CVE-2022-49905
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
01/05/2025
Last modified:
02/05/2025
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
net/smc: Fix possible leaked pernet namespace in smc_init()<br />
<br />
In smc_init(), register_pernet_subsys(&smc_net_stat_ops) is called<br />
without any error handling.<br />
If it fails, registering of &smc_net_ops won&#39;t be reverted.<br />
And if smc_nl_init() fails, &smc_net_stat_ops itself won&#39;t be reverted.<br />
<br />
This leaves wild ops in subsystem linkedlist and when another module<br />
tries to call register_pernet_operations() it triggers page fault:<br />
<br />
BUG: unable to handle page fault for address: fffffbfff81b964c<br />
RIP: 0010:register_pernet_operations+0x1b9/0x5f0<br />
Call Trace:<br />
<br />
register_pernet_subsys+0x29/0x40<br />
ebtables_init+0x58/0x1000 [ebtables]<br />
...