
Call trace:
kasan_report
__asan_load8
lookup_rec
ftrace_location
arch_check_ftrace_location
check_kprobe_address_safe
register_kprobe
When checking pg->records[pg->index - 1].ip in lookup_rec(), it can get a
pg which is newly added to ftrace_pages_start in ftrace_process_locs().
Before the first pg->index++, index is 0 and accessing pg->records[-1].ip
will cause this problem.
Don't check the ip when pg->index is 0.
Solution(s)
References
- CVE-2023-53075
- https://attackerkb.com/topics/CVE-2023-53075
- URL-https://git.kernel.org/linus/ee92fa443358f4fc0017c1d0d325c27b37802504
- URL-https://git.kernel.org/stable/c/2a0d71fabfeb349216d33f001a6421b1768bd3a9
- URL-https://git.kernel.org/stable/c/2de28e5ce34b22b73b833a21e2c45ae3aade3964
- URL-https://git.kernel.org/stable/c/4f84f31f63416b0f02fc146ffdc4ab32723eb7e8
- URL-https://git.kernel.org/stable/c/7569ee04b0e3b32df79f64db3a7138573edad9bc
- URL-https://git.kernel.org/stable/c/83c3b2f4e7c61367c7b24551f4c6eb94bbdda283
- URL-https://git.kernel.org/stable/c/ac58b88ccbbb8e9fb83e137cee04a856b1ea6635
- URL-https://git.kernel.org/stable/c/ee92fa443358f4fc0017c1d0d325c27b37802504
- URL-https://git.kernel.org/stable/c/f1bd8b7fd890d87d0dc4dedc6287ea34dd07c0b4
- URL-https://www.cve.org/CVERecord?id=CVE-2023-53075
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