Description
In the Linux kernel, the following vulnerability has been resolved:
net: fix a resource leak in copy_net_ns() error handling path
Currently, preinit_net() does two things:
(1) call ns_common_init() which might fail (2) initialize resources which does not fail
However, preinit_net() is returning early when (1) fails, and copy_net_ns() is jumping to the dec_ucounts: label. As a result, resources allocated by net_alloc() are leaking. We need to call key_remove_domain() and net_passive_dec() in order to release resources allocated by net_alloc().
We cannot simply jump to the put_userns: label when preinit_net() failed, for (2) is not yet done. But we can reorder (1) and (2), for there is no dependency between (1) and (2). Therefore, this patch decouples (1) from preinit_net() and changes preinit_net() back to a void function, and calls ns_common_init() after preinit_net() succeeded. Then, we can jump to immediately after ns_common_free() of the put_userns: label.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 08027f6b790be1e444e4182fb4dc53faa6539d16, < 76c847e80d2b6be047707d58e8e05eedbe2593ad; >= 08027f6b790be1e444e4182fb4dc53faa6539d16, < e69bde4eb566aea8fa97cbb93e0bab608964f1a5; >= 08027f6b790be1e444e4182fb4dc53faa6539d16, < 3220b62fbb8a55feebd2a826d5ead0f49f09ed5a |
| Linux | Linux | 6.18 |
References
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received