1.5 KiB
CVE-2025-21636
Description
In the Linux kernel, the following vulnerability has been resolved:sctp: sysctl: plpmtud_probe_interval: avoid using current->nsproxyAs mentioned in a previous commit of this series, using the 'net'structure via 'current' is not recommended for different reasons:- Inconsistency: getting info from the reader's/writer's netns vs only from the opener's netns.- current->nsproxy can be NULL in some cases, resulting in an 'Oops' (null-ptr-deref), e.g. when the current task is exiting, as spotted by syzbot [1] using acct(2).The 'net' structure can be obtained from the table->data usingcontainer_of().Note that table->data could also be used directly, as this is the onlymember needed from the 'net' structure, but that would increase the sizeof this fix, to use '*data' everywhere 'net->sctp.probe_interval' isused.
POC
Reference
No PoCs from references.