In the Linux kernel, the following vulnerability has been resolved:
dm btree remove: assign new_root only when removal succeeds
remove_raw() in dm_btree_remove() may fail due to IO read error
(e.g. read the content of origin block fails during shadowing),
and the value of shadow_spine::root is uninitialized, but
the uninitialized value is still assign to new_root in the
end of dm_btree_remove().
For dm-thin, the value of pmd->details_root or pmd->root will become
an uninitialized value, so if trying to read details_info tree again
out-of-bound memory may occur as showed below:
general protection fault, probably for non-canonical address 0x3fdcb14c8d7520
CPU: 4 PID: 515 Comm: dmsetup Not tainted 5.13.0-rc6
Hardware name: QEMU Standard PC
RIP: 0010:metadata_ll_load_ie+0x14/0x30
Call Trace:
sm_metadata_count_is_more_than_one+0xb9/0xe0
dm_tm_shadow_block+0x52/0x1c0
shadow_step+0x59/0xf0
remove_raw+0xb2/0x170
dm_btree_remove+0xf4/0x1c0
dm_pool_delete_thin_device+0xc3/0x140
pool_message+0x218/0x2b0
target_message+0x251/0x290
ctl_ioctl+0x1c4/0x4d0
dm_ctl_ioctl+0xe/0x20
__x64_sys_ioctl+0x7b/0xb0
do_syscall_64+0x40/0xb0
entry_SYSCALL_64_after_hwframe+0x44/0xae
Fixing it by only assign new_root when removal succeeds
References
Configurations
Configuration 1 (hide)
|
History
12 May 2025, 19:58
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-1188 | |
| References | () https://git.kernel.org/stable/c/4c84b3e0728ffe10d89c633694c35a02b5c477dc - Patch | |
| References | () https://git.kernel.org/stable/c/73f27adaa73e3057a9ec464e33c4f54d34ea5de3 - Patch | |
| References | () https://git.kernel.org/stable/c/89bf942314b78d454db92427201421b5dec132d9 - Patch | |
| References | () https://git.kernel.org/stable/c/8fbae4a1bdb5b889490cdee929e68540151536e5 - Patch | |
| References | () https://git.kernel.org/stable/c/964d57d1962d7e68f0f578f05d9ae4a104d74851 - Patch | |
| References | () https://git.kernel.org/stable/c/ad365e9351ac2b450e7e79932ff6abf59342d91a - Patch | |
| References | () https://git.kernel.org/stable/c/b6e58b5466b2959f83034bead2e2e1395cca8aeb - Patch | |
| References | () https://git.kernel.org/stable/c/ba47e65a5de3e0e8270301a409fc63d3129fdb9e - Patch | |
| References | () https://git.kernel.org/stable/c/c154775619186781aaf8a99333ac07437a1768d5 - Patch |
21 Nov 2024, 06:35
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/4c84b3e0728ffe10d89c633694c35a02b5c477dc - | |
| References | () https://git.kernel.org/stable/c/73f27adaa73e3057a9ec464e33c4f54d34ea5de3 - | |
| References | () https://git.kernel.org/stable/c/89bf942314b78d454db92427201421b5dec132d9 - | |
| References | () https://git.kernel.org/stable/c/8fbae4a1bdb5b889490cdee929e68540151536e5 - | |
| References | () https://git.kernel.org/stable/c/964d57d1962d7e68f0f578f05d9ae4a104d74851 - | |
| References | () https://git.kernel.org/stable/c/ad365e9351ac2b450e7e79932ff6abf59342d91a - | |
| References | () https://git.kernel.org/stable/c/b6e58b5466b2959f83034bead2e2e1395cca8aeb - | |
| References | () https://git.kernel.org/stable/c/ba47e65a5de3e0e8270301a409fc63d3129fdb9e - | |
| References | () https://git.kernel.org/stable/c/c154775619186781aaf8a99333ac07437a1768d5 - | |
| Summary |
|
21 May 2024, 15:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-05-21 15:15
Updated : 2025-05-12 19:58
NVD link : CVE-2021-47343
Mitre link : CVE-2021-47343
CVE.ORG link : CVE-2021-47343
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-1188
Insecure Default Initialization of Resource