In the Linux kernel, the following vulnerability has been resolved:
netfilter: x_tables: fix percpu counter block leak on error path when creating new netns
Here is the stack where we allocate percpu counter block:
+-< __alloc_percpu
+-< xt_percpu_counter_alloc
+-< find_check_entry # {arp,ip,ip6}_tables.c
+-< translate_table
And it can be leaked on this code path:
+-> ip6t_register_table
+-> translate_table # allocates percpu counter block
+-> xt_register_table # fails
there is no freeing of the counter block on xt_register_table fail.
Note: xt_percpu_counter_free should be called to free it like we do in
do_replace through cleanup_entry helper (or in __ip6t_unregister_table).
Probability of hitting this error path is low AFAICS (xt_register_table
can only return ENOMEM here, as it is not replacing anything, as we are
creating new netns, and it is hard to imagine that all previous
allocations succeeded and after that one in xt_register_table failed).
But it's worth fixing even the rare leak.
References
Configurations
Configuration 1 (hide)
|
History
04 Dec 2025, 15:07
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux
Linux linux Kernel |
|
| CWE | CWE-401 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| References | () https://git.kernel.org/stable/c/0af8c09c896810879387decfba8c942994bb61f5 - Patch | |
| References | () https://git.kernel.org/stable/c/3cc9610a87b7dde82f7360dd4eb6c2c27940ed57 - Patch | |
| References | () https://git.kernel.org/stable/c/512b6c4b83c91d007301ea7d7f095d16c3aceacd - Patch | |
| References | () https://git.kernel.org/stable/c/e306dbee4c98025a9326386023a12ef4d887e9d1 - Patch |
15 Sep 2025, 15:22
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-09-15 15:15
Updated : 2025-12-04 15:07
NVD link : CVE-2023-53200
Mitre link : CVE-2023-53200
CVE.ORG link : CVE-2023-53200
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-401
Missing Release of Memory after Effective Lifetime