In the Linux kernel, the following vulnerability has been resolved:
openvswitch: vport: fix self-deadlock on release of tunnel ports
vports are used concurrently and protected by RCU, so netdev_put()
must happen after the RCU grace period. So, either in an RCU call or
after the synchronize_net(). The rtnl_delete_link() must happen under
RTNL and so can't be executed in RCU context. Calling synchronize_net()
while holding RTNL is not a good idea for performance and system
stability under load in general, so calling netdev_put() in RCU call
is the right solution here.
However,
when the device is deleted, rtnl_unlock() will call netdev_run_todo()
and block until all the references are gone. In the current code this
means that we never reach the call_rcu() and the vport is never freed
and the reference is never released, causing a self-deadlock on device
removal.
Fix that by moving the rcu_call() before the rtnl_unlock(), so the
scheduled RCU callback will be executed when synchronize_net() is
called from the rtnl_unlock()->netdev_run_todo() while the RTNL itself
is already released.
References
Configurations
Configuration 1 (hide)
|
History
10 Jun 2026, 21:14
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-667 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/366c482965c673565ecb8bcfb15d5548f13a6a10 - Patch | |
| References | () https://git.kernel.org/stable/c/3df75fff46b1517eb479d8e6b8e3500763715dd0 - Patch | |
| References | () https://git.kernel.org/stable/c/6522d59fb7de55ce0f0f285d962243ddffebb01f - Patch | |
| References | () https://git.kernel.org/stable/c/8ae6c15fc473c9ad03b0173330cce9a092c76154 - Patch | |
| References | () https://git.kernel.org/stable/c/aa69918bd418e700309fdd08509dba324fb24296 - Patch | |
| References | () https://git.kernel.org/stable/c/c741433f6c8dcdecd1d9549d89053761fd1ea413 - Patch |
01 Jun 2026, 17:17
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
28 May 2026, 10:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-28 10:16
Updated : 2026-06-17 10:53
NVD link : CVE-2026-46165
Mitre link : CVE-2026-46165
CVE.ORG link : CVE-2026-46165
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-667
Improper Locking