In the Linux kernel, the following vulnerability has been resolved:
l2tp: close all race conditions in l2tp_tunnel_register()
The code in l2tp_tunnel_register() is racy in several ways:
1. It modifies the tunnel socket _after_ publishing it.
2. It calls setup_udp_tunnel_sock() on an existing socket without
locking.
3. It changes sock lock class on fly, which triggers many syzbot
reports.
This patch amends all of them by moving socket initialization code
before publishing and under sock lock. As suggested by Jakub, the
l2tp lockdep class is not necessary as we can just switch to
bh_lock_sock_nested().
References
Configurations
Configuration 1 (hide)
|
History
15 Apr 2025, 19:41
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-362 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.7 |
| References | () https://git.kernel.org/stable/c/0b2c59720e65885a394a017d0cf9cab118914682 - Patch | |
| References | () https://git.kernel.org/stable/c/2d77e5c0ad79004b5ef901895437e9cce6dfcc7e - Patch | |
| References | () https://git.kernel.org/stable/c/cef0845b6dcfa2f6c2c832e7f9622551456c741d - Patch | |
| References | () https://git.kernel.org/stable/c/77e8ed776cdb1a24b2aab8fe7c6f1f154235e1ce - Patch |
27 Mar 2025, 17:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-03-27 17:15
Updated : 2025-04-15 19:41
NVD link : CVE-2023-53020
Mitre link : CVE-2023-53020
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')