In the Linux kernel, the following vulnerability has been resolved:
class: fix use-after-free in class_register()
The lock_class_key is still registered and can be found in
lock_keys_hash hlist after subsys_private is freed in error
handler path.A task who iterate over the lock_keys_hash
later may cause use-after-free.So fix that up and unregister
the lock_class_key before kfree(cp).
On our platform, a driver fails to kset_register because of
creating duplicate filename '/class/xxx'.With Kasan enabled,
it prints a invalid-access bug report.
KASAN bug report:
BUG: KASAN: invalid-access in lockdep_register_key+0x19c/0x1bc
Write of size 8 at addr 15ffff808b8c0368 by task modprobe/252
Pointer tag: [15], memory tag: [fe]
CPU: 7 PID: 252 Comm: modprobe Tainted: G W
6.6.0-mainline-maybe-dirty #1
Call trace:
dump_backtrace+0x1b0/0x1e4
show_stack+0x2c/0x40
dump_stack_lvl+0xac/0xe0
print_report+0x18c/0x4d8
kasan_report+0xe8/0x148
__hwasan_store8_noabort+0x88/0x98
lockdep_register_key+0x19c/0x1bc
class_register+0x94/0x1ec
init_module+0xbc/0xf48 [rfkill]
do_one_initcall+0x17c/0x72c
do_init_module+0x19c/0x3f8
...
Memory state around the buggy address:
ffffff808b8c0100: 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a
ffffff808b8c0200: 8a 8a 8a 8a 8a 8a 8a 8a fe fe fe fe fe fe fe fe
>ffffff808b8c0300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
^
ffffff808b8c0400: 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03
As CONFIG_KASAN_GENERIC is not set, Kasan reports invalid-access
not use-after-free here.In this case, modprobe is manipulating
the corrupted lock_keys_hash hlish where lock_class_key is already
freed before.
It's worth noting that this only can happen if lockdep is enabled,
which is not true for normal system.
References
Configurations
Configuration 1 (hide)
|
History
21 Nov 2024, 08:39
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559 - Patch | |
| References | () https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62 - Patch | |
| References | () https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04 - Patch |
17 Apr 2024, 19:00
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-416 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| First Time |
Linux linux Kernel
Linux |
|
| References | () https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559 - Patch | |
| References | () https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62 - Patch | |
| References | () https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04 - Patch |
26 Feb 2024, 16:32
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-02-26 16:27
Updated : 2024-11-21 08:39
NVD link : CVE-2023-52468
Mitre link : CVE-2023-52468
CVE.ORG link : CVE-2023-52468
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free