Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: udp_port: avoid using current->nsproxy As 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 using container_of(). Note that table->data could also be used directly, but that would increase the size of this fix, while 'sctp.ctl_sock' still needs to be retrieved from 'net' structure.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 046c052b475e7119b6a30e3483e2888fc606a2f8 before 0a0966312ac3eedd7f5f2a766ed4702df39a9a65; affected 046c052b475e7119b6a30e3483e2888fc606a2f8 before e919197fb8616331f5dc81e4c3cc3d12769cb725; affected 046c052b475e7119b6a30e3483e2888fc606a2f8 before 55627918febdf9d71107a1e68d1528dc591c9a15; affected 046c052b475e7119b6a30e3483e2888fc606a2f8 before 5b77d73f3be5102720fb685b9e6900e3500e1096; affected 046c052b475e7119b6a30e3483e2888fc606a2f8 before c10377bbc1972d858eaf0ab366a311b39f8ef1b6 |
| Linux / Linux | affected 5.11; unaffected 0 before 5.11; unaffected 5.15.177 through 5.15.*; unaffected 6.1.125 through 6.1.*; unaffected 6.6.72 through 6.6.*; unaffected 6.12.10 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0a0966312ac3eedd7f5f2a766ed4702df39a9a65
- https://git.kernel.org/stable/c/e919197fb8616331f5dc81e4c3cc3d12769cb725
- https://git.kernel.org/stable/c/55627918febdf9d71107a1e68d1528dc591c9a15
- https://git.kernel.org/stable/c/5b77d73f3be5102720fb685b9e6900e3500e1096
- https://git.kernel.org/stable/c/c10377bbc1972d858eaf0ab366a311b39f8ef1b6
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.